Weed Control with Non-Selective Herbicides in Soybean (Glycine max) Stale Seedbed Culture

1994 ◽  
Vol 8 (1) ◽  
pp. 159-164 ◽  
Author(s):  
Andrew J. Lanie ◽  
James L. Griffin ◽  
P. Roy Vidrine ◽  
Daniel B. Reynolds
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Soil Tillage ◽  
Herbicide Application ◽  
Soybean Yield ◽  
Hemp Sesbania ◽  
Prickly Sida ◽  
Control Post

Barnyardgrass and morningglory control POST with glufosinate at 840 g a.i./ha 28 d after treatment was 79 to 85% and 83 to 90%, respectively, when no more than 35 d elapsed between initial spring soil tillage and herbicide application. For the same rate of glufosinate, prickly sida and hemp sesbania were controlled 68 and 92%, respectively. Comparable barnyardgrass control was obtained with glufosinate at 560 and 840 g/ha, which was greater than at 420 g/ha. Hemp sesbania control was similar for all rates of glufosinate. In comparison, paraquat at 1050 g a.i./ha controlled 40 to 65% barnyardgrass, 44 to 75% morningglory, 41% prickly sida, and 92% hemp sesbania. With 840 g a.i./ha glyphosate and SC-0224, barnyardgrass, morningglory, prickly sida, and hemp sesbania were controlled 55 to 89%, 55 to 81%, 45 to 61%, and 56 to 68%, respectively. Soybean yield was 5.8, 7.6, 6.0, and 5.9 times greater than the nontreated check for 1050 g/ha paraquat and 840 g/ha glufosinate, glyphosate, and SC-0224, respectively.

Influence of Residual Herbicides on Rate of Paraquat and Glyphosate in Stale Seedbed Soybean (Glycine max)

1993 ◽  
Vol 7 (4) ◽  
pp. 960-965 ◽  
Author(s):  
Andrew J. Lanie ◽  
James L. Griffin ◽  
Daniel B. Reynolds ◽  
P. Roy Vidrine
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Field Studies ◽  
Soybean Yield ◽  
Herbicide Treatment ◽  
Herbicide Treatments ◽  
Hemp Sesbania ◽  
Prickly Sida ◽  
Residual Herbicide ◽  
Control Tank

Field studies were conducted to evaluate weed control with paraquat and glyphosate applied at various rates alone and in combination with residual herbicides. Morningglory, prickly sida, and hemp sesbania control 28 d after treatment was similar regardless of herbicide treatment. In contrast, barnyardgrass control when paraquat was tank mixed with pendimethalin plus imazaquin was equal to that of paraquat alone but less than that for tank mixtures with metolachlor plus metribuzin plus chlorimuron or metolachlor plus metribuzin. Barnyardgrass control and soybean yield when paraquat was applied at 1050 g ai/ha in combination with metolachlor plus metribuzin plus chlorimuron or metolachlor plus metribuzin was greater than when the same residual herbicide treatments were applied with paraquat at 350 g/ha. Yield following glyphosate at 840 and 1120 g ai/ha in combination with residual herbicides was no greater than when glyphosate was applied alone, which was reflective of barnyardgrass control. Tank mixtures of glyphosate at 1680 g/ha with metolachlor plus metribuzin plus chlorimuron or metolachlor plus metribuzin resulted in soybean yield higher than for glyphosate alone. Regardless of the glyphosate and residual herbicide combination, soybean yield was no greater than when paraquat was applied at 350 g/ha in combination with metolachlor plus metribuzin plus chlorimuron.

Weed Control for Close-Drilled Soybeans

Weed Science ◽  
1972 ◽  
Vol 20 (1) ◽  
pp. 16-19 ◽  
Author(s):  
L. M. Wax
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Yield Reduction ◽  
Herbicide Application ◽  
Weed Species ◽  
Soybean Yield ◽  
Planting Time ◽  
Large Numbers ◽  
Seedbed Preparation

Delayed planting or “stale seedbed” for weed control in close-drilled (20-cm rows) soybeans [Glycine max(L.) Merr. ‘Amsoy’] was evaluated for 3 years. The system combined final seedbed preparation 3 to 6 weeks before planting with herbicide application at planting time. The best control of six weed species and highest soybean yields were obtained bya,a,a-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) application at the time of seedbed preparation followed by 3-(3,4-dichlorophenyl)-1-methylurea (linuron) application at planting and by linuron application at planting without the early trifluralin application. Applications of 1,1′-dimethyl-4,4′-bipyridinium ion (paraquat) at planting, either with or without trifluralin treatments, resulted in less weed control and lower soybean yields than comparable treatments with linuron. However, even the best treatments failed to provide the weed control necessary to prevent substantial soybean yield reduction in heavy infestations of weeds that emerge in large numbers after planting, and that resist the phytotoxic action of the herbicides.

Metribuzin and Chlorimuron Mixtures for Preemergence Broadleaf Weed Control in Soybeans,Glycine max

1988 ◽  
Vol 2 (3) ◽  
pp. 355-363 ◽  
Author(s):  
Jerome M. Green ◽  
Timothy T. Obrigawitch ◽  
James D. Long ◽  
James M. Hutchison
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Ethyl Ester ◽  
Field Studies ◽  
Redroot Pigweed ◽  
Additive Action ◽  
Hemp Sesbania ◽  
Prickly Sida

Metribuzin and the ethyl ester of chlorimuron were evaluated alone and in combination for preemergence broadleaf weed control in soybeans. Neither herbicide alone controlled all broadleaf weeds tested, but combinations showed both complementary and additive action. Two field studies quantified these interactions on broadleaf weeds and showed that low rates of either herbicide alone controlled Pennsylvania smartweed and redroot pigweed. Metribuzin was more effective than chlorimuron in controlling prickly sida and hemp sesbania, while chlorimuron was more effective on common cocklebur, sicklepod, and ivyleaf and pitted morningglories. Additive action was most important on velvetleaf, sicklepod, annual morningglories, and hemp sesbania. Because the components were both additive and complementary, a range of mixture rates and ratios were more effective for weed control than either herbicide alone.

Annual Weed Control by Glyphosate in Glyphosate-Resistant Soybean (Glycine max)

1999 ◽  
Vol 13 (2) ◽  
pp. 394-398 ◽  
Author(s):  
Comfort M. Ateh ◽  
Robert G. Harvey
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Herbicide Application ◽  
Soybean Yield ◽  
Common Lambsquarters ◽  
Giant Foxtail

Control of natural infestations of common lambsquarters and giant foxtail in 1993, 1994, and 1995 and of velvetleaf in 1994 and 1995 by postemergence application of glyphosate to glyphosate-resistant soybean planted in narrow (20 cm) and wide (76 cm) rows was evaluated. Planting glyphosate-resistant soybean in narrow rows and applying reduced rates of glyphosate when common lambsquarters, giant foxtail, and velvetleaf were at their actively growing stage 3 to 18 cm, 5 to 28 cm, and 3 to 20 cm tall, respectively, resulted in > 90% control. The effect of time of herbicide application was greater than the rate of herbicide application, especially within the wide-row soybean plantings. Applying imazethapyr in combination with glyphosate did not improve weed control or soybean yield compared with glyphosate alone.

Evaluation of Soil-Applied Herbicides in Sequential Programs with CGA-277476 in Soybean (Glycine max)

1999 ◽  
Vol 13 (2) ◽  
pp. 271-275 ◽  
Author(s):  
Eric W. Palmer ◽  
David R. Shaw ◽  
J. C. Holloway
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Sequential Programs ◽  
Soybean Yield ◽  
Pitted Morningglory ◽  
Hemp Sesbania

Soil-applied herbicides alone or followed by postemergence (POST) applications of CGA-277476 were evaluated for season-long weed control in soybean. Common cocklebur, hemp sesbania, and pitted morningglory control was not consistently improved with a soil-applied herbicide followed by a POST application of 79 g ai/ha CGA-277476. However, in locations with heavy weed pressure, a tank-mix of chlorimuron + metribuzin + trifluralin or imazaquin + pendimethalin followed by CGA-277476 improved common cocklebur, hemp sesbania, and pitted morningglory over CGA-277476 alone. Sequential application of CGA-277476 following SAN 582 improved weed control over SAN 582 alone. When weed pressure was not severe, there were no differences in control from CGA-277476 alone or following soil-applied herbicides. A POST application of CGA-277476 following soil-applied herbicides did not consistently improve soybean yield over CGA-277476 alone. Yield from soybean treated with SAN 582 was improved when CGA-277476 was applied. In contrast, when chlorimuron + metribuzin + trifluralin or imazaquin + pendimethalin were applied at planting, yield was similar with or without POST application of CGA-277476.

Broadleaf Weed Control with Trifluralin Plus Flumetsulam in Soybean (Glycine max)

1995 ◽  
Vol 9 (3) ◽  
pp. 446-451 ◽  
Author(s):  
Daniel B. Reynolds ◽  
David L. Jordan ◽  
P. Roy Vidrine ◽  
James L. Griffin
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Soybean Yield ◽  
Pitted Morningglory ◽  
Hemp Sesbania ◽  
Herbicide Programs

In 12 trials in Louisiana, sicklepod, entireleaf morningglory, pitted morningglory, and hemp sesbania control 4 wk after planting was greater with trifluralin applied PPI followed by chlorimuron plus metribuzin applied PRE than with trifluralin plus flumetsulam applied PPI. Sicklepod control with these herbicides was similar 6 wk after application. No differences in soybean yield were noted. Chlorimuron applied POST following trifluralin applied PPI and metribuzin applied PRE or trifluralin plus flumetsulam applied PPI improved weed control and soybean yield compared with soil-applied herbicides alone. Excellent barnyardgrass control was obtained with all herbicide programs.

Broadleaf Weed Control in Soybean (Glycine max) with Sulfentrazone

1996 ◽  
Vol 10 (4) ◽  
pp. 762-765 ◽  
Author(s):  
P. Roy Vidrine ◽  
James L. Griffin ◽  
David L. Jordan ◽  
Daniel B. Reynolds
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
General Increase ◽  
Application Method ◽  
Hemp Sesbania ◽  
One Year ◽  
Prickly Sida

Experiments were conducted at three locations in Louisiana from 1992 to 1994 to evaluate broadleaf weed control with sulfentrazone. Sulfentrazone at 0.42 kg ai/ha applied PPI or PRE provided at least 93% control of entireleaf morningglory in all years at all locations, which was greater than control with metribuzin PRE. Prickly sida control with sulfentrazone ranged from 83 to 94%, which was equal to or greater than control with metribuzin. Hemp sesbania and sicklepod control with sulfentrazone was unacceptable (≤75%) regardless of application method and generally was lower than control with metribuzin. Greater than 90% control of smellmelon and hophornbeam copperleaf was observed with all treatments. Minor but transient soybean injury was noted at one location in one year. Soybean yields following sulfentrazone PRE at St. Joseph were greater than yields with metribuzin as a result of the general increase in broadleaf weed control.

Herbicide Systems in Stale Seedbed Soybean (Glycine max) Production

1993 ◽  
Vol 7 (4) ◽  
pp. 816-823 ◽  
Author(s):  
Lawrence R. Oliver ◽  
Tracy E. Klingaman ◽  
Marilyn McClelland ◽  
Robert C. Bozsa
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Field Experiments ◽  
Growing Season ◽  
Application Time ◽  
Herbicide Application ◽  
Soybean Yield ◽  
Pitted Morningglory ◽  
Herbicide Activity ◽  
Better Than

Field experiments were conducted using a stale seedbed production system to determine the effect of herbicide application time on preplant, preplant incorporated (PPI), and at-planting treatments on weed control and soybean yield. Herbicides were applied on the surface preplant (PPL) or PPI at 6 to 7, 4 to 5, and 2 to 3 wk before planting and just prior to planting. The differences in weed control and soybean yield among years were due to rainfall patterns 2 wk after herbicide application and during the growing season. Preplant treatments applied 2 to 5 wk before planting generally controlled common cocklebur and pitted morningglory better than preplant treatments applied 6 to 7 wk before planting due to persistence of herbicide activity or treatments at planting due to a greater chance of obtaining adequate rainfall for herbicide activation, more uniform seedbed at planting, and larger weeds at application. Metribuzin plus chlorimuron was less suited than imazaquin as a preplant treatment when applied more than 2 weeks before planting.

Influence of Simulated Rainfall and Soil Moisture on Herbicidal Activity of Cinmethylin

Weed Science ◽  
1990 ◽  
Vol 38 (3) ◽  
pp. 267-272 ◽  
Author(s):  
Steven G. Russell ◽  
Thomas J. Monaco ◽  
Jerome B. Weber
Keyword(s):  
Weed Control ◽  
Sandy Loam ◽  
Field Trials ◽  
Herbicidal Activity ◽  
Herbicide Application ◽  
Weed Species ◽  
Green Foxtail ◽  
Loam Soil ◽  
Dry Soil ◽  
Prickly Sida

Field trials were conducted in 1986 and 1987 to determine the effects of moisture on herbicidal activity of cinmethylin applied preemergence at 0.0, 0.3, 0.6, and 0.9 kg ai ha to both dry and moist sandy loam soil. Herbicide application was followed by varying amounts of irrigation. Weed species included velvetleaf, prickly sida, green foxtail, and barnyardgrass. When cinmethylin was applied to a moist soil or when 2.5 cm of irrigation was applied 5 days after cinmethylin application to a dry soil, overall weed control was reduced. Optimum weed control resulted from cinmethylin application to dry soil followed either by a 2.5-cm irrigation within 8 h or a 7.6-cm irrigation within 36 h.

Soybean (Glycine max) Response to Thifensulfuron and Bentazon Combinations

1998 ◽  
Vol 12 (1) ◽  
pp. 179-184 ◽  
Author(s):  
Stephen E. Hart ◽  
Gordon K. Roskamp
Keyword(s):  
Glycine Max ◽  
Grain Yield ◽  
Weed Control ◽  
Field Studies ◽  
Soybean Yield

Field studies were conducted in 1995 and 1996 at three locations in Illinois to determine soybean response to combinations of thifensulfuron and bentazon. Thifensulfuron was applied at 2.2 to 8.8 g ai/ha alone or in combination with 280 to 560 g/ha of bentazon. Soybean injury 30 d after treatment ranged from 0 to 22% when thifensulfuron was applied alone at 2.2 g/ha. Increasing thifensulfuron rate to 8.8 g/ha increased soybean injury to a range of 12 to 44%. Soybean grain yield was significantly reduced compared to the yield of untreated soybean when thifensulfuron was applied at 4.4 and 8.8 g/ha in two of five and four of five experiments, respectively. The addition of bentazon to thifensulfuron consistently reduced soybean injury and stunting. In many cases, increasing the bentazon rate to 420 g/ha decreased soybean injury from thifensulfuron to a greater extent than 280 g/ha. In cases where thifensulfuron decreased soybean yield, the addition of 420 or 560 g/ha of bentazon restored yields to levels that were not lower than untreated soybeans. These studies demonstrate that thifensulfuron at 2.2 to 8.8 g/ha in combination with bentazon at 420 g/ha may be safely applied to soybean for broadleaf weed control.

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