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Absorption, Translocation, and Phytotoxicity of Chlorimuron and 2,4-Db Mixtures in Peanut (Arachis Hypogaea) and Selected Weed Species

Published online by Cambridge University Press:  12 June 2017

Glenn R. Wehtje
Affiliation:
Dep. Agron. and Soils, and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849
John W. Wilcut
Affiliation:
Dep. Agron., Box 748, Coastal Plain Exp. Stn., Univ. Georgia, Tifton, GA 31793-0748
John A. Mcguire
Affiliation:
Res. Data Analysis and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849. Alabama Agric. Exp. Stn. J. Ser. No. 3-913221

Abstract

Mixtures of chlorimuron and 2,4-DB were additive with respect to crop injury and were either additive or slightly antagonistic with respect to weed control in greenhouse experiments. Absorption and translocation of 14C following application of 14C-chlorimuron and 14C-2,4-DB were not affected by the presence of the other unlabeled herbicide, except in Florida beggarweed and peanut where 2,4-DB affected distribution of 14C-chlorimuron in the treated leaf. In field studies, maximum efficacy was obtained with mixtures of chlorimuron plus 2,4-DB applied 7 or 9 wk after planting. Florida beggarweed control was greatest with chlorimuron or chlorimuron mixtures while the addition of 2,4-DB to chlorimuron improved morningglory and sicklepod control. At 9 and 11 wk after planting, addition of 2,4-DB to chlorimuron controlled Florida beggarweed better than chlorimuron alone. Peanut yields were increased by the addition of 2,4-DB at later applications.

Type
Weed Biology and Ecology
Copyright
Copyright © 1993 by the Weed Science Society of America 

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