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- Author:
- Askew Shawn D.; Wilcut John W.
- Source:
- Weed science 2002 v.50 no.3 pp. 293-298
- ISSN:
- 0043-1745
- Subject:
- Arachis hypogaea; Datura stramonium; Gossypium hirsutum; Senna obtusifolia; absorption; cotton; foliar application; half life; herbicides; leaves; meristems; metabolism; metabolites; peanuts; sodium; weeds
- Abstract:
- ... Studies were conducted to evaluate absorption, translocation, and metabolism of ¹⁴C-CGA 362622 when foliar applied to cotton, peanut, jimsonweed, and sicklepod. Differential metabolism is the basis for tolerance in cotton and jimsonweed. In addition, cotton absorbs less herbicide compared with the other three species, thus aiding in tolerance. Only jimsonweed translocated appreciable herbicide (25 ...
- DOI:
- 10.1614/0043-1745(2002)050[0293:ATAMOF]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0293:ATAMOF]2.0.CO;2
- Author:
- Van Wychen Lee R.; Luschei Edward C.; Bussan Alvin J.; Maxwell Bruce D.
- Source:
- Weed science 2002 v.50 no.1 pp. 120-129
- ISSN:
- 0043-1745
- Subject:
- Avena fatua; conservation buffers; cost effectiveness; georeferencing; grain crops; inflorescences; oats; pesticide application; seedlings; spring; weed control; weeds
- Abstract:
- ... Managing weed infestations in a spatially precise manner requires accurate and cost-effective weed identification techniques. The goal of our research was to quantify the accuracy of continuous weed presence–absence maps and assess how management based on those maps may affect producer net returns. Each continuous sampled map covered the entire field and contained vector polygons labeled as either ...
- DOI:
- 10.1614/0043-1745(2002)050[0120:AACEOG]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0120:AACEOG]2.0.CO;2
- Author:
- Al-Khatib Kassim; Baumgartner Unland Jolene; Olson Brian L. S.; Graham David W.
- Source:
- Weed science 2002 v.50 no.5 pp. 581-586
- ISSN:
- 0043-1745
- Subject:
- Zea mays; absorption; alachlor; corn; culture media; growth chambers; metabolism; metabolites; metolachlor; root growth; roots; seedling emergence; seedlings; shoots; soil; weed science
- Abstract:
- ... Experiments were conducted in a growth chamber to study alachlor and metolachlor metabolism in soil and corn and to determine if alachlor and metolachlor and their metabolites are exuded from corn roots to the growth medium. Alachlor was more readily absorbed by corn than was metolachlor. The absorption of alachlor and metolachlor was 72 and 55%%, respectively, 10 d after seedling emergence (DAE). ...
- DOI:
- 10.1614/0043-1745(2002)050[0581:AAMTPI]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0581:AAMTPI]2.0.CO;2
- Author:
- Booth Barbara D.; Swanton Clarence J.
- Source:
- Weed science 2002 v.50 no.1 pp. 2-13
- ISSN:
- 0043-1745
- Subject:
- agronomy; community structure; crop rotation; ecologists; filters; tillage; weeds
- Abstract:
- ... Community assembly is a branch of ecology that looks at how communities are assembled as they follow trajectories through time. A trajectory is controlled by biotic and abiotic constraints (filters) that act at multiple scales. From a total species pool, environmental and dispersal constraints control which species enter an ecological species pool. Within this pool, internal dynamics determine whi ...
- DOI:
- 10.1614/0043-1745(2002)050[0002:AIATAT]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0002:AIATAT]2.0.CO;2
- Author:
- Cumming John P.; Doyle Richard B.; Brown Philip H.
- Source:
- Weed science 2002 v.50 no.3 pp. 405-409
- ISSN:
- 0043-1745
- Subject:
- clay; clomazone; crops; desorption; equations; field experimentation; half life; hysteresis; sand; silt; soil types; weed science
- Abstract:
- ... Clomazone dissipation was examined in four soils in field experiments. Field half-lives were 6 to 59 d (average of four field sites was 35 d) for ferrosol (clay loam), kurosol (loamy sand), sodosol (silt loam), and vertosol (light clay). The Hoerl equation provided a better fit to the measured field concentration at all four sites than did a first-order equation. The order of clomazone dissipation ...
- DOI:
- 10.1614/0043-1745(2002)050[0405:CDIFTT]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0405:CDIFTT]2.0.CO;2
- Author:
- White Anthony D.; Owen Micheal D. K.; Hartzler Robert G.; Cardina John
- Source:
- Weed science 2002 v.50 no.4 pp. 432-437
- ISSN:
- 0043-1745
- Subject:
- Helianthus annuus; absorption; acetolactate synthase; application rate; biotypes; chlorimuron; cross resistance; dose response; enzyme activity; enzyme inhibition; imazethapyr; leaves; weed science; South Dakota
- Abstract:
- ... In 1996 a common sunflower population near Howard, SD, was suspected to be cross-resistant to imazethapyr and chlorimuron. Whole-plant acetolactate synthase (ALS) assays confirmed ALS-inhibitor resistance in the Howard biotype. The I₅₀ values (inhibition of 50%% of the enzyme activity) indicated that the resistant population required 39 and 9 times more imazethapyr and chlorimuron, respectively, t ...
- DOI:
- 10.1614/0043-1745(2002)050[0432:CSRTAS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0432:CSRTAS]2.0.CO;2
- Author:
- Rankins Alfred; Shaw David R.; Kingery William L.
- Source:
- Weed science 2002 v.50 no.6 pp. 820-823
- ISSN:
- 0043-1745
- Subject:
- Tripsacum dactyloides; adsorption; binding capacity; desorption; filter strips; fluometuron; organic soils; silty clay soils; soil properties; weed science
- Abstract:
- ... A laboratory experiment was conducted to compare the adsorption and desorption of fluometuron between two soils, one collected from an eastern gamagrass filter strip and the other from a cropped field. Fluometuron adsorption to soil collected from the filter strip was higher than to soil collected from the cropped field. Kd values for fluometuron ranged from 1.9 to 3.6 for soil from a cropped area ...
- DOI:
- 10.1614/0043-1745(2002)050[0820:COFSTS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0820:COFSTS]2.0.CO;2
- Author:
- Chao Wun S.
- Source:
- Weed science 2002 v.50 no.2 pp. 215-226
- ISSN:
- 0043-1745
- Subject:
- restriction fragment length polymorphism; seed dormancy; buds; Euphorbia esula; seeds; loci; amplified fragment length polymorphism; gene expression; dormancy breaking; mutants; mortality; genetic markers; quantitative traits
- Abstract:
- ... Dormancy is a state of shifted physiological activities with cessation of growth. It occurs in seeds and vegetative propagules and enables plants to survive in adverse growing conditions. Traditional studies on dormancy-related problems have mostly focused on hormone changes along with environmental factors that have achieved great insight on these processes at the physiological level. The molecul ...
- Handle:
- 10113/14491
- DOI:
- 10.1614/0043-1745(2002)050[0215:CMTISA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0215:CMTISA]2.0.CO;2
- Author:
- Hartwig Nathan L.; Ammon Hans Ulrich
- Source:
- Weed science 2002 v.50 no.6 pp. 688-699
- ISSN:
- 0043-1745
- Subject:
- Lotus corniculatus; Secale cereale; Securigera varia; Trifolium repens; Vicia villosa; Zea mays; corn; cover crops; crop production; double cropping; erosion control; evaporation; forage; grain crops; growing season; legumes; live mulches; nitrogen; nitrogen fixation; orchards; pest management; planting; relay cropping; runoff; rye; soil erosion; soil organic matter; soil productivity; soil structure; soil temperature; vineyards; weed control; weeds
- Abstract:
- ... Cover crops and living mulches bring many benefits to crop production. Interest in winter annual cover crops such as winter rye and hairy vetch for ground cover and soil erosion control has been increasing in the last 30 yr in some areas. The integration of cover crops into a cropping system by relay cropping, overseeding, interseeding, and double cropping may serve to provide and conserve nitroge ...
- DOI:
- 10.1614/0043-1745(2002)050[0688:AIACCA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0688:AIACCA]2.0.CO;2
- Author:
- Cardina John; Herms Catherine P.; Doohan Douglas J.
- Source:
- Weed science 2002 v.50 no.4 pp. 448-460
- ISSN:
- 0043-1745
- Subject:
- no-tillage; Oxalis; Persicaria pensylvanica; Veronica; Capsella bursa-pastoris; hay; Euphorbia maculata; Setaria faberi; Zea mays; Glycine max; seeds; Chenopodium album; corn; species diversity; weeds; crop rotation; plant communities; oats; herbicides; soybeans; growing season; plows; Avena sativa; Amaranthus retroflexus; crops; Ohio; Pennsylvania
- Abstract:
- ... We characterized the size and species composition of the weed seedbank after 35 yr of continuous crop rotation and tillage system treatments at two locations in Ohio. Spring seedbanks were monitored during 1997, 1998, and 1999 in continuous corn (CCC), corn––soybean (CS), and corn––oats––hay (COH) rotations in moldboard plow (MP), chisel plow (CP), and no-tillage (NT) plots where the same herbicid ...
- DOI:
- 10.1614/0043-1745(2002)050[0448:CRATSE]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0448:CRATSE]2.0.CO;2
11. Differential responses to red clover residue and ammonium nitrate by common bean and wild mustard
- Author:
- Liebman Matt; Gallandt Eric R.
- Source:
- Weed science 2002 v.50 no.4 pp. 521-529
- ISSN:
- 0043-1745
- Subject:
- Phaseolus vulgaris; Sinapis arvensis subsp. arvensis; Trifolium pratense; Triticum aestivum; ammonium nitrate; beans; biomass production; field experimentation; green manures; leaf area; mustard seed; nitrate fertilizers; nitrogen content; phytotoxicity; seed yield; spring wheat; weeds
- Abstract:
- ... Legume green manures have been used for millennia as sources of N for succeeding crops, but they are also sources of phytotoxic compounds that may selectively influence the performance of crop and weed species. To determine whether substitution of legume green manure for synthetic N fertilizer could enhance crop yield while suppressing weed growth, we conducted a field experiment in which common b ...
- DOI:
- 10.1614/0043-1745(2002)050[0521:DRTRCR]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0521:DRTRCR]2.0.CO;2
- Author:
- Isgrigg III John; Yelverton Fred H.; Brownie Cavell; Warren Leon S.
- Source:
- Weed science 2002 v.50 no.1 pp. 86-90
- ISSN:
- 0043-1745
- Subject:
- Poa annua; at-risk population; biotypes; golf courses; growth chambers; oxadiazon; prodiamine; pronamide; resistance management; root growth; shoots; turf management; weed science; North Carolina
- Abstract:
- ... Annual bluegrass control was reduced following 7 yr of continuous fall application of dinitroaniline (DNA) herbicides. Annual bluegrass control was < 40% on two fairways in year eight following prodiamine applied at 1.1 kg ai ha⁻¹. In dose–response studies conducted in growth chambers, this annual bluegrass population exhibited 105-fold resistance in shoot growth to prodiamine compared with a know ...
- DOI:
- 10.1614/0043-1745(2002)050[0086:DRABIN]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0086:DRABIN]2.0.CO;2
- Author:
- Amador-Ramirez Mario D.; Wilson Robert G.; Martin Alex R.
- Source:
- Weed science 2002 v.50 no.3 pp. 370-377
- ISSN:
- 0043-1745
- Subject:
- Amaranthus retroflexus; Chenopodium album; Panicum miliaceum subsp. ruderale; Phaseolus vulgaris; Solanum physalifolium var. nitidibaccatum; Solanum sarrachoides; canopy; disturbed soils; dry beans; equations; ethalfluralin; field experimentation; growing season; heat sums; hoeing; in-row tillage; seedling emergence; seedlings; weeds
- Abstract:
- ... Field experiments were conducted in 1996 and 1997 to evaluate the effect of EPTC (S-ethyl dipropyl carbamothioate) plus ethalfluralin at 2.4 plus 0.83 kg ai ha⁻⁻¹, rotary hoeing, in-row cultivation, rotary hoeing plus in-row cultivation, and dry bean canopy on weed seedling emergence. Cumulative weed emergence in 1996 and 1997 was similar in cropped and noncropped areas. Herbicides were more effec ...
- DOI:
- 10.1614/0043-1745(2002)050[0370:EOIRCH]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0370:EOIRCH]2.0.CO;2
- Author:
- Scursoni Julio A.; Arnold Roberto Benech
- Source:
- Weed science 2002 v.50 no.5 pp. 616-621
- ISSN:
- 0043-1745
- Subject:
- Avena fatua; Hordeum vulgare; Triticum aestivum; barley; diclofop; fecundity; field experimentation; nitrogen fertilizers; oats; population dynamics; seed dispersal; seedling emergence; seedlings; simulation models; sowing; survival rate; tillering; weeds; wheat
- Abstract:
- ... Wild oat is the most important weed in Argentine barley and one of the worst weeds in wheat and barley worldwide. During 1997 and 1998, field experiments were performed to determine the response of wild oat to N fertilizer at planting and at early tillering at 55 kg ha⁻⁻¹ with and without the use of diclofop-methyl. Seedling emergence and survival rate, individual fecundity, and preharvest seed di ...
- DOI:
- 10.1614/0043-1745(2002)050[0616:EONFTO]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0616:EONFTO]2.0.CO;2
- Author:
- Hirase Kangetsu; Molin William T.
- Source:
- Weed science 2002 v.50 no.3 pp. 386-391
- ISSN:
- 0043-1745
- Subject:
- seed germination; interspecific variation; seedling growth; application timing; phytotoxicity; Gossypium hirsutum; Oryza sativa; herbicides; plant characteristics; height; plant density; Sesbania exaltata; application rate; metabolites
- Abstract:
- ... The effects of MT-101 and its herbicidally active form, NOP, on the germination and seedling growth of hemp sesbania and rice were investigated. MT-101 decreased the germination of hemp sesbania by 57 and 90%% at 0.05 and 0.5 mM, respectively, 1 d after treatment (DAT) in petri dishes. The germination, however, recovered such that there was no significant difference between treatments 4 to 6 DAT. ...
- Handle:
- 10113/14485
- DOI:
- 10.1614/0043-1745(2002)050[0386:EOMANO]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0386:EOMANO]2.0.CO;2
- Author:
- Ghorbani R.; Scheepens P. C.; Zweerde W. V. D.; Leifert C.; McDonald A. J. S.; Seel W.
- Source:
- Weed science 2002 v.50 no.5 pp. 628-633
- ISSN:
- 0043-1745
- Subject:
- Ascochyta; Chenopodium album; annual weeds; biological control; crops; fungal spores; greenhouse experimentation; leaf area; leaves; nitrogen; nitrogen content; plant pathogenic fungi; plant tissues; planting; stems; weight loss
- Abstract:
- ... Common lambsquarters is an annual weed of many important crops. Ascochyta caulina is a plant pathogenic fungus that causes necrotic lesions on the leaves and stems of common lambsquarters. The objective of the present study was to estimate the effect of plant N supply on the biocontrol activity of A. caulina isolates against common lambsquarters. In greenhouse experiments replicated groups of comm ...
- DOI:
- 10.1614/0043-1745(2002)050[0628:EONAAS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0628:EONAAS]2.0.CO;2
- Author:
- Watanabe Hajime; Kusagaya Yoshino; Saigusa Masahiko
- Source:
- Weed science 2002 v.50 no.2 pp. 152-156
- ISSN:
- 0043-1745
- Subject:
- eggplants; invasive species; Solanum melongena; seed germination; testa; soil; environmental factors; gibberellins; endosperm; seedling emergence; weed science; field experimentation; dormancy; temperature; hot water treatment; cold; Nicandra physalodes
- Abstract:
- ... Laboratory and field experiments were conducted to determine the effects of several environmental factors on seed germination and seedling emergence of the invasive weed, apple of Peru. The anatomy of the seed was also investigated in this study. The anatomy of the seed is similar to that of an eggplant (Solanum melongena L.) seed. The seed is albuminous, and consists of a seed coat, endosperm, an ...
- DOI:
- 10.1614/0043-1745(2002)050[0152:EFAGOA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0152:EFAGOA]2.0.CO;2
- Author:
- Zhang Wenming; Sulz Michelle; Bailey Karen L.
- Source:
- Weed science 2002 v.50 no.1 pp. 79-85
- ISSN:
- 0043-1745
- Subject:
- Brassica napus; Brassica rapa; Galium aparine; Galium spurium; biopesticides; canola; conidia; cultivars; dew; fungi; host range; seedlings; weed science; Canada
- Abstract:
- ... A new strain of the fungus Plectosporium tabacinum was isolated from naturally-infected false cleavers plants and evaluated as a bioherbicide for the control of both herbicide-resistant and herbicide-susceptible false cleavers in canola. Plectosporium tabacinum was nonpathogenic to both Argentine canola and Polish canola and to both herbicide-tolerant and conventional cultivars. Plectosporium taba ...
- DOI:
- 10.1614/0043-1745(2002)050[0079:EOPTFC]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0079:EOPTFC]2.0.CO;2
- Author:
- Blackshaw Robert E.; Semach Gregory; Janzen H. Henry
- Source:
- Weed science 2002 v.50 no.5 pp. 634-641
- ISSN:
- 0043-1745
- Subject:
- Setaria viridis; Sinapis arvensis subsp. arvensis; Triticum aestivum; ammonium nitrate; application methods; biomass; crop-weed competition; cropping systems; fertilizer application; grain yield; growing season; integrated weed management; nitrogen; nitrogen fertilizers; soil; soil nutrient dynamics; spring; spring wheat; weeds
- Abstract:
- ... Managing fertilizer in cropping systems may be an important component of integrated weed management programs. A field study was conducted to determine the effect of various application methods of the ¹⁵N-enriched nitrogen (N) fertilizer on N uptake in green foxtail, wild mustard, and spring wheat and on crop––weed competition. N application methods consisted of ammonium nitrate in solution applied ...
- DOI:
- 10.1614/0043-1745(2002)050[0634:FAMANU]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0634:FAMANU]2.0.CO;2
- Author:
- Briggs Jeanne A.; Whitwell Ted; Fernandez R. Thomas; Riley Melissa B.
- Source:
- Weed science 2002 v.50 no.4 pp. 536-541
- ISSN:
- 0043-1745
- Subject:
- irrigation; isoxaben; pesticide application; plant nurseries; runoff; trifluralin; weed control
- Abstract:
- ... Sprayable and granular formulations of isoxaben and trifluralin were applied to container plant nursery beds to determine formulation effects on herbicide runoff and weed control. In 1998 herbicide application was followed by 0.8 cm of irrigation delivered in 60 min, and runoff water samples were collected on the day of application (DOA). The highest concentrations of isoxaben and trifluralin dete ...
- DOI:
- 10.1614/0043-1745(2002)050[0536:FEOIAT]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0536:FEOIAT]2.0.CO;2
- Author:
- Stanislaus Marisha A.; Cheng Chi-Lien
- Source:
- Weed science 2002 v.50 no.6 pp. 794-801
- ISSN:
- 0043-1745
- Subject:
- Arabidopsis thaliana; Nicotiana tabacum; cover crops; death; gene expression; genes; heat shock response; herbicides; mutants; progeny; ribonucleases; spring; summer; temperature; tillage; tobacco; toxicity; transgenic plants; translation (genetics); weed science
- Abstract:
- ... The use of winter cover crops is beneficial to agriculture. We have tried to design a cover crop that self-destructs in response to an environmental cue, thereby eliminating the use of herbicides and tillage to remove the cover crop in late spring. Here, this novel concept is tested in a model system. The onset of summer brings with it elevated temperatures. Using this as the environmental cue, a ...
- DOI:
- 10.1614/0043-1745(2002)050[0794:GESDAA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0794:GESDAA]2.0.CO;2
- Author:
- Volenberg Dean S.; Stoltenberg David E.
- Source:
- Weed science 2002 v.50 no.5 pp. 622-627
- ISSN:
- 0043-1745
- Subject:
- Setaria faberi; alleles; flowering; fluazifop-P; gene flow; greenhouse experimentation; greenhouses; herbicide resistance; immigration; outcrossing; parents; phenotype; planting; pollen; weed science
- Abstract:
- ... Gene flow via pollen and inheritance of acetyl-coenzyme A carboxylase (ACCase) inhibitor resistance in giant foxtail have not been previously characterized. Therefore, experiments were conducted to quantify outcrossing rates and flowering periods of giant foxtail accessions resistant or susceptible to ACCase inhibitors and to determine the inheritance pattern of gene(s) that confer resistance. In ...
- DOI:
- 10.1614/0043-1745(2002)050[0622:GFSFOA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0622:GFSFOA]2.0.CO;2
- Author:
- Steinmaus Scott J.; Norris Robert F.
- Source:
- Weed science 2002 v.50 no.1 pp. 42-53
- ISSN:
- 0043-1745
- Subject:
- Abutilon theophrasti; Phaseolus vulgaris; Zea mays; agroecosystems; biomass; branches; branching; canopy; corn; dry matter partitioning; irrigation; kidney beans; leaf area index; leaves; net assimilation rate; seeds; shade; solar radiation; weed science
- Abstract:
- ... Velvetleaf growth and canopy architecture were compared under a range of light conditions representative of competitive and noncompetitive environments typical of irrigated Mediterranean-type agroecosystems. Velvetleaf biomass and seed production exceeded those reported in the literature. Plants grown in full light produced 1,370 g dry weight and 44,200 seeds per plant and showed low relative vari ...
- DOI:
- 10.1614/0043-1745(2002)050[0042:GAACAO]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0042:GAACAO]2.0.CO;2
- Author:
- Murphy Cheryl A.; Lindquist John L.
- Source:
- Weed science 2002 v.50 no.3 pp. 364-369
- ISSN:
- 0043-1745
- Subject:
- Abutilon theophrasti; Zea mays; application rate; corn; crop yield; dicamba; field experimentation; flumiclorac; halosulfuron; integrated weed management; leaf area index; leaves; mechanism of action; mortality; pesticide application; postemergent weed control; weeds
- Abstract:
- ... Knowledge of how reduction in the rate of herbicide application or rotation of their mode of action influences weed growth will provide insight into how successful these practices will be in an integrated weed management program. Field experiments were conducted in 1996 and 1997 to quantify velvetleaf growth response to three postemergence herbicides, each with a different mode of action. A monocu ...
- DOI:
- 10.1614/0043-1745(2002)050[0364:GROVTT]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0364:GROVTT]2.0.CO;2
- Author:
- Wyse-Pester Dawn Y.; Wiles Lori J.; Westra Philip
- Source:
- Weed science 2002 v.50 no.1 pp. 54-63
- ISSN:
- 0043-1745
- Subject:
- Zea mays; irrigation; seedlings; spatial distribution; precision agriculture; plant density; species diversity; weeds; Colorado
- Abstract:
- ... Knowing the distribution of weed seedlings in farmer-managed fields could help researchers develop reliable distribution maps for site-specific weed management. With a knowledge of the spatial arrangement of a weed population, cost effective sampling programs and management strategies can be designed, so inputs can be selected and applied to specific field areas where management is warranted. In 1 ...
- Handle:
- 10113/14505
- DOI:
- 10.1614/0043-1745(2002)050[0054:IASDOW]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0054:IASDOW]2.0.CO;2
- Author:
- Williams Bill J.; Harvey R. Gordon
- Source:
- Weed science 2002 v.50 no.3 pp. 340-343
- ISSN:
- 0043-1745
- Subject:
- Glycine max; Panicum miliaceum subsp. ruderale; Zea mays; buried seeds; corn; field experimentation; seed dispersal; soil; soybeans; spring; weed science
- Abstract:
- ... A field experiment was conducted between 1988 and 1993 to determine the number of wild-proso millet seed that could be returned to the soil without increasing future soil seed bank populations. The first seed bank (1988) was 15,300 seed m⁻⁻² and ranged from 14,000 to 21,000 seed m⁻⁻², which represented a high seed population for the area. Seed rain treatments of 0, 3, 6, 12, 24, and 48%% of the 19 ...
- DOI:
- 10.1614/0043-1745(2002)050[0340:IOSSRO]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0340:IOSSRO]2.0.CO;2
- Author:
- Johnson Bradley C.; Young Bryan G.
- Source:
- Weed science 2002 v.50 no.2 pp. 157-161
- ISSN:
- 0043-1745
- Subject:
- Abutilon theophrasti; Amaranthus tuberculatus; Digitaria sanguinalis; Ipomoea hederacea; Xanthium strumarium; foliar application; greenhouses; mesotrione; regression analysis; relative humidity; temperature; weeds
- Abstract:
- ... Greenhouse studies were conducted to examine the influence of temperature and relative humidity (RH) on the foliar activity of mesotrione on five weed species. Regression analysis was performed allowing for comparison of estimated GR₅₀ (herbicide dose to inhibit growth by 50%%) values for each weed response at either temperature (18 or 32 C) or RH level (30 or 85%%). Temperature and relative humid ...
- DOI:
- 10.1614/0043-1745(2002)050[0157:IOTARH]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0157:IOTARH]2.0.CO;2
28. Integration of Aphthona spp. flea beetles and herbicides for leafy spurge (Euphorbia esula) control
- Author:
- Lym Rodney G.; Nelson Jeffrey A.
- Source:
- Weed science 2002 v.50 no.6 pp. 812-819
- ISSN:
- 0043-1745
- Subject:
- 2,4-D; Aphthona czwalinae; Aphthona lacertosa; Aphthona nigriscutis; Euphorbia esula; adults; biological control; biological control agents; cost effectiveness; managers; picloram; reproduction; weeds
- Abstract:
- ... Neither herbicides nor Aphthona spp. biological control agents provide satisfactory leafy spurge control in all environments where the weed is found. Open-release and caged field studies were conducted to determine the effect of herbicides used in combination with Aphthona spp. flea beetles on both the leafy spurge control and the biological control agent populations. Leafy spurge density was redu ...
- DOI:
- 10.1614/0043-1745(2002)050[0812:IOASFB]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0812:IOASFB]2.0.CO;2
- Author:
- Frantzen Jos; Rossi Federico; Müüller-Schäärer Heinz
- Source:
- Weed science 2002 v.50 no.6 pp. 787-793
- ISSN:
- 0043-1745
- Subject:
- Puccinia; Senecio vulgaris; annual weeds; biological control; chemical control; disease outbreaks; fungi; metoxuron; models; monolinuron; pendimethalin; weed control
- Abstract:
- ... Control of the annual weed, common groundsel, may be troublesome because of insufficient control by herbicides. Biological control based on stimulating epidemics of the rust fungus Puccinia lagenophorae on common groundsel populations may be an alternative to herbicides if the rust fungus can be integrated with the general use of herbicides against other weeds. Formulations of monolinuron, metoxur ...
- DOI:
- 10.1614/0043-1745(2002)050[0787:IOBCOC]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0787:IOBCOC]2.0.CO;2
- Author:
- Baerson Scott R.; Rodriguez Damian J.; Biest Nancy A.; Tran Minhtien; You Jinsong; Kreuger Roger W.; Dill Gerald M.; Pratley James E.; Gruys Kenneth J.
- Source:
- Weed science 2002 v.50 no.6 pp. 721-730
- ISSN:
- 0043-1745
- Subject:
- Lolium rigidum; glyphosate; herbicide-resistant weeds; herbicide resistance; biotypes; lethal dose; gene expression; enzymes; restriction fragment length polymorphism; genetic techniques and protocols; genetic variation; enzyme activity; messenger RNA
- Abstract:
- ... Glyphosate is a broad-spectrum herbicide that has been used extensively for more than 20 yr. The first glyphosate-resistant weed biotype appeared in 1996; it involved a rigid ryegrass population from Australia that exhibited an LD₅₀ value approximately 10-fold higher than that of sensitive biotypes. We have characterized gene expression levels and glyphosate sensitivity of 5-enolpyruvylshikimate 3 ...
- Handle:
- 10113/14497
- DOI:
- 10.1614/0043-1745(2002)050[0721:ITMOGR]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0721:ITMOGR]2.0.CO;2
- Author:
- Duke Stephen O.; Dayan Franck E.; Rimando Agnes M.; Schrader Kevin K.; Aliotta Giovanni; Oliva Anna; Romagni Joanne G.
- Source:
- Weed science 2002 v.50 no.2 pp. 138-151
- ISSN:
- 0043-1745
- Subject:
- mechanism of action; phytotoxins; weed control; fish culture; phytotoxicity; allelochemicals; herbicides; weeds; structure-activity relationships; Cyanobacteria
- Abstract:
- ... Natural products represent a vast repository of materials and compounds with evolved biological activity, including phytotoxicity. Some of these compounds can be used directly or as templates for herbicides. The molecular target sites of these compounds are often unique. Strategies for the discovery of these materials and compounds are outlined. Numerous examples of individual phytotoxins and crud ...
- Handle:
- 10113/14490
- DOI:
- 10.1614/0043-1745(2002)050[0138:IPCFNF]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0138:IPCFNF]2.0.CO;2
- Author:
- Miles Joel E.; Kawabata Osamu; Nishimoto Roy K.
- Source:
- Weed science 2002 v.50 no.1 pp. 64-71
- ISSN:
- 0043-1745
- Subject:
- Cyperus rotundus; confidence interval; polyethylene film; simulation models; soil solarization; soil temperature; spring; summer; tuber sprouting; tubers; weed science; Hawaii
- Abstract:
- ... Sprouting percentage was estimated for purple nutsedge tubers in the field from daily fluctuating soil temperatures. Tuber sprouting under alternating temperatures ranging from 20 to 45 C for 14 d responded quadratically to alternations of high and low temperature. A response surface regression of the cumulative sprouting percentage accounted for 88%% of the variation. The cumulative sprouting per ...
- DOI:
- 10.1614/0043-1745(2002)050[0064:MPNSUS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0064:MPNSUS]2.0.CO;2
- Author:
- Patzoldt William L.; Tranel Patrick J.
- Source:
- Weed science 2002 v.50 no.3 pp. 299-305
- ISSN:
- 0043-1745
- Subject:
- Ambrosia trifida; Arabidopsis thaliana; DNA; acetolactate synthase; alleles; amino acid substitution; chlorimuron; cloransulam; commercialization; cross resistance; imazethapyr; leaves; leucine; tryptophan; weed science; Indiana
- Abstract:
- ... A population of giant ragweed not controlled by cloransulam was identified near Seymour, IN, during the first year of that herbicide's commercialization in 1998. Results from acetolactate synthase (ALS) activity assays performed by Dow AgroSciences showed that resistance was caused by an altered ALS. Studies were conducted to define more precisely the molecular basis of resistance and to determine ...
- DOI:
- 10.1614/0043-1745(2002)050[0299:MAOCRI]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0299:MAOCRI]2.0.CO;2
- Author:
- Chen Tony H. H.; Howe Glenn T.; Bradshaw Jr. Harvey D.
- Source:
- Weed science 2002 v.50 no.2 pp. 232-240
- ISSN:
- 0043-1745
- Subject:
- signal transduction; trees; Populus deltoides subsp. deltoides; genes; heritability; genetic markers; greenhouses; quantitative trait loci; microsatellite repeats; hybrids; amplified fragment length polymorphism; Populus trichocarpa; genotype; leaves; frost injury; chromosome mapping; photoperiod; weed science; overwintering; genetic correlation; breeding; cold treatment; abscisic acid
- Abstract:
- ... We studied the molecular genetics of dormancy-related traits in an F₂ family of poplar (Populus) hybrids derived from a cross between a northern genotype of black cottonwood and a southern genotype of eastern cottonwood by mapping quantitative trait loci (QTLs) and candidate genes. Dormancy-related traits included timing of vegetative bud set, fall frost damage, chilling response, timing of vegeta ...
- DOI:
- 10.1614/0043-1745(2002)050[0232:MGAODR]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0232:MGAODR]2.0.CO;2
- Author:
- Liu Fuhan; O'Connell Neil V.
- Source:
- Weed science 2002 v.50 no.5 pp. 672-676
- ISSN:
- 0043-1745
- Subject:
- Citrus; groundwater contamination; irrigation rates; orchards; rain; rainfall simulation; runoff; simazine; soil; sprinklers; surface water; weed science; California
- Abstract:
- ... In the San Joaquin Valley of California the presence of preemergence herbicides in runoff water from citrus orchards during winter rainfall can cause surface water and groundwater contamination. In 1999 and 2000 this study was conducted in a citrus orchard to evaluate the effect of irrigation incorporation with rotor sprinklers on simazine losses in runoff water. Four treatments included the appli ...
- DOI:
- 10.1614/0043-1745(2002)050[0672:OSMOSA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0672:OSMOSA]2.0.CO;2
- Author:
- Askew Shawn D.; Wilcut John W.
- Source:
- Weed science 2002 v.50 no.3 pp. 357-363
- ISSN:
- 0043-1745
- Subject:
- Gossypium hirsutum; Persicaria lapathifolia; biomass; cotton; fruits; models; plant growth; planting; weeds; North Carolina
- Abstract:
- ... Field studies were conducted at two North Carolina locations to determine the effect of interference between pale smartweed and cotton on plant growth and productivity. Pale smartweed remained shorter than cotton until at least 70 d after cotton planting. However, pale smartweed grew over twice as tall as cotton and produced considerable dry biomass by cotton harvest. Pale smartweed biomass per pl ...
- DOI:
- 10.1614/0043-1745(2002)050[0357:PSIAAP]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0357:PSIAAP]2.0.CO;2
- Author:
- Askew Shawn D.; Wilcut John W.
- Source:
- Weed science 2002 v.50 no.3 pp. 350-356
- ISSN:
- 0043-1745
- Subject:
- plant growth; fruits; lint cotton; Gossypium hirsutum; ferns and fern allies; Persicaria pensylvanica; planting; weeds; biomass; lint yield; Pennsylvania
- Abstract:
- ... Studies were conducted to determine the effect of interference between Pennsylvania smartweed and cotton on plant growth and productivity. Pennsylvania smartweed remained shorter than cotton until at least 80 d after cotton planting. However, Pennsylvania smartweed produced considerable dry biomass by cotton harvest. Pennsylvania smartweed biomass per plant was not affected by weed density when gr ...
- DOI:
- 10.1614/0043-1745(2002)050[0350:PSIAAP]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0350:PSIAAP]2.0.CO;2
- Author:
- Vettakkorumakankav Nataraj N.; Deshpande Satish; Walsh Terry A.; Hall J. Christopher
- Source:
- Weed science 2002 v.50 no.6 pp. 713-720
- ISSN:
- 0043-1745
- Subject:
- 2,4-D; Zea mays; bioassays; clopyralid; corn; developmental stages; dicamba; environmental factors; fluroxypyr; foliar spraying; humidity; light scattering; phytotoxicity; picloram; protoplasts; seeds; spectroscopy; weed science
- Abstract:
- ... The broadleaf auxinic herbicide clopyralid was applied to three varieties of corn (Pioneer 36B08, Pioneer 3730, and Pioneer 3559) to determine whether it was phytotoxic to this crop. The effects of clopyralid on the growth and development of corn were compared with those induced by the auxinic herbicides dicamba, 2,4-D, picloram, and fluroxypyr. When compared with the other auxinic herbicides, clo ...
- DOI:
- 10.1614/0043-1745(2002)050[0713:PEOCOC]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0713:PEOCOC]2.0.CO;2
- Author:
- Murray Bruce G.; Morrison Ian N.; Friesen Lyle F.
- Source:
- Weed science 2002 v.50 no.3 pp. 321-325
- ISSN:
- 0043-1745
- Subject:
- Avena fatua; Linum usitatissimum; Triticum aestivum; acetyl-CoA carboxylase; crops; evolution; field experimentation; flax; gene flow; herbicide resistance; hills; homozygosity; hybrids; oats; outcrossing; planting; pollen; progeny; screening; seeds; sethoxydim; spring wheat; viability; weed science
- Abstract:
- ... Two separate field experiments were conducted to quantify the degree of plant-to-plant outcrossing and pollen-mediated gene flow (PMGF) in wild oat. The purpose of the study was to determine the extent to which pollen movement could contribute to the spread of herbicide resistance in this species. In both experiments, an acetyl-CoA carboxylase inhibitor––resistant (R) wild oat genotype (UM1) was u ...
- DOI:
- 10.1614/0043-1745(2002)050[0321:PMGFIW]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0321:PMGFIW]2.0.CO;2
- Author:
- Jordan Nicholas; Gunsolus Jeffrey; Becker Roger; White Susan
- Source:
- Weed science 2002 v.50 no.5 pp. 547-554
- ISSN:
- 0043-1745
- Subject:
- case studies; global change; guidelines; invasive species; learning; scientists; students; weed control; weeds
- Abstract:
- ... Weed scientists face complex and difficult challenges. Within our discipline, we must increase the sustainability of current weed management approaches and help respond to invasive plants as a component of global change. There also are major challenges that we share with other agricultural disciplines, such as mounting comprehensive efforts to address the problems of current agriculture. We believ ...
- DOI:
- 10.1614/0043-1745(2002)050[0547:PSLWSW]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0547:PSLWSW]2.0.CO;2
- Author:
- Cohn Marc A.
- Source:
- Weed science 2002 v.50 no.2 pp. 261-266
- ISSN:
- 0043-1745
- Subject:
- Oryza sativa; alcohols; carboxylic acids; dormancy breaking; germination; hydrophobicity; metabolic inhibitors; red rice; seed dormancy; weed science
- Abstract:
- ... In many cases, the logical presentation of scientific results masks the actual unfolding of experimental progress. Our work to identify the mechanisms by which chemicals break red rice seed dormancy is presented as an example. Doing the simplest experiments first, allowing the data to drive subsequent work, frequent and aggressive study of published literature, and examination of potentially key f ...
- DOI:
- 10.1614/0043-1745(2002)050[0261:ROIDBC]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0261:ROIDBC]2.0.CO;2
- Author:
- Pline Wendy A.; Viator Ryan; Wilcut John W.; Edmisten Keith L.; Thomas Judith; Wells Randy
- Source:
- Weed science 2002 v.50 no.4 pp. 438-447
- ISSN:
- 0043-1745
- Subject:
- flowering; corolla; vacuoles; stigma; pollen; Agrobacterium; endoplasmic reticulum; Gossypium hirsutum; males; ribosomes; enzyme-linked immunosorbent assay; glyphosate; transmission electron microscopy; females; tissues; leaves; 3-phosphoshikimate 1-carboxyvinyltransferase; herbicide resistance; pollination; weed science; cotton; viability; starch granules
- Abstract:
- ... Glyphosate treatments to glyphosate-resistant (GR) cotton have been associated with poor pollination and increased boll abortion. Anatomical studies were conducted to characterize the effect of glyphosate treatments on the development of male and female reproductive organs of cotton flowers at anthesis. In comparison with nontreated plants, glyphosate applied at both the four-leaf stage postemerge ...
- DOI:
- 10.1614/0043-1745(2002)050[0438:RAIGRC]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0438:RAIGRC]2.0.CO;2
- Author:
- Léégèère Anne; Stevenson F. Craig
- Source:
- Weed science 2002 v.50 no.1 pp. 101-111
- ISSN:
- 0043-1745
- Subject:
- Elymus repens subsp. repens; Euphorbia; Galeopsis tetrahit; Hordeum vulgare; Stellaria media; Thlaspi arvense; Trifolium pratense; Triticum aestivum; broadleaf weeds; crop quality; crop rotation; grain yield; herbicides; legumes; multivariate analysis; plows; residual effects; soil quality; spring barley; spring wheat; tillage; weed control
- Abstract:
- ... Crop rotations, particularly those that include legumes, often result in improved soil quality and crop yields. A study was conducted to confirm the presence and persistence of the residual effects of crop rotation and weed management on a test crop and weeds in three tillage systems (moldboard plow [MP]; chisel plow [CP]; no tillage [NT]). Rotation (spring barley monoculture and spring barley–red ...
- DOI:
- 10.1614/0043-1745(2002)050[0101:REOCRA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0101:REOCRA]2.0.CO;2
- Author:
- Tranel Patrick J.; Wright Terry R.
- Source:
- Weed science 2002 v.50 no.6 pp. 700-712
- ISSN:
- 0043-1745
- Subject:
- acetolactate synthase; amino acids; biotypes; cropping systems; crops; genes; herbicide resistance; herbicides; marketing; point mutation; pollen; population dynamics; scientists; soil; weed control; weeds
- Abstract:
- ... Herbicides that target the enzyme acetolactate synthase (ALS) are among the most widely used in the world. Unfortunately, these herbicides are also notorious for their ability to select resistant (R) weed populations. Now, there are more weed species that are resistant to ALS-inhibiting herbicides than to any other herbicide group. In most cases, resistance to ALS-inhibiting herbicides is caused b ...
- DOI:
- 10.1614/0043-1745(2002)050[0700:RROWTA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0700:RROWTA]2.0.CO;2
- Author:
- Poston Daniel H.; Hirata Cecilia Mucha; Wilson Henry P.
- Source:
- Weed science 2002 v.50 no.3 pp. 306-311
- ISSN:
- 0043-1745
- Subject:
- Amaranthus hybridus; acetolactate synthase; chlorimuron; cross resistance; data collection; enzyme activity; greenhouses; imazethapyr; pyrithiobac; regression analysis; thifensulfuron; weed science
- Abstract:
- ... As a follow-up to greenhouse studies, acetolactate synthase (ALS) (EC 4.1.3.18) was extracted from one imidazolinone (IMI)-susceptible (S) and three IMI-resistant (R1, R2, and R3) smooth pigweed populations, and activity was assayed in the presence of imazethapyr, chlorimuron, thifensulfuron, and pyrithiobac. ALS inhibitor concentrations, required to reduce enzyme activity by a specified percentag ...
- DOI:
- 10.1614/0043-1745(2002)050[0306:ROASFI]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0306:ROASFI]2.0.CO;2
- Author:
- Oswald Andreas; Ransom Joel K.
- Source:
- Weed science 2002 v.50 no.3 pp. 392-396
- ISSN:
- 0043-1745
- Subject:
- Striga hermonthica; Zea mays; biomass; corn; direct seeding; field experimentation; grain yield; harvest index; parasitism; seedlings; weed science
- Abstract:
- ... Striga hermonthica reduces cereal yields in large areas of sub-Saharan Africa. Recent research has shown that transplanting maize seedlings that are more than 15 d old reduced Striga emergence and improved crop yields. Field experiments were conducted in 1998 and 1999 to determine whether maize varieties with different maturity periods and susceptibility to Striga parasitism respond similarly to t ...
- DOI:
- 10.1614/0043-1745(2002)050[0392:ROMVTT]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0392:ROMVTT]2.0.CO;2
- Author:
- Boströöm Ullalena; Fogelfors Hååkan
- Source:
- Weed science 2002 v.50 no.2 pp. 186-195
- ISSN:
- 0043-1745
- Subject:
- Chenopodium album; Erysimum cheiranthoides; Galeopsis; Galium aparine; Lamium; Stellaria media; Viola arvensis; agricultural colleges; annual weeds; crop yield; farmers; field experimentation; grains; guidelines; herbicides; long term effects; pesticide application; plant density; weed control; Sweden
- Abstract:
- ... Today, the aim of weed management is to keep the weed community at an acceptable level rather than to keep the crop totally free of weeds. Satisfactory control of weeds may often be obtained when herbicides are used at lower doses than normally recommended. To facilitate the decision of what is an adequate dose in a specific field, the farmer needs support. In 1988 and 1989, a total of 10 field tr ...
- DOI:
- 10.1614/0043-1745(2002)050[0186:ROWACY]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0186:ROWACY]2.0.CO;2
- Author:
- Cousens Roger D.; Brown Roderick W.; McBratney Alex B.; Whelan Brett; Moerkerk Michael
- Source:
- Weed science 2002 v.50 no.4 pp. 542-546
- ISSN:
- 0043-1745
- Subject:
- Arctotheca calendula; case studies; data collection; geostatistics; kriging; spatial distribution; spraying equipment; surveys; weeds
- Abstract:
- ... Weed maps are typically produced from data sampled at discrete intervals on a regular grid. Errors are expected to occur as data are sampled at increasingly coarse scales. To demonstrate the potential effect of sampling strategy on the quality of weed maps, we analyzed a data set comprising the counts of capeweed in 225,000 quadrats completely covering a 0.9-ha area. The data were subsampled at di ...
- DOI:
- 10.1614/0043-1745(2002)050[0542:SSIIFP]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0542:SSIIFP]2.0.CO;2
49. Seed germination and seedling growth response of selected weedy species to ultraviolet-B radiation
- Author:
- Dai Qiujie; Upadhyaya Mahesh K.
- Source:
- Weed science 2002 v.50 no.5 pp. 611-615
- ISSN:
- 0043-1745
- Subject:
- Bromus tectorum; Erodium cicutarium; Hypochaeris radicata; Setaria viridis; Stellaria media; Taraxacum officinale; biomass; crops; greenhouses; growth retardation; leaf area; leaves; ozonosphere; seed germination; seedling growth; seedlings; shoots; ultraviolet radiation; weed science; Canada
- Abstract:
- ... Ultraviolet-B (UVB, 280 to 320 nm) radiation levels reaching the earth's surface are increasing because of depletion of the stratospheric ozone layer. Adverse biological effects of this harmful radiation are a serious concern. The effects of UVB radiation on spotted chickweed, dandelion, downy brome, green foxtail, redstem filaree, and common catsear seed germination, shoot and radicle elongation, ...
- DOI:
- 10.1614/0043-1745(2002)050[0611:SGASGR]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0611:SGASGR]2.0.CO;2
50. Site of uptake, absorption, translocation, and metabolism of ethofumesate in three turfgrass species
- Author:
- Kohler Eric A.; Branham Bruce E.
- Source:
- Weed science 2002 v.50 no.5 pp. 576-580
- ISSN:
- 0043-1745
- Subject:
- Agrostis stolonifera; Lolium perenne; Poa annua; absorption; color; epinasty; ethofumesate; growth retardation; half life; leaves; metabolism; soil; turf grasses; weed science
- Abstract:
- ... Site of uptake, absorption, translocation, and metabolism of ethofumesate were studied to determine the differential responses of annual bluegrass, creeping bentgrass, and perennial ryegrass. Using barriers to isolate foliage or soil, the primary site of ethofumesate absorption was found to be the foliage. Symptoms resulting from foliar and over-the-top spray applications of ethofumesate to annual ...
- DOI:
- 10.1614/0043-1745(2002)050[0576:SOUATA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0576:SOUATA]2.0.CO;2
- Author:
- Blackshaw Robert E.; Brandt Randall N.; Entz Toby
- Source:
- Weed science 2002 v.50 no.4 pp. 494-497
- ISSN:
- 0043-1745
- Subject:
- Lamium amplexicaule; herbicides; soil temperature; soil water; soil water content; weed science; Canada
- Abstract:
- ... Henbit is increasing in abundance in western Canada, and control recommendations are largely limited to herbicides. Increased knowledge of henbit biology may allow the development of more integrated control programs. A controlled environment study was conducted to determine the combined effect of various soil temperature and soil water levels on the emergence of henbit. Henbit emerged at soil temp ...
- DOI:
- 10.1614/0043-1745(2002)050[0494:STASWE]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0494:STASWE]2.0.CO;2
- Author:
- Liu Zhuojing; Clay Sharon A.; Clay David E.
- Source:
- Weed science 2002 v.50 no.5 pp. 662-671
- ISSN:
- 0043-1745
- Subject:
- Zea mays; alachlor; atrazine; biomass; corn; correlation; half life; landscapes; mineralization; soil heterogeneity; sorption; weed control; weeds; South Dakota
- Abstract:
- ... Landscape-induced differences in soil variability and other parameters have potential effects on herbicide sorption, persistence, degradation, and, ultimately, efficacy. This study examined the spatial variability of herbicide efficacy across an eastern South Dakota field in continuous corn. Atrazine and alachlor had been applied for the previous 10 yr. The spatial variability observed in weed con ...
- DOI:
- 10.1614/0043-1745(2002)050[0662:SVOAAA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0662:SVOAAA]2.0.CO;2
- Author:
- Xue Qingwu; Stougaard Robert N.
- Source:
- Weed science 2002 v.50 no.3 pp. 312-320
- ISSN:
- 0043-1745
- Subject:
- Avena fatua; Triticum aestivum; biomass; crop yield; cropping systems; herbicides; inflorescences; oats; profits and margins; sowing; spring wheat; weed science
- Abstract:
- ... Wild oat continues to reduce spring wheat yields and profits despite the wide spread use of herbicides. Further reductions in the occurrence of wild oat could be achieved with the development of competitive cropping systems. Field studies were conducted to investigate the effects of wheat seed size and seeding rate on wild oat demographic processes under a range of wild oat densities. Spring wheat ...
- DOI:
- 10.1614/0043-1745(2002)050[0312:SWSSAS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0312:SWSSAS]2.0.CO;2
- Author:
- Sugimoto Yukihiro; Ahmed Nafisa E.; Yasuda Norifumi; Inanaga Shinobu
- Source:
- Weed science 2002 v.50 no.5 pp. 658-661
- ISSN:
- 0043-1745
- Subject:
- Fusarium solani; Sorghum bicolor; Striga hermonthica; acetylation; chromatography; fungi; germination; host plants; metabolites; neosolaniol; nuclear magnetic resonance spectroscopy; seedlings; shoots; weed science
- Abstract:
- ... Metabolites of the fungus Fusarium solani (Sud 96) inhibited Striga hermonthica germination induced by the germination stimulant GR24. The active principles were identified as trichothecenes acuminatin, neosolaniol, 8-acetylneosolaniol, and tetraacetoxy T-2 tetraol (neosolaniol diacetate) on the basis of their chromatographic behavior and nuclear magnetic resonance and mass spectra. Inhibitory act ...
- DOI:
- 10.1614/0043-1745(2002)050[0658:TIOSHG]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0658:TIOSHG]2.0.CO;2
- Author:
- Hoffman Melinda L.; Buhler Douglas D.
- Source:
- Weed science 2002 v.50 no.4 pp. 466-472
- ISSN:
- 0043-1745
- Subject:
- Sorghum bicolor subsp. drummondii; Sorghum halepense; annual weeds; crop models; crop-weed competition; experimental design; fertilizers; field capacity; grain sorghum; nitrogen; perennial weeds; planting; potassium nitrate; shoots; soil water
- Abstract:
- ... Application of nitrogen (N) fertilizer to sorghum at planting is a common practice that could confound competitive relationships of the crop with weeds. We studied the competitiveness of grain sorghum (Pioneer Brand 8333) relative to that of the annual weed shattercane and the perennial weed johnsongrass. The taxa are closely related, so survival requirements should be similar thus increasing the ...
- DOI:
- 10.1614/0043-1745(2002)050[0466:USAAFM]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0466:USAAFM]2.0.CO;2
- Author:
- Hoffman Melinda L.; Buhler Douglas D.; Regnier Emilie E.
- Source:
- Weed science 2002 v.50 no.4 pp. 473-478
- ISSN:
- 0043-1745
- Subject:
- Sorghum bicolor subsp. drummondii; annual weeds; bioassays; crop models; crop-weed competition; crops; domestication; grain sorghum; greenhouses; hulling; integrated weed management; leaves; planting; seeds; shoots; vegetative growth
- Abstract:
- ... Interest in using crop competitiveness as an integrated weed management tool is increasing. Our objective was to describe traits that could be sources of the competitiveness we previously observed in grain sorghum grown in association with shattercane, which is a common annual weed and a close relative of the crop. Such information could aid in developing management practices for cultivated sorghu ...
- DOI:
- 10.1614/0043-1745(2002)050[0473:USAAFM]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0473:USAAFM]2.0.CO;2
- Author:
- Kumaratilake Anuja R.; Lorraine-Colwill Debrah F.; Preston Christopher
- Source:
- Weed science 2002 v.50 no.5 pp. 560-566
- ISSN:
- 0043-1745
- Subject:
- Avena sterilis; Lolium rigidum; absorption; environmental factors; glufosinate; glutamate-ammonia ligase; grass weeds; leaves; meristems; metabolism; oats; radiolabeling; thin layer chromatography
- Abstract:
- ... Glufosinate efficacy was examined in two major grass weed species, rigid ryegrass and sterile oat. Dose––response pot experiments under controlled environmental conditions showed that sterile oat was more successfully controlled by glufosinate than was rigid ryegrass. Glutamine synthetase was extracted from both species and assayed in vitro. Glufosinate readily inhibited glutamine synthetase activ ...
- DOI:
- 10.1614/0043-1745(2002)050[0560:ACSOGE]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0560:ACSOGE]2.0.CO;2
- Author:
- Horvath David P.; Anderson James V.
- Source:
- Weed science 2002 v.50 no.2 pp. 227-231
- ISSN:
- 0043-1745
- Subject:
- plant development; buds; Euphorbia esula; complementary DNA; asexual reproduction; adventitious roots; biochemical pathways; gene expression; genes; nucleotide sequences; dormancy
- Abstract:
- ... Leafy spurge is a tenacious perennial weed of the Northern Plains. This plant maintains a perennial growth cycle by controlled production and growth of numerous underground adventitious buds. We are using molecular tools to identify signaling pathways that control underground adventitious bud growth and development in leafy spurge. Toward this end, we have used three techniques to identify genes t ...
- Handle:
- 10113/14492
- DOI:
- 10.1614/0043-1745(2002)050[0227:AMATUR]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0227:AMATUR]2.0.CO;2
- Author:
- Ma Jianyi; Xu Ligen; Wang Shufeng
- Source:
- Weed science 2002 v.50 no.5 pp. 555-559
- ISSN:
- 0043-1745
- Subject:
- Chlorella pyrenoidosa; agrochemicals; cell suspension culture; containers; greenhouses; herbicidal properties; herbicides; mechanism of action; screening; weed science
- Abstract:
- ... Green algal cell suspensions are used in agrochemical research for screening herbicides. This paper reports on the inhibitory effects of 39 herbicides from 19 different chemical classes with nine different modes of action on green algae cultured in liquid media. The results show that herbicide screening using Chlorella as a model organism is simple, quick, and sensitive. In vitro systems can be a ...
- DOI:
- 10.1614/0043-1745(2002)050[0555:AQSAAM]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0555:AQSAAM]2.0.CO;2
- Author:
- Schnick Parry J.; Stewart-Wade Sally M.; Boland Greg J.
- Source:
- Weed science 2002 v.50 no.2 pp. 173-178
- ISSN:
- 0043-1745
- Subject:
- 2,4-D; Hordeum vulgare; Sclerotinia minor; Taraxacum officinale; barley; plant pathogens; weed control
- Abstract:
- ... Integration of two or more methods in a weed control strategy may produce a positive interaction. In this study, sequential applications of sublethal rates of 2,4-D and the plant pathogen Sclerotinia minor were assessed for integrated control of common dandelion. S. minor was prepared as a granular treatment of fungal-colonized barley grits. Treatments of 2,4-D (25 or 50%% of the recommended field ...
- DOI:
- 10.1614/0043-1745(2002)050[0173:DASMTC]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0173:DASMTC]2.0.CO;2
- Author:
- Buhler Douglas D.
- Source:
- Weed science 2002 v.50 no.3 pp. 273-280
- ISSN:
- 0043-1745
- Subject:
- control methods; cropping systems; economic impact; herbicide-resistant weeds; herbicides; integrated weed management; scientists; systems engineering
- Abstract:
- ... Despite several decades of modern weed control practices, weeds continue to be a constant threat to agricultural productivity. Herbicide-resistant weeds and weed population shifts continue to generate new challenges for agriculture. Because of weed community complexity, integrated approaches to weed management may help reduce economic effects and improve weed control practices. Integrated weed man ...
- DOI:
- 10.1614/0043-1745(2002)050[0273:AIAAOF]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0273:AIAAOF]2.0.CO;2
- Author:
- Bradford Kent J.
- Source:
- Weed science 2002 v.50 no.2 pp. 248-260
- ISSN:
- 0043-1745
- Subject:
- after-ripening; environmental factors; mathematical models; phenotype; prediction; seed dormancy; seed germination; seedling emergence; seeds; temperature; water potential; weed control; weeds
- Abstract:
- ... Knowledge and prediction of seasonal weed seedling emergence patterns is useful in weed management programs. Seed dormancy is a major factor influencing the timing of seedling emergence, and once dormancy is broken, environmental conditions determine the rate of germination and seedling emergence. Seed dormancy is a population-based phenomenon, because individual seeds are independently sensing th ...
- DOI:
- 10.1614/0043-1745(2002)050[0248:AOHTTQ]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0248:AOHTTQ]2.0.CO;2
- Author:
- Gronwald John W.; Plaisance Kathryn L.; Ide Donald A.; Wyse Donald L.
- Source:
- Weed science 2002 v.50 no.3 pp. 397-404
- ISSN:
- 0043-1745
- Subject:
- Cirsium arvense; Glycine max; Pseudomonas syringae pv. tagetis; biological control agents; biological control; field experimentation; chlorophyll; leaves; shoots; application rate; application timing; Minnesota
- Abstract:
- ... Growth chamber and field experiments were conducted to assess the potential of Pseudomonas syringae pv. tagetis (Pst) as a biocontrol agent for Canada thistle. Silwet L-77, an organosilicone surfactant, was required to facilitate Pst penetration into Canada thistle leaves. Growth chamber experiments indicated that maximum Pst populations inside leaves were obtained with a Silwet L-77 concentration ...
- Handle:
- 10113/14486
- DOI:
- 10.1614/0043-1745(2002)050[0397:AOPSPT]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0397:AOPSPT]2.0.CO;2
- Author:
- Hager Aaron G.; Wax Loyd M.; Stoller Edward W.; Bollero Germáán A.
- Source:
- Weed science 2002 v.50 no.5 pp. 607-610
- ISSN:
- 0043-1745
- Subject:
- Amaranthus; Glycine max; crop-weed competition; plant development; weed control; field experimentation; duration; leaves; seed productivity; Illinois
- Abstract:
- ... Common waterhemp has become a problem weed species in Midwest soybean production. Determining the critical interference period after soybean and common waterhemp emergence is necessary for the implementation of weed control practices before soybean seed yield loss occurs. Field experiments were conducted during 1996, 1997, and 1998 to determine the influence of duration of common waterhemp interfe ...
- Handle:
- 10113/14489
- DOI:
- 10.1614/0043-1745(2002)050[0607:CWARII]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0607:CWARII]2.0.CO;2
- Author:
- Daugovish Oleg; Thill Donald C.; Shafii Bahman
- Source:
- Weed science 2002 v.50 no.5 pp. 587-594
- ISSN:
- 0043-1745
- Subject:
- Avena fatua; inflorescences; flowering; Brassica napus; intraspecific competition; greenhouses; risk; Sinapis alba; leaves; canola; interspecific competition; weeds; biomass production; alternative crops; canopy; cropland; oats; aboveground biomass; cropping systems; greenhouse experimentation; United States
- Abstract:
- ... Wild oat, a troublesome weed in small grain cereals, infests about 11 million ha of cropland in the United States. Diversifying cereal production with alternative crops, such as yellow mustard and canola, provides flexible cropping systems, decreases production risks, and may allow more effective weed suppression. A greenhouse study was conducted to assess the competitive ability of yellow mustard ...
- DOI:
- 10.1614/0043-1745(2002)050[0587:CBWOAF]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0587:CBWOAF]2.0.CO;2
- Author:
- Knezevic Stevan Z.; Evans Sean P.; Blankenship Erin E.; Van Acker Rene C.; Lindquist John L.
- Source:
- Weed science 2002 v.50 no.6 pp. 773-786
- ISSN:
- 0043-1745
- Subject:
- Glycine max; Zea mays; corn; crops; glyphosate; herbicide resistance; soybeans; weed control; weeds
- Abstract:
- ... The critical period for weed control (CPWC) is a period in the crop growth cycle during which weeds must be controlled to prevent yield losses. Knowing the CPWC is useful in making decisions on the need for and timing of weed control and in achieving efficient herbicide use from both biological and economic perspectives. An increase in the use of herbicide-tolerant crops, especially soybean resist ...
- DOI:
- 10.1614/0043-1745(2002)050[0773:CPFWCT]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0773:CPFWCT]2.0.CO;2
- Author:
- Eyherabide Juan J.; Cendoya Maríía G.
- Source:
- Weed science 2002 v.50 no.2 pp. 162-166
- ISSN:
- 0043-1745
- Subject:
- Glycine max; annual weeds; broadleaf weeds; crop-weed competition; developmental stages; furrows; grasses; soybeans; weed control; Argentina
- Abstract:
- ... Soybean and annual weed competition studies were conducted over 2 yr in Balcarce, Argentina, to define the critical period of weed control and to compare yield losses in soybean, when weeds competed in the total cropping area (row plus furrow) or only in the furrow. In the first year, broad-leaf weeds were more abundant than annual grasses, but in the second year, grasses were more abundant. Criti ...
- DOI:
- 10.1614/0043-1745(2002)050[0162:CPOWCI]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0162:CPOWCI]2.0.CO;2
- Author:
- Hassan Gul; Mueller-Warrant George; Griffith Stephen
- Source:
- Weed science 2002 v.50 no.5 pp. 567-575
- ISSN:
- 0043-1745
- Subject:
- cultivars; application rate; tillering; seedlings; enzyme inhibitors; ligases; seed productivity; herbicide resistance; fenoxaprop; screening; seed set; Lolium multiflorum
- Abstract:
- ... Several seed production fields of the Italian ryegrass cultivar ‘‘Tetrone’’ were destroyed in 1988 by 280 to 350 g ai ha⁻⁻¹ racemic fenoxaprop applied for wild oat control. Because similar rates of fenoxaprop had possessed adequate safety when applied to ‘‘Oregon common’’ Italian ryegrass, suspicion arose that the cultivars differed in tolerance. Seedlings of 21 commonly grown cultivars were scree ...
- Handle:
- 10113/14487
- DOI:
- 10.1614/0043-1745(2002)050[0567:DSOIRL]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0567:DSOIRL]2.0.CO;2
- Author:
- Ugen Michael A.; Wien Hans C.; Wortmann Charles S.
- Source:
- Weed science 2002 v.50 no.4 pp. 530-535
- ISSN:
- 0043-1745
- Subject:
- Bidens pilosa; Galinsoga; Phaseolus vulgaris; Solanum nigrum; annual weeds; crop yield; dry beans; nutrient availability; nutrient uptake; nutrients; pure stands; soil; soil nutrients; Uganda
- Abstract:
- ... Productivity of dry bean is constrained by the competition with weeds for scarce nutrients and water in eastern Africa. Trials were conducted at Cornell University in 1996 and in central Uganda during the two seasons of 1997 to test the hypothesis that bean crop nutrition can be improved while increasing the relative competitiveness of bean with annual weed species. Soil levels of available N, P, ...
- DOI:
- 10.1614/0043-1745(2002)050[0530:DBCWAW]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0530:DBCWAW]2.0.CO;2
- Author:
- Allen Phil S.; Meyer Susan E.
- Source:
- Weed science 2002 v.50 no.2 pp. 241-247
- ISSN:
- 0043-1745
- Subject:
- Bromus tectorum; plant ecology; seed dormancy; seed germination; heritability; population genetics; simulation models; annuals; seed dispersal; after-ripening; water stress; air temperature; genotype-environment interaction
- Abstract:
- ... Downy brome, an obligately selfing winter annual, has invaded a variety of habitats in western North America. Seeds are at least conditionally dormant at dispersal in early summer and lose dormancy through dry after-ripening. In the field, patterns of germination response at dispersal vary among populations and across years within populations. Degree of dormancy at summer temperatures in recently ...
- Handle:
- 10113/14493
- DOI:
- 10.1614/0043-1745(2002)050[0241:EAEGOS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0241:EAEGOS]2.0.CO;2
- Author:
- Clewis Scott B.; Askew Shawn D.; Wilcut John W.
- Source:
- Weed science 2002 v.50 no.3 pp. 378-385
- ISSN:
- 0043-1745
- Subject:
- Arachis hypogaea; Chenopodium album; Cyperus esculentus; Eclipta prostrata; Ipomoea; Sida spinosa; acifluorfen; bentazon; clethodim; conventional tillage; crop yield; cultivars; diclosulam; dimethenamid; economic analysis; flumioxazin; grasses; management systems; peanuts; weed control; weeds; North Carolina
- Abstract:
- ... Experiments were conducted in Lewiston, NC, in 1999 and 2000 and Rocky Mount, NC, in 1999 to evaluate weed management systems in strip- and conventional-tillage peanut. The peanut cultivars grown were ‘‘NC 10C’’, ‘‘NC 12C’’, and ‘‘NC 7’’, respectively. Weed management systems consisted of different combinations of preemergence (PRE) herbicides including diclosulam and flumioxazin plus commercial p ...
- DOI:
- 10.1614/0043-1745(2002)050[0378:EAODAF]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0378:EAODAF]2.0.CO;2
- Author:
- Askew Shawn D.; Bailey William A.; Scott George H.; Wilcut John W.
- Source:
- Weed science 2002 v.50 no.4 pp. 512-520
- ISSN:
- 0043-1745
- Subject:
- Abutilon theophrasti; Amaranthus hybridus; Chenopodium album; Datura stramonium; Digitaria sanguinalis; Eleusine indica; Gossypium hirsutum; Ipomoea hederacea; Ipomoea lacunosa; Ipomoea purpurea; MSMA (herbicide); Senna obtusifolia; Sida spinosa; bromoxynil; costs and returns; cotton; crop yield; cyanazine; fluometuron; genetically modified organisms; glyphosate; growth retardation; herbicide resistance; pendimethalin; pyrithiobac; tillage; weed control
- Abstract:
- ... Studies were conducted to evaluate weed management programs in nontransgenic, bromoxynil-resistant, and glyphosate-resistant cotton in nontilled and tilled environments. Tillage did not affect weed control provided by herbicides. Early-season stunting in nontilled cotton was 3%% regardless of the herbicide system and was no longer evident at midseason. Cotton yield was 10 to 15%% greater, on an av ...
- DOI:
- 10.1614/0043-1745(2002)050[0512:EAOWMF]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0512:EAOWMF]2.0.CO;2
- Author:
- Scott George H.; Askew Shawn D.; Wilcut John W.; Bennett Andrew C.
- Source:
- Weed science 2002 v.50 no.1 pp. 91-100
- ISSN:
- 0043-1745
- Subject:
- Arachis hypogaea; Cyperus esculentus; Digitaria sanguinalis; Ipomoea hederacea; acifluorfen; bentazon; computer software; crop yield; decision support systems; diclosulam; economic analysis; ethalfluralin; flumioxazin; management systems; metolachlor; paraquat; peanuts; pesticide application; weed control; weeds; North Carolina
- Abstract:
- ... Field studies were conducted at four locations in North Carolina in 1998 and 1999 to evaluate a computer program, Herbicide Application Decision Support System (HADSS™™), for weed management in peanut (Arachis hypogaea). Weed management systems included metolachlor or ethalfluralin preplant-incorporated (PPI) used alone or in combination with diclosulam preemergence (PRE) or flumioxazin PRE. These ...
- DOI:
- 10.1614/0043-1745(2002)050[0091:EEOHCP]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0091:EEOHCP]2.0.CO;2
- Author:
- Sunohara Yukari; Ikeda Hiroaki; Tsukagoshi Satoru; Murata Yoshihiro; Sakurai Naoto; Noma Yutaka
- Source:
- Weed science 2002 v.50 no.4 pp. 479-484
- ISSN:
- 0043-1745
- Subject:
- Plantago asiatica; ethephon; ethylene; ethylene production; forbs; inflorescences; leaf blade; petioles; root crown; shoots; trampling damage; weed science
- Abstract:
- ... The effects of simulated trampling on shoot morphology and ethylene production of a trampling-tolerant perennial forb asiatic plantain were investigated. Trampling increased the number of leaves or inflorescences per plant, the petiole diameter, and the leaf blade length to width ratio but decreased the leaf blade width to petiole diameter ratio and the inflorescence length. Ramets subjected to tr ...
- DOI:
- 10.1614/0043-1745(2002)050[0479:EOTOMA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0479:EOTOMA]2.0.CO;2
75. Estimating giant foxtail cohort productivity in soybean based on weed density, leaf area, or volume
- Author:
- Conley Shawn P.; Binning Larry K.; Boerboom Chris M.; Stoltenberg David E.
- Source:
- Weed science 2002 v.50 no.1 pp. 72-78
- ISSN:
- 0043-1745
- Subject:
- Glycine max; Setaria faberi; bioeconomics; biomass; cotyledons; crop yield; developmental stages; fecundity; leaf area; prediction; shoots; soybeans; weed control; weeds
- Abstract:
- ... Understanding weed–crop interactions is critical in predicting crop yield loss, but it is also important to understand how these interactions affect weed productivity. Therefore, research was conducted to characterize the weed relative leaf area and weed relative volume of several giant foxtail cohorts in soybean, and to assess weed density and cohort emergence time, weed relative leaf area, and w ...
- DOI:
- 10.1614/0043-1745(2002)050[0072:EGFCPI]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0072:EGFCPI]2.0.CO;2
- Author:
- Swanton Clarence J.; Shrestha Anil; Clements David R.; Booth Barbara D.; Chandler Kevin
- Source:
- Weed science 2002 v.50 no.4 pp. 504-511
- ISSN:
- 0043-1745
- Subject:
- Glycine max; MCPA (herbicide); MCPB (herbicide); Triticum aestivum; Zea mays; control methods; corn; crop rotation; crop yield; crops; farming systems; glyphosate; growing season; imazethapyr; income; integrated weed management; interrow tillage; linuron; management systems; metolachlor; no-tillage; postemergent weed control; soybeans; weeds; winter wheat; Canada
- Abstract:
- ... A 9-yr (1990––1998) study was conducted at Woodstock, ON, Canada, to evaluate weed densities, crop yields, and gross returns in a modified no-tillage (no primary tillage) corn––soybean––winter wheat rotation under three weed management treatments: (1) minimum, preplant application of glyphosate followed by mechanical control; (2) integrated weed management (IWM), preplant application of glyphosate ...
- DOI:
- 10.1614/0043-1745(2002)050[0504:EOAWMS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0504:EOAWMS]2.0.CO;2
- Author:
- Chandramohan S.; Charudattan R.; Sonoda R. M.; Singh Megh
- Source:
- Weed science 2002 v.50 no.2 pp. 204-213
- ISSN:
- 0043-1745
- Subject:
- Exserohilum; trees; emulsions; fluazifop-P; field experimentation; nutrients; sand; foliar spraying; thiazopyr; disease severity; glyphosate; sethoxydim; norflurazon; Urochloa texana; Citrus; Setaria pumila subsp. pumila; pathogens; Digitaria sanguinalis; grasses; oryzalin; spores; simazine; oxyfluorfen; Drechslera; control methods; diuron; weeds; fruit growing; inoculum; herbicidal properties; experimental design; Cenchrus; Megathyrsus maximus; Sorghum halepense; bromacil; paraquat; Dactyloctenium aegyptium; fungi; Florida
- Abstract:
- ... In citrus, weedy grasses compete for moisture, nutrients, and light and can inhibit the growth of young trees and delay fruit production. These weeds are difficult to control, either because of their tolerance to available herbicides or due to growth habits that enable them to resist other control practices. Control of seven such weedy grasses (southern sandbur, large crabgrass, crowfootgrass, gui ...
- DOI:
- 10.1614/0043-1745(2002)050[0204:FEOAFP]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0204:FEOAFP]2.0.CO;2
- Author:
- Mengistu Lemma W.; Messersmith Calvin G.
- Source:
- Weed science 2002 v.50 no.4 pp. 498-503
- ISSN:
- 0043-1745
- Subject:
- Bassia scoparia; cropping sequence; gene flow; genes; genetic variation; herbicides; variance; weed science
- Abstract:
- ... Genetic diversity of kochia was determined using 45 polymorphic intersimple sequence repeat markers. Comparisons of genetic diversity within and among populations were made after structuring 453 kochia plants into samples representing 13 populations on the basis of the collection site and into two sample groups on the basis of the cropping history and geographic region of the sites. Mean Nei's gen ...
- DOI:
- 10.1614/0043-1745(2002)050[0498:GDOK]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0498:GDOK]2.0.CO;2
- Author:
- Hellwig Kaleb B.; Johnson William G.; Scharf Peter C.
- Source:
- Weed science 2002 v.50 no.6 pp. 757-762
- ISSN:
- 0043-1745
- Subject:
- Digitaria sanguinalis; Echinochloa crus-galli; Setaria faberi; Zea mays; ammonium nitrate; biomass; broadleaf weeds; corn; crop yield; glyphosate; grass weeds; grasses; growing season; harvest date; nitrogen; nitrogen content; nitrogen fertilizers; no-tillage; planting; soil; vegetation; Missouri
- Abstract:
- ... No-tillage field studies were conducted in 1999 and 2000 at Columbia, MO, to determine the interaction of grass weed interference and side-dressed N fertilization on corn and weed growth, corn yield, and the N content of the soil and plant biomass at various intervals early in the growing season and at harvest. Ammonium nitrate (112 kg N ha⁻⁻¹) was applied before planting. A herbicide was applied ...
- DOI:
- 10.1614/0043-1745(2002)050[0757:GWIANA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0757:GWIANA]2.0.CO;2
- Author:
- Poston Daniel H.; Wilson Henry P.; Hines Thomas E.
- Source:
- Weed science 2002 v.50 no.4 pp. 485-493
- ISSN:
- 0043-1745
- Subject:
- Amaranthus hybridus; biomass production; biotypes; chlorophyll; greenhouses; leaf area; leaves; plant tissues; seedlings; vegetative growth; weed science
- Abstract:
- ... Greenhouse and field studies were conducted in 1998 and 1999 to compare the growth and development of one imidazolinone-susceptible (S) and four -resistant (R1, R2, R3, and R4) smooth pigweed biotypes under noncompetitive and competitive conditions. Under noncompetitive conditions in the greenhouse, S plants accumulated biomass, grew faster during early seedling development, and accumulated leaf a ...
- DOI:
- 10.1614/0043-1745(2002)050[0485:GADOIR]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0485:GADOIR]2.0.CO;2
- Author:
- Norsworthy Jason K.; Oliver Lawrence R.
- Source:
- Weed science 2002 v.50 no.1 pp. 34-41
- ISSN:
- 0043-1745
- Subject:
- Glycine max; Sesbania exaltata; buried seeds; developmental stages; field experimentation; glyphosate; hemp; herbicide resistance; planting; seed yield; sowing; soybeans; weed control; weeds; Arkansas
- Abstract:
- ... Field experiments were conducted at Fayetteville, AR, in 1997, 1998, and 1999 to evaluate the degree of interspecific interference between drill-seeded, glyphosate-resistant soybean and hemp sesbania as influenced by soybean population, hemp sesbania density, and a single glyphosate application. Soybean was planted at 247,000, 430,000, and 618,000 seed ha⁻⁻¹ with early-season emergence of 217,000, ...
- DOI:
- 10.1614/0043-1745(2002)050[0034:HSIIDS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0034:HSIIDS]2.0.CO;2
- Author:
- Tworkoski Thomas
- Source:
- Weed science 2002 v.50 no.4 pp. 425-431
- ISSN:
- 0043-1745
- Subject:
- mechanism of action; interspecific variation; adjuvants; Satureja hortensis; phytotoxicity; electrolytes; Chenopodium album; essential oils; herbicides; plant fats and oils; Ambrosia artemisiifolia; Syzygium aromaticum; Taraxacum officinale; Thymus vulgaris; apoptosis; leaves; Cinnamomum verum
- Abstract:
- ... Laboratory and greenhouse experiments were conducted to determine the herbicidal effect of plant-derived oils and to identify the active ingredient in an oil with herbicide activity. Twenty-five different oils were applied to detached leaves of dandelion in the laboratory. Essential oils (1%%, v/v) from red thyme, summer savory, cinnamon, and clove were the most phytotoxic and caused electrolyte l ...
- Handle:
- 10113/14483
- DOI:
- 10.1614/0043-1745(2002)050[0425:HEOEO]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0425:HEOEO]2.0.CO;2
- Author:
- Gealy David R.; Tai Thomas H.; Sneller Clay H.
- Source:
- Weed science 2002 v.50 no.3 pp. 333-339
- ISSN:
- 0043-1745
- Subject:
- Oryza sativa; hybridization; genetic markers; microsatellite repeats; outcrossing; genetic variation; cultivars
- Abstract:
- ... Red rice is a major weed in rice production in the southern United States. Red rice and rice intercross because they are the same species. Our objectives were to determine the genetic diversity represented by accessions of red rice and to identify DNA markers that might be useful in identifying hybrids between red and cultivated rice. Red rice accessions were collected from Arkansas and other rice ...
- Handle:
- 10113/14298
- DOI:
- 10.1614/0043-1745(2002)050[0333:IORRRA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0333:IORRRA]2.0.CO;2
- Author:
- Morrison Laura A.; Créémieux Lisèèle C.; Mallory-Smith Carol A.
- Source:
- Weed science 2002 v.50 no.6 pp. 737-747
- ISSN:
- 0043-1745
- Subject:
- Aegilops cylindrica; Triticum aestivum; backcrossing; females; gene flow; hybridization; hybrids; observational studies; parentage; risk assessment; roads; spring; summer; surveys; weeds; winter wheat; Oregon
- Abstract:
- ... A survey conducted in a seven-county region of eastern Oregon during the summers of 1998, 1999, and 2000 characterized the occurrence of jointed goatgrass ×× wheat hybrids and the features of weed infestations promoting hybridization. During the survey, 93 infested sites were visited with jointed goatgrass collected from 57 sites and hybrids collected from 45 sites. Thirteen collection sites were ...
- DOI:
- 10.1614/0043-1745(2002)050[0737:IOJGAC]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0737:IOJGAC]2.0.CO;2
- Author:
- Burks T. F.; Shearer S. A.; Green J. D.; Heath J. R.
- Source:
- Weed science 2002 v.50 no.6 pp. 802-811
- ISSN:
- 0043-1745
- Subject:
- Abutilon theophrasti; Digitaria sanguinalis; Ipomoea hederacea; Setaria faberi; algorithms; application methods; color; computer vision; digital images; discriminant analysis; image analysis; pesticide application; precision agriculture; soil; texture; weed control; weeds
- Abstract:
- ... The environmental effect of weed control systems has stimulated research into new practices for weed control, such as selective herbicide application methods on weed-infested crop areas. This research used the color co-occurrence method (CCM) texture analysis to determine the effects of plant maturity on the accuracy of weed species classification of digitized images. Two different experimental co ...
- DOI:
- 10.1614/0043-1745(2002)050[0802:IOWMLO]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0802:IOWMLO]2.0.CO;2
- Author:
- Blackshaw Robert E.; Lemerle Deirdre; Mailer Rodney; Young Ken R.
- Source:
- Weed science 2002 v.50 no.3 pp. 344-349
- ISSN:
- 0043-1745
- Subject:
- Brassica napus; Raphanus raphanistrum; annual weeds; canola; crop yield; development aid; erucic acid; field experimentation; glucosinolates; growers; radishes; New South Wales
- Abstract:
- ... Wild radish is a prevalent annual weed throughout the cropping regions of southern Australia. Field experiments were conducted at Wagga Wagga, New South Wales, in 1998 and 1999 to determine the effect of various densities and emergence times of wild radish on yield and quality of canola and on wild radish seed production. As few as 4 wild radish m⁻⁻² emerging with canola reduced canola yield 9 to ...
- DOI:
- 10.1614/0043-1745(2002)050[0344:IOWROY]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0344:IOWROY]2.0.CO;2
- Author:
- Volenberg Dean S.; Stoltenberg David E.
- Source:
- Weed science 2002 v.50 no.6 pp. 731-736
- ISSN:
- 0043-1745
- Subject:
- Solanum nigrum; Solanum ptycanthum; acetolactate synthase; alleles; apical meristems; backcrossing; biomass; imazethapyr; leaves; necrosis; phenotype; progeny; reciprocal crosses; shoots; weed science; Wisconsin
- Abstract:
- ... Experiments were conducted to determine the inheritance of resistance in a Wisconsin accession of eastern black nightshade to acetolactate synthase (ALS) inhibitors. ALS-inhibitor––susceptible (S) and ALS-inhibitor––resistant (R) plants were crossed (S ×× R), and inheritance was characterized in F₁ and F₂ generations. Inheritance was characterized further in progeny of reciprocal crosses (R ×× S) ...
- DOI:
- 10.1614/0043-1745(2002)050[0731:IORIEB]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0731:IORIEB]2.0.CO;2
- Author:
- Kyser Guy B.; DiTomaso Joseph M.
- Source:
- Weed science 2002 v.50 no.5 pp. 648-657
- ISSN:
- 0043-1745
- Subject:
- Centaurea solstitialis; annual grasslands; forbs; grasses; herbicides; indigenous species; land restoration; plant communities; prescribed burning; seedlings; species diversity; summer; weed science; California
- Abstract:
- ... An open grassland at Sugarloaf Ridge State Park, Sonoma County, CA, was burned during three consecutive summers (1993––1995) to control yellow starthistle. By 1996, the yellow starthistle seedbank, seedling density, and mature vegetative cover were reduced by 99, 99, and 91%%, respectively, and the plant community had greater diversity and species richness, particularly of native forbs. After the ...
- DOI:
- 10.1614/0043-1745(2002)050[0648:IIAGCA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0648:IIAGCA]2.0.CO;2
- Author:
- Eleftherohorinos Ilias G.; Dhima Kico V.; Vasilakoglou Ioannis B.
- Source:
- Weed science 2002 v.50 no.2 pp. 167-172
- ISSN:
- 0043-1745
- Subject:
- Oryza sativa; cultivars; grain yield; inflorescences; nitrogen; nitrogen fertilizers; red rice; weed science; yield components; Greece
- Abstract:
- ... Field studies were conducted in northern Greece, in 1997 and 1998, to investigate the effect of nitrogen fertilization and red rice density on interference between red rice and two rice cultivars (Thaibonnet, Ariette). Interference between rice and red rice began 3 wk after rice emergence, but was not affected by the increasing nitrogen rate from 100 to 150 kg N ha––¹. Dry weight of both rice cult ...
- DOI:
- 10.1614/0043-1745(2002)050[0167:IORRIR]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0167:IORRIR]2.0.CO;2
- Author:
- Askew Shawn D.; Wilcut John W.
- Source:
- Weed science 2002 v.50 no.3 pp. 326-332
- ISSN:
- 0043-1745
- Subject:
- plant growth; lint cotton; Gossypium hirsutum; models; plant density; Persicaria maculosa; planting; weeds; biomass; lint yield
- Abstract:
- ... Studies were conducted to determine the effect of interference between ladysthumb and cotton on plant growth and productivity. Ladysthumb remained shorter than cotton until at least 70 d after cotton planting. However, ladysthumb grew over twice as tall as cotton and, depending on plant density, produced between 179 and 681 g dry biomass per plant by cotton harvest. Ladysthumb biomass per plant wa ...
- DOI:
- 10.1614/0043-1745(2002)050[0326:LIASPI]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0326:LIASPI]2.0.CO;2
- Author:
- Boströöm Ullalena; Fogelfors Hååkan
- Source:
- Weed science 2002 v.50 no.2 pp. 196-203
- ISSN:
- 0043-1745
- Subject:
- Hordeum vulgare subsp. vulgare; agrochemicals; field experimentation; grain yield; herbicides; integrated weed management; long term effects; pesticide application; spring barley; weeds; Sweden
- Abstract:
- ... Different herbicide-application strategies may serve as part of an integrated weed management (IWM) system. In 1987 and 1988, ten field trials were initiated in the south-central part of Sweden, with the objective of studying the long-term effects of herbicide-application strategies on the development of weed populations and productivity of spring-sown cereals. Each year until 1997, herbicides wer ...
- DOI:
- 10.1614/0043-1745(2002)050[0196:LTEOHA]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0196:LTEOHA]2.0.CO;2
- Author:
- Manley Brian S.; Wilson Henry P.; Hines Thomas E.
- Source:
- Weed science 2002 v.50 no.1 pp. 112-119
- ISSN:
- 0043-1745
- Subject:
- Cyperus esculentus; Digitaria ischaemum; Digitaria sanguinalis; Eragrostis cilianensis; Glycine max; Panicum dichotomiflorum; Solanum lycopersicum var. lycopersicum; Zea mays; acetolactate synthase; atrazine; butylate; corn; crop rotation; fenoxaprop; fluazifop-P; fomesafen; grass weeds; grasses; imazaquin; imazethapyr; nicosulfuron; pesticide application; soybeans; tomatoes
- Abstract:
- ... The effects of several crop rotations and herbicide programs on populations of goosegrass, stinkgrass, large crabgrass, smooth crabgrass, fall panicum, and yellow nutsedge were investigated at two sites from 1991 to 1994. Crop rotations were continuous corn, continuous soybean, corn–soybean, and corn–tomato–soybean. Herbicide programs were the split-plots and included continuous use of acetolactat ...
- DOI:
- 10.1614/0043-1745(2002)050[0112:MPACRI]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0112:MPACRI]2.0.CO;2
- Author:
- Mercer Kristin L.; Jordan Nicholas R.; Wyse Donald L.; Shaw Ruth G.
- Source:
- Weed science 2002 v.50 no.5 pp. 677-685
- ISSN:
- 0043-1745
- Subject:
- Avena sativa; Elymus repens subsp. repens; Glycine max; Zea mays; arable soils; control methods; corn; evolution; farming systems; genetic variation; hay; oats; pastures; perennials; principal component analysis; risk; soybeans; weed control; weeds; Minnesota
- Abstract:
- ... The genetic variation of quackgrass as a species and the array of environments in which it is found indicate that selection in these different environments could lead to differentiation among quackgrass populations. Yet, a highly diverse environment might not promote the genetic divergence of quackgrass if it poses contradictory selection pressures. To assess the extent of divergence among quackgr ...
- DOI:
- 10.1614/0043-1745(2002)050[0677:MDOQER]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0677:MDOQER]2.0.CO;2
- Author:
- Norsworthy Jason K.; Oliver Lawrence R.
- Source:
- Weed science 2002 v.50 no.1 pp. 26-33
- ISSN:
- 0043-1745
- Subject:
- Glycine max; Ipomoea lacunosa; field experimentation; glyphosate; heat sums; herbicide resistance; leaf area index; photosynthesis; seed yield; seeds; shade; sowing; soybeans; weed science
- Abstract:
- ... Field experiments were conducted from 1997 through 1999 to evaluate interspecific interference between pitted morningglory at 0, 10, 16, and 62 plants m⁻⁻² and drill-seeded, glyphosate-resistant soybean as influenced by soybean population and a single glyphosate application of 1.12 kg ai ha⁻⁻¹. Photosynthetic rate of soybean was not influenced by pitted morningglory density or glyphosate use 2 wk ...
- DOI:
- 10.1614/0043-1745(2002)050[0026:PMIIDS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0026:PMIIDS]2.0.CO;2
- Author:
- Zimdahl Robert L.
- Source:
- Weed science 2002 v.50 no.1 pp. 14-25
- ISSN:
- 0043-1745
- Subject:
- education; herbicides; plant protection; weed science
- Abstract:
- ... This paper is a review of and a commentary on the published addresses of WSSA presidents from the founding of the Society through 2000. The paper's assumptions are that the presidential remarks will reveal what the Society has emphasized, what its major concerns and goals have been, and how the presidents have addressed what they considered to be important issues. Seven issues have been addressed ...
- DOI:
- 10.1614/0043-1745(2002)050[0014:TPS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0014:TPS]2.0.CO;2
- Author:
- Lawlor Frances M.; Raynal Dudley J.
- Source:
- Weed science 2002 v.50 no.2 pp. 179-185
- ISSN:
- 0043-1745
- Subject:
- Asclepias; Vincetoxicum rossicum; calcareous soils; foliar spraying; glyphosate; introduced plants; plantations; triclopyr; weed science; Great Lakes
- Abstract:
- ... The exotic plant, swallow-wort, a twining perennial of the Milkweed family, has become increasingly invasive in natural areas, successional old fields, and tree plantations on calcareous soils of the lower Great Lakes basin. Because mechanical control strategies are inadequate, swallow-wort's response in natural areas to foliar spray and cut-stem applications of glyphosate and triclopyr was evalua ...
- DOI:
- 10.1614/0043-1745(2002)050[0179:ROSWTH]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0179:ROSWTH]2.0.CO;2
- Author:
- Kenkel N. C.; Derksen D. A.; Thomas A. G.; Watson P. R.
- Source:
- Weed science 2002 v.50 no.3 pp. 281-292
- ISSN:
- 0043-1745
- Subject:
- data collection; discriminant analysis; models; multivariate analysis; soil; weeds
- Abstract:
- ... Data containing many variables are often collected in weed science research, but until recently few weed scientists have used multivariate statistical methods to examine such data. Multivariate analysis can be used for both descriptive and predictive modeling. This paper provides an intuitive geometric introduction to the more commonly used and relevant multivariate methods in weed science researc ...
- DOI:
- 10.1614/0043-1745(2002)050[0281:RMAIWS]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0281:RMAIWS]2.0.CO;2
- Author:
- Wiles L.; Schweizer E.
- Source:
- Weed science 2002 v.50 no.5 pp. 595-606
- ISSN:
- 0043-1745
- Subject:
- weeds; botanical composition; density; spatial distribution; sampling; prediction; corn; fields; spatial variation; Colorado
- Abstract:
- ... Weed management could be more efficient and require less herbicide if growers could afford to estimate the composition, density, and distribution of weed seed banks. Spatial distribution of a weed seed bank will affect the accuracy of both mean estimates and interpolated maps of density. Consequently, information about the general characteristics of spatial distributions of seeds in a seed bank is ...
- Handle:
- 10113/14488
- DOI:
- 10.1614/0043-1745(2002)050[0595:SDOWSB]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0595:SDOWSB]2.0.CO;2
- Author:
- Walenta Darrin L.; Yenish Joseph P.; Young Frank L.; Ball Daniel A.
- Source:
- Weed science 2002 v.50 no.4 pp. 461-465
- ISSN:
- 0043-1745
- Subject:
- interspecific variation; inflorescences; weed control; seasonal variation; Triticum aestivum; Aegilops cylindrica; sexual reproduction; duration; seed productivity; crop rotation; vernalization; Oregon
- Abstract:
- ... Jointed goatgrass is most commonly described as a winter annual species. However, it has been observed to produce spikes in spring crops, apparently without being exposed to vernalizing conditions. A controlled environment study was conducted to determine the reproductive response of jointed goatgrass plants grown from seeds of fall- and spring-emerging parent plants to various vernalization durat ...
- Handle:
- 10113/14484
- DOI:
- 10.1614/0043-1745(2002)050[0461:VROPGF]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0461:VROPGF]2.0.CO;2
- Author:
- Wilkerson Gail G.; Wiles Lori J.; Bennett Andrew C.
- Source:
- Weed science 2002 v.50 no.4 pp. 411-424
- ISSN:
- 0043-1745
- Subject:
- weeds; weed control; decision making; integrated pest management; Internet; surveys; crop-weed competition; guidelines; herbicide resistance; growth models; simulation models; world wide web
- Abstract:
- ... The use of scouting and economic thresholds has not been accepted as readily for managing weeds as it has been for insects, but the economic threshold concept is the basis of most weed management decision models available to growers. A World Wide Web survey was conducted to investigate perceptions of weed science professionals regarding the value of these models. Over half of the 56 respondents we ...
- Handle:
- 10113/14482
- DOI:
- 10.1614/0043-1745(2002)050[0411:WMDMPP]2.0.CO;2
- https://doi.org/10.1614/0043-1745(2002)050[0411:WMDMPP]2.0.CO;2