Influence of Tillage and Herbicides on Weed Control in a Wheat (Triticum aestivum)–Soybean (Glycine max) Rotation

Weed Science ◽  
1986 ◽  
Vol 34 (4) ◽  
pp. 590-594 ◽  
Author(s):  
Henry P. Wilson ◽  
Martin P. Mascianica ◽  
Thomas E. Hines ◽  
Ronald F. Walden
Keyword(s):  
Triticum Aestivum ◽  
Glycine Max ◽  
Weed Control ◽  
Field Studies ◽  
Conventional Tillage ◽  
Weed Species ◽  
Stellaria Media ◽  
Grain Yields ◽  
No Till ◽  
Anthemis Arvensis

Field studies were conducted for 4 yr to investigate the effects of tillage and herbicide programs on weed control and wheat (Triticum aestivumL. ‘Potomac’ in 1981 and ‘Wheeler’ from 1982 to 1984) grain yields in a wheat-soy bean [Glycine max(L.) Merr.] double-crop rotation. Predominant weed species were common chickweed [Stellaria media(L.) Vill. # STEME], corn chamomile (Anthemis arvensisL. # ANTAR), and annual bluegrass (Poa annuaL. # POAAN) at the onset of research and cheat (Bromus secalinusL. # BROSE) and soft brome (Bromus mollisL. # BROMO) at the conclusion of the study. Control of all species was excellent with conventional tillage and no-till plus nonselective herbicides but was significantly less with no-till without nonselective herbicides and with minimum tillage. After 4 yr, maximum wheat grain yields were significantly higher in conventional- than in minimum- or no-till systems.

Weed Control with Reduced Rates of Chlorimuron Plus Metribuzin and Imazethapyr in No-Till Narrow-Row Soybean (Glycine max)

1998 ◽  
Vol 12 (1) ◽  
pp. 32-36 ◽  
Author(s):  
William G. Johnson ◽  
Jeffrey S. Dilbeck ◽  
Michael S. Defelice ◽  
J. Andrew Kendig
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Field Studies ◽  
Weed Suppression ◽  
Crop Response ◽  
Soybean Production ◽  
No Till ◽  
Giant Foxtail ◽  
The Difference ◽  
Narrow Row

Field studies were conducted at three locations in 1993 and 1994 to evaluate weed control and crop response to combinations of glyphosate, metolachlor, 0.5 X and 1 X label rates of chlorimuron plus metribuzin applied prior to planting (PP), and 0.5 X and 1 X label rates of imazethapyr applied early postemergence (EPOST) or postemergence (POST) in no-till narrow-row soybean production. Giant foxtail densities were reduced with sequential PP followed by (fb) EPOST or POST treatments. Large crabgrass was reduced equivalently with all herbicide combinations involving chlorimuron plus metribuzin PP fb imazethapyr. Common cocklebur control was variable but was usually greater with treatments that included imazethapyr. Ivyleaf morningglory densities were not reduced with any herbicide combinations. Sequential PP fb EPOST or POST treatments tended to provide slightly better weed suppression than PP-only treatments, but the difference was rarely significant. Soybean yields with treatments utilizing 0.5 X rates were usually equal to 1 X rates.

Effect of Tillage Systems on the Efficacy and Phytotoxicity of Imazaquin and Imazethapyr in Soybean (Glycine max)

Weed Science ◽  
1989 ◽  
Vol 37 (2) ◽  
pp. 233-238 ◽  
Author(s):  
J. Anthony Mills ◽  
William W. Witt
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Field Experiments ◽  
Conventional Tillage ◽  
No Tillage ◽  
Tillage Systems ◽  
Adequate Control ◽  
No Till ◽  
Herbicide Treatment ◽  
Giant Foxtail

Field experiments were conducted to evaluate the interactions of tillage systems with imazaquin and imazethapyr on weed control and soybean injury and yield. Control of jimsonweed, common cocklebur, ivyleaf morningglory, velvetleaf, and giant foxtail from imazaquin and imazethapyr in conventional tillage was generally equal to or greater than control in no-tillage. However, under limited rainfall, weed control in no-tillage was generally equal to or greater than control in conventional tillage. Reductions in soybean heights due to herbicide treatment were evident in both tillage systems in 1985 and 1986 but not in. Soybean yields were reduced in 1985 from imazaquin at 140, 210, and 250 g/ha and imazethapyr at 105 and 140 g/ha. Yields were not reduced in 1986 and. Imazaquin and imazethapyr appear to provide adequate control of jimsonweed, common cocklebur, ivyleaf morningglory, velvetleaf, and giant foxtail in conventional and no-till systems.

Weed control with reduced rates of imazaquin and imazethapyr in no-till narrow-row soybean (Glycine max)

Weed Science ◽  
1998 ◽  
Vol 46 (1) ◽  
pp. 105-110 ◽  
Author(s):  
William G. Johnson ◽  
Jeffrey S. Dilbeck ◽  
Michael S. DeFelice ◽  
J. Andrew Kendig
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Field Studies ◽  
Net Income ◽  
Crop Response ◽  
Soybean Production ◽  
No Till ◽  
Giant Foxtail ◽  
Herbicide Treatments ◽  
Narrow Row

Field studies were conducted at three locations in 1993 and 1994 to evaluate weed control and crop response to metolachlor plus combinations of 0.5 × and 1 × label rates of imazaquin applied preplant and imazethapyr applied early postemergence or postemergence in no-till narrow-row soybean production. Giant foxtail, common ragweed, common cocklebur, and large crabgrass population reductions were greater with sequential preplant metolachlor plus imazaquin followed by early postemergence or postemergence imazethapyr than with preplant metolachlor plus imazaquin or early postemergence/postemergence imazethapyr alone. Ivyleaf morningglory was not effectively controlled by any herbicide program. Pennsylvania smartweed populations were reduced with all herbicide treatments. Soybean yields with treatments utilizing 0.5 × rates were usually equal to 1 × rates if imazethapyr was applied early postemergence or postemergence. Net income with reduced herbicide rates was equal to full-label rates and provided no greater risk to net income.

Early Preplant Herbicide Applications for No-Till Soybean (Glycine max) Weed Control

Weed Science ◽  
1984 ◽  
Vol 32 (3) ◽  
pp. 293-298 ◽  
Author(s):  
R. N. Stougaard ◽  
George Kapusta ◽  
Gordon Roskamp
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Ground Cover ◽  
Field Studies ◽  
No Till ◽  
Better Than

Several field studies were conducted during 1981 and 1982 to determine whether early preplant (EPP) applications of residual herbicides would prevent the establishment of vegetation before planting no-till soybeans [Glycine max(L.) Merr. ‘Williams’]. Early preplant applications of either cyanazine {2-[[4-chloro-6-(ethylamino)-s-triazin-2-yl] amino]-2-methylpropionitrile} or cyanazine plus oryzalin (3,5-dinitro-N4,N4-dipropylsulfanilamide) were applied in the fall and 3, 2, and 1 month(s) before planting no-till soybeans. In all studies, the treatments prevented vegetation from becoming established before planting, and season-long weed control was achieved with several different treatments. Early preplant cyanazine plus oryzalin provided greater than 90% control for the entire season where grass densities were low. Where grass densities were high (greater than 90% ground cover), EPP cyanazine plus a preemergence application of metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide] plus metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one] or a postemergence application of sethoxydim {2-[1-(ethoxyimino) butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} controlled 90% of the weeds, which was equal to or better than the standard preemergence treatments used (80 to 98% weed control).

Selecting Cost-Minimizing Herbicide Programs for Corn (Zea mays)

1996 ◽  
Vol 10 (2) ◽  
pp. 327-336 ◽  
Author(s):  
J. Rolf Olsen ◽  
Jayson K. Harper ◽  
William S. Curran
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Conventional Tillage ◽  
Programming Approach ◽  
Weed Species ◽  
Management Options ◽  
Corn Production ◽  
No Till ◽  
The Cost ◽  
Herbicide Programs

A computer model which selects least cost herbicide programs given a minimum desired level of weed control could provide growers with economical weed management options. Using an integer programming approach, a herbicide selection model was developed for corn production under Pennsylvania conditions. Models for three rotations (corn-soybean, corn-corn, and corn-alfalfa) under three tillage systems (conventional tillage, reduced tillage, and no-till) that evaluated 21 soil-applied and 13 postemergence herbicide options for 24 weeds were developed. Each model minimizes the cost of a herbicide program subject to a desired level of weed control. By selecting the weed species to be controlled and the level of control desired, customized herbicide programs can be generated. The models can also be used to evaluate the cost of changing the level of control desired for an individual weed species or set of weeds.

Mefluidide as an Enhancing Agent for Postemergence Broadleaf Herbicides in Soybeans (Glycine max)

1987 ◽  
Vol 1 (2) ◽  
pp. 149-153 ◽  
Author(s):  
Michael R. Blumhorst ◽  
George Kapusta
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Field Studies ◽  
Weed Species ◽  
Nitrobenzoic Acid ◽  
Petroleum Oil

In field studies, mefluidide {N-[2,4-dimethyl-5-[[(trifluoromethyl)sulfonyl] amino] phenyl] acetamide} was most effective as an enhancing agent for bentazon [3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] and/or acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid} when applied as a tank mixture compared to sequential applications. The influence of mefluidide rate on weed control was not consistent. Additives improved the control of several weed species evaluated, but mefluidide generally was only equal to petroleum oil concentrate (phytobland petroleum oil plus emulsifiers in an 83:17 ratio) as an enhancing agent for bentazon and/or acifluorfen.

Weed Control for Soybean (Glycine max) Planted in a Stale or Undisturbed Seedbed on Clay Soil

1992 ◽  
Vol 6 (1) ◽  
pp. 119-124 ◽  
Author(s):  
Larry G. Heatherly ◽  
C. Dennis Elmore ◽  
Richard A. Wesley
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Seed Yield ◽  
Clay Soil ◽  
Soybean Seed ◽  
Field Studies ◽  
No Till ◽  
Seed Yields ◽  
Made In

Field studies were conducted for three consecutive years to determine if PRE and/or POST herbicides were needed in addition to preplant foliar-applied glyphosate and POST cultivation for maximum seed yield of irrigated and nonirrigated soybean planted in stale and undisturbed seedbeds on clay soil. Soybean seed yields following the use of PRE and POST herbicides alone or in combination were similar in all years, and exceeded seed yield following the use of glyphosate plus POST cultivation only. Plantings made in no-till and fall-till seedbeds produced similar seed yields when both PRE and POST herbicides were used. These results indicate that glyphosate plus cultivation was not adequate for soybean in stale seedbed plantings, and that either PRE or POST herbicides, but not both, were required for maximum seed yield.

Evaluation of Chlorsulfuron in Wheat (Triticum aestivum) and in a Wheat-Soybean (Glycine max) Double-Cropping System

Weed Science ◽  
1985 ◽  
Vol 33 (5) ◽  
pp. 746-749 ◽  
Author(s):  
Khosro Khodayari ◽  
Robert E. Frans ◽  
Khalid H. Akkari
Keyword(s):  
Triticum Aestivum ◽  
Glycine Max ◽  
Winter Wheat ◽  
Weed Control ◽  
Residual Effect ◽  
Cropping System ◽  
Propanoic Acid ◽  
Double Cropping ◽  
No Till ◽  
Wild Garlic

Chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl] benzenesulfonamide} was evaluated for weed control in winter wheat (Triticum aestivumL.) and for residual effect on soybeans [Glycine max(L.) Merr.] following wheat. Chlorsulfuron applied at 72 g ai/ha and less did not injure or reduce grain yields of ‘Double-Cropped’ wheat. Postemergence tank mixtures of chlorsulfuron at 36 g/ha with diclofop {(±)-2-[4-(2,4-dichlorophenoxy)phenoxy] propanoic acid} at 1 kg/ha were more effective than other treatments for control of wild garlic (Allium vinealeL. ♯ ALLVI). ‘Forrest’ soybeans did not show any injury from chlorsulfuron residue even at rates of 72 g/ha when it was no-till seeded following winter wheat.

Chlorsulfuron and Metsulfuron Residues on Double-Cropped Soybeans (Glycine max)

1988 ◽  
Vol 2 (1) ◽  
pp. 49-52 ◽  
Author(s):  
Ronald L. Ritter ◽  
Thomas C. Harris ◽  
Lisa M. Kaufman
Keyword(s):  
Triticum Aestivum ◽  
Glycine Max ◽  
Field Experiments ◽  
Soybean Seed ◽  
Field Studies ◽  
Early Spring ◽  
Residual Effects ◽  
Early Winter ◽  
No Till ◽  
Seed Yields

In field experiments in 1981, 36 g ai/ha of chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl] benzenesulfonamide} applied to winter wheat (Triticum aestivumL. ‘Arthur’) in early spring reduced seed yield in conventional and no-till plantings of double-cropped soybeans [Glycine max(L.) ‘Essex’]. From 1982 to 1984, three rates of chlorsulfuron (9, 18, and 36 g/ha) were applied at three different times (preemergence, early winter, and early spring) to study their residual effects on double-cropped soybeans. Chlorsulfuron at 36 g/ha applied preemergence or early spring reduced soybean seed yields when averaged over the 3-yr period. Metsulfuron {2-[[[[(4-methoxy-6-methyl-1,3,5-triazine-2-yl)amino] carbonyl] amino] sulfonyl] benzoic acid} was tested at three rates (4.5, 9, and 18 g/ha) applied at three times (same as chlorsulfuron) in field studies in 1983 and 1984. Metsulfuron did not injure subsequently planted no-till soybeans.

Net Returns from Stale Seedbed Plantings of Soybean (Glycine max) on Clay Soil

1993 ◽  
Vol 7 (4) ◽  
pp. 972-980 ◽  
Author(s):  
Larry G. Heatherly ◽  
Richard A. Wesley ◽  
C. Dennis Elmore ◽  
Stan R. Spurlock
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Cover Crop ◽  
Clay Soil ◽  
Field Studies ◽  
Net Return ◽  
Early Planting ◽  
Net Returns ◽  
No Till

Field studies were conducted for three years in each of two successive experiments and analyzed to determine net return from stale seedbed plantings of soybean. Treatments in the first experiment were early May and late May/early June plantings in seedbeds that had combinations of tillage at various times between harvest and planting, incorporation of trifluralin, or no preplant tillage. Treatments in the second experiment were irrigated and nonirrigated stale or no-till seedbed plantings with weed control treatments that included POST cultivation plus combinations of preplant foliar-applied (PFA) glyphosate, PRE metribuzin, and POST herbicides. Results indicate that 1) early planting of soybean resulting from use of a stale seedbed will result in higher net returns when irrigation is used, 2) use of a wheat cover crop does not justify the expense, 3) soybean planted in a no-till seedbed will result in net return similar to that from plantings in fall-tilled, spring-tilled, or prepared seedbeds, 4) use of only a PFA herbicide plus POST cultivation in a stale seedbed planting where competitive weeds such as common cocklebur appear later will result in a significant reduction in net returns, and 5) use of PRE herbicides in conjunction with PFA herbicide and POST cultivation in a stale seedbed planting will result in the highest net return with the least input.

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