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You searched for: Publication Year 2002 Remove constraint Publication Year: 2002 Subject Amaranthus retroflexus Remove constraint Subject: Amaranthus retroflexus Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
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1. Crop rotation and tillage system effects on weed seedbanks

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

2. Development of Redroot Pigweed Is Influenced by Light Spectral Quality and Quantity

Author:
Irena Rajcan; Majid AghaAlikhani; Clarence J. Swanton; Matthijs Tollenaar
Source:
Crop science 2002 v.42 no.6 pp. 1930-1936
ISSN:
0011-183X
Subject:
Amaranthus retroflexus; canopy; dry matter accumulation; flowering; leaves; light quality; phenology; photons; photoperiod; photosynthesis; plant height; seed set; weeds
Abstract:
... Light quantity (photosynthetic photon flux density, PPFD) and quality (red:far-red ratio, R:FR) may affect phenological development of weed species growing under a crop canopy. An indoor study was conducted to quantify the effects of incident PPFD and R:FR on development and dry matter accumulation of redroot pigweed (Amaranthus retroflexus L.). Pigweed was grown in growth cabinets from the one-le ...
DOI:
10.2135/cropsci2002.1930

3. Development of redroot pigweed is influenced by light spectral quality and quantity

Author:
Rajcan, I.; AghaAlikhani, M.; Swanton, C.J.; Tollenaar, M.
Source:
Crop science 2002 v.42 no.6 pp. 1930-1936
ISSN:
1435-0653
Subject:
far-red light; plant development; stems; phenology; light intensity; weeds; red light; Amaranthus retroflexus; wavelengths; dry matter partitioning
Abstract:
... Light quantity (photosynthetic photon flux density, PPFD) and quality (red:far-red ratio, R:FR) may affect phenological development of weed species growing under a crop canopy. An indoor study was conducted to quantify the effects of incident PPFD and R:FR on development and dry matter accumulation of redroot pigweed (Amaranthus retroflexus L.). Pigweed was grown in growth cabinets from the one-le ...

4. Differential susceptibility of agricultural weeds to ultraviolet-B radiation

Author:
Furness, N.H.; Upadhyaya, M.K.
Source:
Canadian journal of plant science 2002 v.82 no.4 pp. 789-796
ISSN:
0008-4220
Subject:
seedling growth; greenhouses; tillering; Capsella bursa-pastoris; Chenopodium album; seedlings; shoots; Setaria viridis; leaf area; scanning electron microscopy; Persicaria maculosa; Amaranthus retroflexus; weeds; biomass; ultraviolet radiation; Stellaria media; leaves; crops
Abstract:
... Differential morphological sensitivity of weed species to ultraviolet-B (UV-B) radiation (290-320 nm) may alter competitive relationships among weeds and associated crop species as the level of this radiation changes. In order to determine relative sensitivity of common chickweed [Stellaria media (L.) Vill.], green foxtail (Setaria viridis L.), lady's-thumb (Polygonum persicaria L.), lamb's-quarte ...
DOI:
10.4141/P01-174

5. Effect of in-row cultivation, herbicides, and dry bean canopy on weed seedling emergence

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

6. Identification of ALS inhibitor-resistant Amaranthus biotypes using polymerase chain reaction amplification of specific alleles

Author:
Wagner, J.; Haas, H.U.; Hurle, K.
Source:
Weed research 2002 v.42 no.4 pp. 280-286
ISSN:
0043-1737
Subject:
Amaranthus retroflexus; herbicide resistance; herbicide-resistant weeds; mechanism of action; acetolactate synthase; polymerase chain reaction; biotypes; genetic markers; detection; alleles; nucleotide sequences; amino acid sequences; mutation
DOI:
10.1046/j.1365-3180.2002.00285.x

7. Investigation of spray application of microbial herbicides using Alternaria alternata on Amaranthus retroflexus

Author:
Lawrie, J.; Greaves, M.P.; Down, V.M.; Western, N.M.; Jaques, S.J.
Source:
Biocontrol science and technology 2002 v.12 no.4 pp. 469-479
ISSN:
0958-3157
Subject:
Amaranthus retroflexus; Alternaria alternata; biological control; spraying; spatial distribution; conidia; volume; spore germination; leaves
Abstract:
... Inclusion of Alternaria alternata conidia in a spray formulation affected the distribution pattern on the target. The dry weight of Amaranthus retroflexus plants was reduced by more than 83% when A. alternata conidia (10(7) ml(-1)) were applied at 200 L ha(-1) or greater and when given a 24 h dew period. At low application volumes (25 or 50 L ha(-1)) plant dry weight was reduced by only 29 or 54%. ...
DOI:
10.1080/09583150220146086

8. On the mechanism of selectivity of the corn herbicide BAS 662H: a combination of the novel auxin transport inhibitor diflufenzopyr and the auxin herbicide dicamba

Author:
Grossmann, Klaus; Caspar, Gunter; Kwiatkowski, Jacek; Bowe, Steven J.
Source:
Pest management science 2002 v.58 no.10 pp. 1002-1014
ISSN:
1526-498X
Subject:
Amaranthus retroflexus; Galium aparine; Zea mays; abscisic acid; broadleaf weeds; corn; dicamba; diflufenzopyr; ethylene production; foliar uptake; growth retardation; herbicidal properties; hydrogen peroxide; metabolism; naphthaleneacetic acid; picloram; quinclorac; shoots; weed control
Abstract:
... BAS 662H, a 1:2.5 combination of the semicarbazone-type auxin transport inhibitor diflufenzopyr and the auxin herbicide dicamba, is used as a post-emergence herbicide in corn. The combination has been observed to provide more effective broadleaf weed control and improved tolerance in corn than typical rates of dicamba used alone. In order to analyze this phenomenon, the uptake, translocation, meta ...
DOI:
10.1002/ps.549

9. Outdoor studies of the efficacy of Alternaria alternata in controlling Amaranthus retroflexus

Author:
Lawrie, J.; Greaves, M.P.; Down, V.M.; Morales-Aza, B.; Lewis, J.M.
Source:
Biocontrol science and technology 2002 v.12 no.1 pp. 83-94
ISSN:
0958-3157
Subject:
Amaranthus retroflexus; weed control; Alternaria alternata; biological control; conidia; weight; mortality; Triticum aestivum; leaves; viability; spore germination; crop-weed competition; microclimate; application rate; mycoherbicides; biomass production
Abstract:
... Application of 250 L ha-1 containing 10(7) Alternaria alternata conidia ml-1 caused 61% reduction in dry weight and a 45% mortality in Amaranthus retroflexus plants growing in a wheat crop. However, only 10-20% of the applied conidia were retained on the leaf. In one experiment, conidia remained viable for 4 days on the leaf surface until conditions were favourable for germination. Competition fro ...
DOI:
10.1080/09583150120110671

10. Studies of spray application of microbial herbicides in relation to conidial propagule content of spray droplets and retention on target

Author:
Lawrie, J.; Greaves, M.P.; Down, V.M.; Western, N.M.
Source:
Biocontrol science and technology 2002 v.12 no.1 pp. 107-119
ISSN:
0958-3157
Subject:
Amaranthus retroflexus; spraying; conidia; droplets; hypocotyls; developmental stages; nozzles; inoculum density; mycelium; crops; canopy; mycoherbicides
Abstract:
... This paper addresses the hypothesis that the spray application system used will affect the retention of spray deposits of microbial herbicides on different plant structures. There was greater spray retention on the hypocotyl of 4 to 6-true leaf Amaranthus retroflexus plants (20-31%) sprayed with an aerosol-producing laboratory sprayer than with a hydraulic nozzle (3-5%). Spray deposition and reten ...
DOI:
10.1080/09583150120110699

11. Uptake of Cesium-137 and Strontium-90 from Contaminated Soil by Three Plant Species; Application to Phytoremediation

Author:
Mark Fuhrmann; Mitch M. Lasat; Stephen D. Ebbs; Leon V. Kochian; Jay Cornish
Source:
Journal of environmental quality 2002 v.31 no.3 pp. 904-909
ISSN:
1537-2537
Subject:
Amaranthus retroflexus; Brassica juncea; Phaseolus acutifolius var. acutifolius; biomass; crops; field experimentation; phytoremediation; planting; polluted soils; radionuclides
Abstract:
... A field test was conducted to determine the ability of three plant species to extract ¹³⁷Cs and ⁹⁰Sr from contaminated soil. Redroot pigweed (Amaranthus retroflexus L.), Indian mustard [Brassica juncea (L.) Czern.], and tepary bean (Phaseolus acutifolius A. Gray) were planted in a series of spatially randomized cells in soil that was contaminated in the 1950s and 1960s. We examined the potential f ...
DOI:
10.2134/jeq2002.9040