Control of common cocklebur (Xanthium strumarium L.) with pre- and postemergence herbicides in soybean

2008 ◽  
Vol 88 (6) ◽  
pp. 1127-1131
Author(s):  
P. H. Sikkema ◽  
C. Kramer ◽  
J. D. Vyn ◽  
N. Soltani
Keyword(s):  
Glycine Max ◽  
Key Words ◽  
Weed Control ◽  
Dry Weight ◽  
Field Trials ◽  
Xanthium Strumarium ◽  
Glycine Max L ◽  
Excellent Control ◽  
Reduced Density ◽  
Postemergence Herbicides

Field trials were conducted in 2006 and 2007 on three Ontario farms with heavy infestations of cocklebur to determine the effectiveness of various preemergence (PRE) and postemergence (POST) herbicides for control of cocklebur in soybean [Glycine max (L.) Merr.]. There was minimal injury (2% or less) to soybean from the PRE and POST herbicides evaluated. Cloransulam applied PRE provided up to 98% visual control, reduced density 93%, and reduced dry weight of cocklebur 96%. Linuron, metribuzin, imazethapyr, and clomazone applied PRE provided 0 to 77% control and reduced density and dry weight of cocklebur minimally (54% or less) compared with the weedy check. Cloransulam applied POST provided as much as 98% control, reduced density up to 96%, and reduced dry weight of cocklebur as much as 98%. Chlorimuron, imazethapyr, imazethapyr plus bentazon, and glyphosate applied POST provided 49 to 90% control, reduced density 62 to 89%, and reduced dry weight of cocklebur 69 to 92%. Acifluorfen, fomesafen, bentazon, and thifensulfuron applied POST provided 1 to 51% control, reduced density 0 to 80%, and reduced dry weight 0 to 74% compared with the weedy check. Soybean yield increased as much as 79% compared with the weedy check as a result of cloransulam applied PRE or POST. Based on these results, cloransulam applied PRE or POST provides excellent control of cocklebur in soybean. Key words: Cocklebur, weed control, soybean, preemergence herbicide, postemergence herbicide

Control of common cocklebur (Xanthium strumarium L.) in corn

2010 ◽  
Vol 90 (6) ◽  
pp. 933-938 ◽  
Author(s):  
N. Soltani ◽  
C. Shropshire ◽  
P.H. Sikkema
Keyword(s):  
Environmental Conditions ◽  
Dry Weight ◽  
Field Trials ◽  
Xanthium Strumarium ◽  
Corn Yield ◽  
Shoot Dry Weight ◽  
Herbicide Treatments ◽  
Excellent Control

Nine field trials (five with PRE and four with POST herbicides) were conducted in 2006 to 2009 on various Ontario farms with heavy common cocklebur infestations to determine the effectiveness of PRE and POST herbicides for the control of common cocklebur in corn. There was no commercially significant corn injury from the PRE herbicides evaluated. Saflufenacil, saflufenacil/dimethenamid-p, isoxaflutole + atrazine, mesotrione + atrazine and dicamba/atrazine, applied PRE provided 85, 85, 76, 73 and 67% control of common cocklebur in corn 8 wk after emergence (WAE), respectively. Common cocklebur shoot dry weight was reduced 84, 80, 79, 75 and 68% with saflufenacil/dimethenamid-p, isoxaflutole + atrazine, mesotrione + atrazine, saflufenacil and dicamba/atrazine, respectively. There was no effect on corn yield compared with the weedy control with the PRE herbicides evaluated. The application of 2,4-D/atrazine POST resulted in unacceptable injury (28%) in corn. Dicamba/atrazine, dicamba/diflufenzopyr, dicamba and mesotrione + atrazine provided up to 98, 95, 90 and 90% control of common cocklebur 8 wk after application (WAA), respectively. All POST herbicide treatments increased corn yield compared with the non-treated control. Saflufenacil and saflufenacil/dimethenamid-p applied PRE and dicamba, dicamba/diflufenzopyr, dicamba/atrazine or mesotrione + atrazine applied POST have potential to provide good to excellent control of common cocklebur in corn under Ontario environmental conditions.

scholarly journals Simulated mesotrione drift followed by glyphosate, imazethapyr, bentazon or glyphosate plus chlorimuron in soybean

2009 ◽  
Vol 89 (2) ◽  
pp. 265-272
Author(s):  
L. R. Brown ◽  
D. E. Robinson ◽  
K. Chandler ◽  
C. J. Swanton ◽  
R. E. Nurse ◽  
...  
Keyword(s):  
Glycine Max ◽  
Key Words ◽  
Plant Height ◽  
Seed Yield ◽  
Plant Density ◽  
Dry Weight ◽  
Shoot Dry Weight ◽  
Glycine Max L ◽  
Herbicide Drift

There have been anecdotal accounts of increased crop sensitivity due to herbicide drift followed by an in-crop herbicide. An experiment was conducted from 2005 to 2007 at Elora, Ridgetown, and Woodstock, Ontario, to determine the effects of simulated mesotrione drift followed by in-crop applications of glyphosate, imazethapyr, bentazon and glyphosate plus chlorimuron on glyphosate-resistant soybean [Glycine max (L.) Merr.] visual injury, plant height, plant density, shoot dry weight, and seed yield. As the rate of simulated mesotrione drift increased, there was an increase in soybean injury and a decrease in shoot dry weight, height, and yield. Simulated mesotrione drift followed by bentazon resulted in synergistic responses in injury shortly after application in some environments. This increase in injury was transient, with no synergistic responses in density, shoot dry weight, and yield. In contrast, antagonistic responses were observed when glyphosate, imazethapyr, or glyphosate plus chlorimuron were applied after simulated mesotrione drift in some environments. Further research is required to develop a better understanding of the interactions of drift followed by the application of an in-crop herbicide. Key words: Bentazon, chlorimuron, glyphosate, imazethapyr, mesotrione, synergism

Control of herbicide-resistant common waterhemp (Amaranthus tuberculatus var. rudis) with pre- and post-emergence herbicides in soybean

2007 ◽  
Vol 87 (1) ◽  
pp. 175-182 ◽  
Author(s):  
J. D. Vyn ◽  
C. J. Swanton ◽  
S. E. Weaver ◽  
P. H. Sikkema
Keyword(s):  
Glycine Max ◽  
Photosystem Ii ◽  
Key Words ◽  
Yield Losses ◽  
Common Waterhemp ◽  
Herbicide Resistant ◽  
Glycine Max L ◽  
Amaranthus Tuberculatus ◽  
Postemergence Herbicides ◽  
Weed Emergence

Common waterhemp was first identified in Ontario in 2002. Eight trials were conducted ove r a 3-yr period (2003-2005) at Cottam and Petrolia, Ontario to determine the efficacy of various preemergence and postemergence herbicides for the control of herbicideresistant waterhemp in soybean [ Glycine max (L.) Merr.]. Waterhemp was resistant to the a cetolactate synthase-inhibiting herbicides at both locations and to the photosystem II-inhibiting herbicides at Petrolia; therefore, results varied by location. Results at Petrolia also varied across years. Waterhemp interference resulted in soybean yield losses of up to 73% in weedy versus weed-free checks. Preemergence-applied metolachlor, dimethenamid, and linuron provided greater than 80% control and metolachlor plus metribuzin 94% or greater control of waterhemp 70 d after emergence at both locations. Acifluorfen, fomesafen, imazamox plus fomesafen, and glyphosate applied postemergence resulted in 87% or greater waterhemp control 70 d after application at Cottam in 2003 and 2004 and at Petrolia in 2004; however, waterhemp control with these herbicides was only 60 to 66% at Petrolia in 2005 due to prolonged weed emergence. Multiple herbicide applications per season may be required for effective waterhemp control in soybean. Key words:

PHYSIOLOGICAL STUDIES OF HIGHER YIELD IN NEW, EARLY-MATURING SOYBEAN CULTIVARS

1980 ◽  
Vol 60 (4) ◽  
pp. 1315-1326 ◽  
Author(s):  
B. A. McBLAIN ◽  
D. J. HUME
Keyword(s):  
Glycine Max ◽  
Dry Matter ◽  
Dry Weight ◽  
Field Trials ◽  
Maturity Group ◽  
Early Maturing ◽  
Glycine Max L ◽  
Seed Yields ◽  
New Cultivars ◽  
Desirable Trait

The physiology of three soybean (Glycine max (L). Merrill) cultivars of Maturity Group 00 was studied to determine why the new cultivars Maple Arrow and McCall outyield the older cultivar Altona. Field trials were conducted at Elora, Ontario, in 1977 and 1978. The seed yields of the new cultivars averaged 12% higher than Altona over both years, although the three cultivars were within 3 days of the same maturity. The higher yields in the new cultivars appeared to be related to consistently longer bean-filling periods than in Altona, although a difference (P < 0.05) was detected only in 1978. Rates of bean filling in the new cultivars were no greater than in Altona, which also indicated that longer bean-filling periods contributed to higher yields in the new cultivars. Flowering dates for cultivars were not different. Similar maturity dates indicated that the new cultivars had shorter periods than Altona from maximum bean dry weight to final maturity. Other attributes differed little among cultivars in either year. Total dry matter accumulations were similar until bean filling began. Leaflet areas and dry weights, leaf area durations and harvest indices also did not differ. The results suggested that a long bean-filling period was a desirable trait in early-maturing soybeans.

Efficacy of imazethapyr application timing on the control of long-spined sandbur [Cenchrus longispinus (Hack. in Kneuck.] Fernald) in soybean

2009 ◽  
Vol 89 (1) ◽  
pp. 207-210
Author(s):  
N. Soltani ◽  
J. D. Vyn ◽  
C. Kramer ◽  
P. H. Sikkema
Keyword(s):  
Glycine Max ◽  
Key Words ◽  
Weed Control ◽  
Crop Yield ◽  
Application Timing ◽  
Leaf Stage ◽  
Glycine Max L

An experiment was conducted in 2005 and 2006 in southwestern Ontario to examine the efficacy of imazethapyr application timing on the control of long-spined sandbur in soybean (Glycine max L. Merr.). Imazethapyr (100 g a.i. ha-1) was applied early and delayed preemergence (PRE), and postemergence (POST) at the spike to five-leaf stage of the weed. Soybean was not injured by any treatment. Imazethapyr applied PRE did not control long-spined sandbur; POST treatments resulted in up to 72, 66, 78, 91, 78, and 71% weed control when applied at the spike, one-, two-, three-, four-, and five-leaf stage, respectively, and crop yield increased 44, 28, 39, 24, 38, and 20%, respectively. Therefore, imazethapyr should be applied at the three-leaf stage of the weed to optimize control and crop yield. Key words: Weed control, soybean, preemergence herbicide, postemergence herbicide

Control of glyphosate-resistant Canada fleabane [Conyza canadensis (L.) Cronq.] with preplant herbicide tankmixes in soybean [Glycine max. (L). Merr.]

2013 ◽  
Vol 93 (4) ◽  
pp. 659-667 ◽  
Author(s):  
Holly P. Byker ◽  
Nader Soltani ◽  
Darren E. Robinson ◽  
François J. Tardif ◽  
Mark B. Lawton ◽  
...  
Keyword(s):  
Glycine Max ◽  
Seed Production ◽  
Field Trials ◽  
Effective Control ◽  
Conyza Canadensis ◽  
Glycine Max L ◽  
Excellent Control

Byker, H. P., Soltani, N., Robinson, D. E., Tardif, F. J., Lawton, M. B. and Sikkema, P. H. 2013. Control of glyphosate-resistant Canada fleabane [ Conyza canadensis (L.) Cronq.] with preplant herbicide tankmixes in soybean [ Glycine max . (L). Merr.]. Can. J. Plant Sci. 93: 659–667. Glyphosate previously provided excellent control of Canada fleabane; however, with the evolution of glyphosate-resistant (GR) Canada fleabane in Ontario, alternative herbicides must be identified for control of this weed in soybean. The objective of this study was to identify preplant herbicide tankmixes that provide effective control of GR Canada fleabane. A total of 12 field trials were completed over a 2-yr period (2011, 2012) in fields previously confirmed with GR Canada fleabane. Preplant tankmixes of glyphosate (900 g a.e. ha−1) plus saflufenacil (25 g a.i. ha−1) or saflufenacil/dimethenamid-p (245 g a.i. ha−1) provided greater than 87% control 4 wk after application (WAA) across all sites. Glyphosate (900 g a.e. ha−1) tankmixed with metribuzin (1120 g a.i. ha−1), cloransulam-methyl (35 g a.i. ha−1) or flumetsulam (70 g a.i. ha−1) provided 78 to 99% control 8 WAA. Control of GR Canada fleabane prior to soybean emergence is essential as currently there are no herbicides that provide acceptable control in-crop. Because of the lack of in-crop options, spring residual herbicides may be required for season long control in regions where Canada fleabane emerges throughout the year to reduce Canada fleabane seed production and populations in subsequent years.

scholarly journals Effect of Weed Management Practices on Weed Control, Yield and Economics of Soybean [Glycine max (L.) Merrill]

2020 ◽  
pp. 114-120
Author(s):  
R. K. Raj ◽  
K. K. Sinha ◽  
Shalu Kumari ◽  
Anup Kumar Choubey ◽  
Ashok Pandit ◽  
...  
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Dry Weight ◽  
Cost Ratio ◽  
Control Efficiency ◽  
Weed Control Efficiency ◽  
Glycine Max L ◽  
Hand Weeding

The experiment was laid out Tirhut College of Agriculture, farm Dholi, Muzaffarpur, Bihar during kharif season 2016, to study the effect of weed management practices on weed control, yield and economics of soybean [Glycine max (L.)]. Hand weeding twice at 25 and 45 DAS was found most effective to control weeds in soybean and recorded lowest weed count, weed dry matter and highest weed control efficiency. Among herbicide, application of Pendimethalin 1.0 kg/ha as PE (Pre-emergance) and Imazethapyr 55 g/ha as PoE (Post-emergance) at 25 DAS was found to be more efficient and cost effective to reduce weed population/m2 (53.94 & 67.22), dry weight of weeds/m2 (21.16 & 45.86 g) an increased weed control efficiency (53.86 & 68.83%) significantly in both the stages 30 and 60 DAS. Beside it, Pendimethalin 1.0 kg/ha + Imazethapyr 55 g/ha at 25 DAS, Pendimethalin 1.0 kg/ha + one hand weeding at 40 DAS and hand weeding twice at 25 and 45 DAS were equally efficient in increasing the grain yield, straw yield, weed index and gross returns than control but net returns (39870/ha) and benefit-cost ratio (1.70) was obtained maximum only with Pendmethalin 1.0 kg/ha and Imazethapyr 55 g/ha at 25 DAS.

DH3604 soybean

2006 ◽  
Vol 86 (2) ◽  
pp. 483-484 ◽  
Author(s):  
Elroy R. Cober ◽  
Harvey D. Voldeng ◽  
Judith A. Frégeau-Reid ◽  
Ronald J. D. Guillemette
Keyword(s):  
Glycine Max ◽  
Key Words ◽  
Soybean Cultivar ◽  
Heat Unit ◽  
Glycine Max L ◽  
Cultivar Description

DH3604 is a 2700 crop heat unit soybean [Glycine max (L.) Merr.] cultivar developed for natto soyfood production. Key words: Soybean, cultivar description, natto

AC Albatros soybean

1996 ◽  
Vol 76 (1) ◽  
pp. 151-152
Author(s):  
H. D. Voldeng ◽  
R. J. D. Guillemette ◽  
D. A. Leonard ◽  
E. R. Cober
Keyword(s):  
Glycine Max ◽  
Key Words ◽  
Good Yield ◽  
Soybean Cultivar ◽  
Yield Potential ◽  
Heat Unit ◽  
Glycine Max L ◽  
Cultivar Description

AC Albatros is a 2500 crop heat unit soybean [Glycine max (L.) Merr.] cultivar with good yield potential. Key words: Soybean, cultivar description

NattoKing K87 soybean

1991 ◽  
Vol 71 (3) ◽  
pp. 863-864
Author(s):  
N. R. Bradner ◽  
R. D. Simpson ◽  
A. A. Hadlock
Keyword(s):  
Glycine Max ◽  
Key Words ◽  
Maturity Group ◽  
Group I ◽  
Glycine Max L ◽  
Cultivar Description

NattoKing K87, a Maturity Group I soybean (Glycine max (L.) Merr.) cultivar, yields more, has smaller seeds, lodges less and matures later than Canatto. Key words: Glycine max, NattoKing K87 cultivar, cultivar description, soybean

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