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You searched for: Journal Weed technology Remove constraint Journal: Weed technology Publication Year 2019 Remove constraint Publication Year: 2019 Source 2019 v.33 no.2 Remove constraint Source: 2019 v.33 no.2
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1. Distribution of herbicide-resistant Palmer amaranth (Amaranthus palmeri) in row crop production systems in Texas

Author:
Garetson, Russ; Singh, Vijay; Singh, Shilpa; Dotray, Peter; Bagavathiannan, Muthukumar
Source:
Weed technology 2019 v.33 no.2 pp. 355-365
ISSN:
1550-2740
Subject:
3-phosphoshikimate 1-carboxyvinyltransferase; Amaranthus palmeri; acetolactate synthase; atrazine; coasts; crop production; dicamba; dose response; fomesafen; glyphosate; herbicide resistance; photosystem II; production technology; pyrithiobac; rowcrops; surveys; tembotrione; weeds; Texas
Abstract:
... A state-level survey was conducted across major row-crop production regions of Texas to document the level of sensitivity of Palmer amaranth to glyphosate, atrazine, pyrithiobac, tembotrione, fomesafen, and dicamba. Between 137 and 161 Palmer amaranth populations were evaluated for sensitivity to the labelled field rate (1X), and rated as resistant (≤49% injury), less sensitive (50% to 89% injury) ...
DOI:
10.1017/wet.2019.14

2. False-green kyllinga (Kyllinga gracillima) control in cool-season turfgrass

Author:
Elmore, Matthew T.; Patton, Aaron J.; Tuck, Daniel P.; Murphy, James A.; Carleo, Jenny
Source:
Weed technology 2019 v.33 no.2 pp. 329-334
ISSN:
1550-2740
Subject:
Agrostis stolonifera; Kyllinga; cold season; halosulfuron methyl; lawns and turf; mesotrione; sulfentrazone; turf grasses; weeds; Indiana; New Jersey
Abstract:
... We conducted research to evaluate various herbicides for POST false-green kyllinga control in cool-season turfgrass (primarily creeping bentgrass). In a preliminary evaluation, single and sequential applications of halosulfuron-methyl (70 g ai ha⁻¹), mesotrione (175 g ai ha⁻¹), and sulfentrazone (140 g ai ha⁻¹), as well as a single application of imazosulfuron (740 g ai ha⁻¹), were evaluated in Ne ...
DOI:
10.1017/wet.2019.16

3. Multiple herbicide-resistant horseweed (Conyza canadensis) dose response to tolpyralate and tolpyralate plus atrazine and comparison to industry standard herbicides in corn

Author:
Metzger, Brendan A.; Soltani, Nader; Raeder, Alan J.; Hooker, David C.; Robinson, Darren E.; Sikkema, Peter H.
Source:
Weed technology 2019 v.33 no.2 pp. 366-373
ISSN:
1550-2740
Subject:
4-hydroxyphenylpyruvate dioxygenase; Conyza canadensis; Zea mays; atrazine; biotypes; bromoxynil; commercialization; corn; dicamba; dose response; field crops; field experimentation; glyphosate; herbicide resistance; industry; weeds; Ontario
Abstract:
... Horseweed biotypes resistant to glyphosate and ALS-inhibiting herbicides are becoming more prevalent in Canada and the United States and present a significant management challenge in field crops. Tolpyralate is a recently commercialized herbicide for use in corn that inhibits 4-hydroxyphenylpyruvate dioxygenase (HPPD), and there is little information regarding its efficacy on horseweed. Six field ...
DOI:
10.1017/wet.2019.20

4. Nontarget site resistance in Palmer amaranth [Amaranthus palmeri (S.) Wats.] confers cross-resistance to protoporphyrinogen oxidase-inhibiting herbicides

Author:
Varanasi, Vijay K.; Brabham, Chad; Korres, Nicholas E.; Norsworthy, Jason K.
Source:
Weed technology 2019 v.33 no.2 pp. 349-354
ISSN:
1550-2740
Subject:
4-hydroxyphenylpyruvate dioxygenase; Amaranthus palmeri; Glycine max; acetolactate synthase; acifluorfen; adverse effects; biomass; cropping systems; cross resistance; cytochrome P-450; dose response; enzyme inhibitors; flumioxazin; fomesafen; genes; glutathione transferase; malathion; point mutation; protoporphyrinogen oxidase; pyrithiobac; saflufenacil; soybeans; survival rate; tembotrione; weeds; Arkansas
Abstract:
... Palmer amaranth is one of the most problematic weeds in cropping systems of North America, especially in midsouthern United States, because of its competitive ability and propensity to evolve resistance to several herbicide sites of action. Previously, we confirmed and characterized the first case of nontarget site resistance (NTSR) to fomesafen in a Palmer amaranth accession from Randolph County, ...
DOI:
10.1017/wet.2019.12

5. Dicamba-resistant kochia (Bassia scoparia) in Kansas: characterization and management with fall- or spring-applied PRE herbicides

Author:
Kumar, Vipan; Engel, Ryan P.; Currie, Randall; Jha, Prashant; Stahlman, Phillip W.; Thompson, Curtis
Source:
Weed technology 2019 v.33 no.2 pp. 342-348
ISSN:
1550-2740
Subject:
Bassia scoparia; Sorghum bicolor; Triticum aestivum; Zea mays; atrazine; autumn; corn; crop rotation; dicamba; dose response; fallow; field experimentation; grain sorghum; greenhouses; growers; growing season; metribuzin; pendimethalin; spring; sulfentrazone; summer; weeds; wheat; Great Plains region; Kansas
Abstract:
... Dicamba-resistant (DR) kochia is an increasing concern for growers in the US Great Plains, including Kansas. Greenhouse and field experiments (Garden City and Tribune, KS, in the 2014 to 2015 growing season) were conducted to characterize the dicamba resistance levels in two recently evolved DR kochia accessions collected from fallow fields (wheat–sorghum–fallow rotation) near Hays, KS, and to det ...
DOI:
10.1017/wet.2019.4

6. Evaluation of cover crop sensitivity to residual herbicides applied in the previous soybean [Glycine max (L.) Merr] crop

Author:
Whalen, Derek M.; Bish, Mandy D.; Young, Bryan G.; Hager, Aaron G.; Conley, Shawn P.; Reynolds, Daniel B.; Steckel, Lawrence E.; Norsworthy, Jason K.; Bradley, Kevin W.
Source:
Weed technology 2019 v.33 no.2 pp. 312-320
ISSN:
1550-2740
Subject:
Avena sativa; Brassica rapa subsp. oleifera; Glycine max; Lolium multiflorum; Pisum sativum subsp. sativum var. arvense; Raphanus sativus; Secale; Trifolium incarnatum; Triticosecale; Triticum aestivum; Vicia villosa; acetochlor; active ingredients; autumn; chlorimuron; cover crops; crop production; field experimentation; fomesafen; forage; growing season; herbicide residues; imazethapyr; metolachlor; oats; pesticide application; plant establishment; planting; production technology; pyroxasulfone; radishes; risk; rye; soil; soybeans; sulfentrazone; thifensulfuron; triticale; turnips; weeds; winter wheat; Arkansas; Illinois; Indiana; Mississippi; Missouri; Tennessee; Wisconsin
Abstract:
... In recent years, the use of cover crops has increased in U.S. crop production systems. An important aspect of successful cover crop establishment is the preceding crop and herbicide program, because some herbicides have the potential to persist in the soil for several months. Few studies have been conducted to evaluate the sensitivity of cover crops to common residual herbicides used in soybean pr ...
DOI:
10.1017/wet.2019.10

7. Development of a model to predict soybean yield loss from dicamba exposure

Author:
Foster, Matthew R.; Griffin, James L.; Copes, Josh T.; Blouin, David C.
Source:
Weed technology 2019 v.33 no.2 pp. 287-295
ISSN:
1550-2740
Subject:
Glycine max; application timing; canopy height; chlorosis; cracking; crop yield; crops; data collection; dicamba; epinasty; model validation; models; necrosis; petioles; plant height; regression analysis; risk; soybeans; weed control; weeds; yield forecasting
Abstract:
... Although dicamba-resistant crops can provide an effective weed management option, risk of dicamba off-site movement to sensitive crops is a concern. Previous research with indeterminate soybean identified 14 injury criteria associated with dicamba applied at V3/V4 or R1/R2 at 0.6 to 280 g ae ha–¹. Injury criteria rated on a 0 to 5 scale (none to severe), along with percent visible injury and plant ...
DOI:
10.1017/wet.2018.120

8. Environmental factors may influence interseeded annual ryegrass and red clover establishment and growth more than soil residual herbicide applications

Author:
Stanton, Victoria L.; Haramoto, Erin R.
Source:
Weed technology 2019 v.33 no.2 pp. 296-302
ISSN:
1550-2740
Subject:
Lolium perenne; Trifolium pratense; Zea mays; atrazine; biomass; corn; cover crops; dimethenamid; environmental factors; herbicide resistance; pesticide application; risk; soil; spring; summer; weed control; weeds; Kentucky
Abstract:
... Integrating multiple weed management (cultural, physical, chemical) strategies is often recommended to combat herbicide resistance. With the increased use of interseeded cover crops, the effects of PRE herbicides on their establishment and growth require study. An investigation was conducted in Lexington, KY, in 2016 through 2018 to assess the extent to which commonly used PRE corn herbicide combi ...
DOI:
10.1017/wet.2019.3

9. Spray deposition, adjuvants, and physiochemical properties affect benzobicyclon efficacy

Author:
Brabham, Chad; Norsworthy, Jason K.; Sandoski, Craig A.; Varanasi, Vijay K.; Schwartz-Lazaro, Lauren M.
Source:
Weed technology 2019 v.33 no.2 pp. 258-262
ISSN:
1550-2740
Subject:
Echinochloa crus-galli; Leptochloa; Oryza sativa; adjuvants; biomass; field experimentation; greenhouse experimentation; herbicidal properties; herbicides; hydrolysates; leaves; methylation; nonionic surfactants; paddies; rice; seed oils; spray deposition; weed control; weeds; United States
Abstract:
... Benzobicyclon is a new pro-herbicide being evaluated in the Midsouth United States as a post-flood weed control option in rice. Applications of benzobicyclon to flooded rice are necessary for efficacious herbicide activity, but why this is so remains unknown. Two greenhouse experiments were conducted to explore how herbicide placement (foliage only, flood water only, foliage and flood water simult ...
DOI:
10.1017/wet.2019.5

10. Effect of rate and timing of indaziflam on ‘Sunbelt’ and muscadine grape

Author:
Basinger, Nicholas T.; Jennings, Katherine M.; Monks, David W.; Mitchem, Wayne E.
Source:
Weed technology 2019 v.33 no.2 pp. 380-385
ISSN:
1550-2740
Subject:
Vitis labrusca; Vitis rotundifolia; flumioxazin; fruit quality; grapes; pH; titratable acidity; total soluble solids; vineyards; weed control; weeds; North Carolina
Abstract:
... Studies were conducted at six locations across North Carolina to determine tolerance of ‘Sunbelt’ grape (bunch grape) and muscadine grape (‘Carlos’, ‘Triumph’, ‘Summit’) to indaziflam herbicide. Treatments included indaziflam (0, 50, 73 g ai ha⁻¹) or flumioxazin (213 g ai ha⁻¹) applied alone in April, and sequential applications of indaziflam (36, 50, 73 g ai ha⁻¹) or flumioxazin (213 g ai ha⁻¹) a ...
DOI:
10.1017/wet.2018.117

11. Florpyrauxifen-benzyl activity on perennial grass weeds found in Louisiana rice production

Author:
Teló, Gustavo M.; Webster, Eric P.; Blouin, David C.; McKnight, Benjamin M.; Rustom, Samer Y.
Source:
Weed technology 2019 v.33 no.2 pp. 246-252
ISSN:
1550-2740
Subject:
Leersia oryzoides; Oryza sativa; Paspalum; crop production; grass weeds; grasses; greenhouse experimentation; leaves; perennials; plant height; rice; Louisiana
Abstract:
... A glasshouse study was conducted on the Louisiana State University campus in Baton Rouge, LA, to evaluate the control of brook crowngrass, rice cutgrass, southern watergrass, and water paspalum. Florpyrauxifen-benzyl was applied at 30 g ai ha⁻¹ to each grass species at the 3- to 4-leaf or 1- to 2-stolon stage of growth. Brook crowngrass treated with florpyrauxifen was controlled 71% at 21 d after ...
DOI:
10.1017/wet.2018.123

12. Influence of a thiamethoxam seed treatment on acetolactate synthase–inhibiting herbicide–induced injury to inbred and hybrid imidazolinone-resistant rice

Author:
Martin, Steven M.; Norsworthy, Jason K.; Scott, Robert C.; Hardke, Jarrod; Lorenz, Gus M.; Gbur, Edward
Source:
Weed technology 2019 v.33 no.2 pp. 253-257
ISSN:
1550-2740
Subject:
Oryza sativa; acetolactate synthase; bispyribac-sodium; canopy; canopy height; cultivars; field experimentation; growing season; hybrids; imazethapyr; pesticide application; rice; seed treatment; thiamethoxam; weeds; Arkansas
Abstract:
... The increased use of insecticide seed treatments in rice has raised many questions about the potential benefits of these products. In 2014 and 2015, a field experiment was conducted near Stuttgart and Lonoke, AR, to evaluate whether an insecticide seed treatment could possibly lessen injury from acetolactate synthase (ALS)–inhibiting herbicides in imidazolinone-resistant (IR) rice. Two IR cultivar ...
DOI:
10.1017/wet.2019.1

13. Integrating cultivation using a tine weeder with herbicides in conventional peanut production

Author:
Carroll Johnson, W.; Luo, Xuelin
Source:
Weed technology 2019 v.33 no.2 pp. 374-379
ISSN:
1550-2740
Subject:
Arachis hypogaea; Jacquemontia tamnifolia; annuals; cost effectiveness; crop yield; ethalfluralin; grasses; imazapic; metolachlor; peanuts; rain; risk; soil; species diversity; weed control; weeds; Georgia
Abstract:
... Research from the 1980s reported sweep cultivation being a cost-effective component in an integrated system to manage weeds in peanut. Previous weed management research conducted on organic peanut indicated that repeated cultivation with a tine weeder was an effective component in that production system. Studies were conducted in Tifton, GA, from 2014 through 2017 to determine whether tine weeding ...
DOI:
10.1017/wet.2018.114

14. Interactions of quizalofop-p-ethyl mixed with contact herbicides in ACCase-resistant rice production

Author:
Rustom, Samer Y.; Webster, Eric P.; Blouin, David C.; McKnight, Benjamin M.
Source:
Weed technology 2019 v.33 no.2 pp. 233-238
ISSN:
1550-2740
Subject:
Echinochloa crus-galli; Oryza sativa; bentazon; carfentrazone; crop production; propanil; quizalofop; red rice; saflufenacil; thiobencarb; weed control; weeds; Louisiana
Abstract:
... A field study was conducted in 2015 and 2016 near Crowley, LA, to evaluate antagonistic, synergistic, or neutral interactions of quizalofop when mixed with contact herbicides labeled for use in rice production. Quizalofop was applied at 120 g ai ha⁻¹. Mixture herbicides included bentazon at 1,050 g ai ha⁻¹, carfentrazone at 18 g ai ha⁻¹, propanil at 3,360 g ai ha⁻¹, saflufenacil at 25 g ai ha⁻¹, a ...
DOI:
10.1017/wet.2018.116

15. Horseweed (Conyza canadensis) Suppression from Cover Crop Mixtures and Fall-Applied Residual Herbicides

Author:
Pittman, Kara B.; Barney, Jacob N.; Flessner, Michael L.
Source:
Weed technology 2019 v.33 no.2 pp. 303-311
ISSN:
1550-2740
Subject:
Brassica; Conyza canadensis; Glycine max; Raphanus sativus; Secale cereale; Trifolium incarnatum; Vicia villosa; Zea mays; biomass; chlorimuron ethyl; corn; cover crop termination; cover crops; field experimentation; flumioxazin; forage; herbicide resistance; integrated weed management; metribuzin; no-tillage; paraquat; radishes; rye; soybeans; spring; weeds; winter
Abstract:
... Horseweed is a problematic weed to control, especially in no-tillage production. Increasing cases of herbicide resistance have exacerbated the problem, necessitating alternative control options and an integrated weed management approach. Field experiments were conducted to evaluate horseweed suppression from fall-planted cover crop monocultures and mixtures as well as two fall-applied residual her ...
DOI:
10.1017/wet.2018.111

16. First Report of Kochia (Bassia scoparia) with Cross-Resistance to Dicamba and Fluroxypyr in Western Kansas

Author:
Kumar, Vipan; Currie, Randall S.; Jha, Prashant; Stahlman, Phillip W.
Source:
Weed technology 2019 v.33 no.2 pp. 335-341
ISSN:
1550-2740
Subject:
3-phosphoshikimate 1-carboxyvinyltransferase; Bassia scoparia; corn; cover crops; crop rotation; cross resistance; dicamba; dose response; fluroxypyr; gene dosage; genes; glyphosate; glyphosate resistance; growers; tillage; weeds; Great Plains region; Kansas
Abstract:
... Evolution and rapid spread of herbicide-resistant (HR) kochia has become a significant challenge for growers in the U.S. Great Plains. The main objectives of this research were to confirm and characterize the response of putative auxinic HR (Aux-HR) kochia accessions (designated as KS-4A, KS-4D, KS-4H, KS-10A, KS-10-G, and KS-10H) collected from two different corn fields near Garden City, KS, to d ...
DOI:
10.1017/wet.2018.113

17. The effect of cotton growth stage on response to a sublethal concentration of 2,4-D

Author:
Buol, John T.; Reynolds, Daniel B.; Dodds, Darrin M.; Mills, J. Anthony; Nichols, Robert L.; Bond, Jason A.; Jenkins, Johnie N.; DuBien, Janice L.
Source:
Weed technology 2019 v.33 no.2 pp. 321-328
ISSN:
1550-2740
Subject:
2,4-D; Gossypium hirsutum; auxins; commercialization; cotton; cultivars; developmental stages; field experimentation; fruit set; manual harvesting; mechanical harvesting; micronaire; pesticide application; weed control; weeds; Mississippi
Abstract:
... Recent commercialization of auxin herbicide–based weed control systems has led to increased off-target exposure of susceptible cotton cultivars to auxin herbicides. Off-target deposition of dilute concentrations of auxin herbicides can occur on cotton at any stage of growth. Field experiments were conducted at two locations in Mississippi from 2014 to 2016 to assess the response of cotton at vario ...
DOI:
10.1017/wet.2019.9

18. Barnyardgrass (Echinochloa crus-galli) Control as Affected by Application Timing of Glufosinate Applied Alone or Mixed with Graminicides

Author:
Eytcheson, Amber N.; Reynolds, Daniel B.
Source:
Weed technology 2019 v.33 no.2 pp. 272-279
ISSN:
1550-2740
Subject:
Echinochloa crus-galli; Glycine max; application timing; biomass; clethodim; crop yield; developmental stages; environmental factors; fluazifop-P; glufosinate; greenhouse experimentation; greenhouses; growing season; soybeans; weeds
Abstract:
... Field and greenhouse studies were conducted to evaluate the antagonism potential of glufosinate applied sequentially or mixed with graminicides on barnyardgrass control. Applications of glufosinate alone provided variable control throughout the growing season in both field and greenhouse experiments. In the field, barnyardgrass control was not adversely affected by glufosinate- and clethodim-mix a ...
DOI:
10.1017/wet.2018.89