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Benazolin and Admixtures for Common Cocklebur (Xanthium pensylvanicum) and Prickly Sida (Sida spinosa) Control in Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Robert H. Walker ,
Eddie R. Jolley ,
John A. McGuire  and
Don S. Murray
Robert H. Walker
Affiliation:
Dep. Agron. and Soils
Eddie R. Jolley
Affiliation:
Dep. Agron. and Soils
John A. McGuire
Affiliation:
Res. Data Analysis, Alabama Agric. Exp. Stn. Auburn, AL 36849
Don S. Murray
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
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Abstract

Benazolin (4-chloro-2-oxobenzothiazolin-3-ylacetic acid) formulated as the dimethylamine salt was evaluated for common cocklebur (Xanthium pensylvanicum Wallr.) and prickly sida (Sida spinosa L.) control in soybeans [Glycine max (L.) Merr.] between 1977 and 1979. Benazolin was applied alone or in admixtures with acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid}, bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-4 (3H)-one 2,2-dioxide], dinoseb (2-sec-butyl-4,6-dinitrophenol) plus naptalam (N-1-naphthylphthalamic acid), and 2,4-DB [4-(2,4-dichlorophenoxy)butyric acid] over-the-top of soybeans {V3 to V12 [V(N); vegetative stage with “N” nodes on the main stem beginning with the unifoliolate node]}. Benazolin effectively controlled common cocklebur at rates of 0.2 and 0.4 kg/ha. Soybean tolerance was acceptable even with a repeat application of 0.4 kg/ha. Early-season (July) control was less than late season (August) because it took 2 to 3 weeks for benazolin to kill common cocklebur. Prickly sida control was poor with benazolin even at 0.6 kg/ha. Soybean tolerance and seed yields were higher when soybeans were treated with admixtures of benazolin plus bentazon than with benazolin alone. Antagonism was observed with this admixture for prickly sida and late-season common cocklebur control. Antagonism was eliminated with ratios of benazolin to bentazon of 1 to 3 applied in a single application or a 1 to 1.5 ratio repeated.

Keywords

Postemergence herbicidesacifluorfendinoseb plus naptalam2,4-DBbentazon
Type
Research Article
Information
Weed Science , Volume 30 , Issue 1 , January 1982 , pp. 50 - 53
Copyright
Copyright © 1982 by the Weed Science Society of America 

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References

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