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Absorption, Translocation, and Metabolism of Foliar-Applied Chlorimuron in Soybeans (Glycine max), Peanuts (Arachis hypogaea), and Selected Weeds

Published online by Cambridge University Press:  12 June 2017

John W. Wilcut ,
Glenn R. Wehtje ,
Michael G. Patterson ,
Tracy A. Cole  and
T. Vint Hicks
John W. Wilcut
Affiliation:
Dep. Agron. and Soils and AL Agric. Exp. Stn., Auburn Univ., AL 36849
Glenn R. Wehtje
Affiliation:
Dep. Agron. and Soils and AL Agric. Exp. Stn., Auburn Univ., AL 36849
Michael G. Patterson
Affiliation:
Dep. Agron. and Soils and AL Agric. Exp. Stn., Auburn Univ., AL 36849
Tracy A. Cole
Affiliation:
Dep. Agron. and Soils and AL Agric. Exp. Stn., Auburn Univ., AL 36849
T. Vint Hicks
Affiliation:
Dep. Agron. and Soils and AL Agric. Exp. Stn., Auburn Univ., AL 36849
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Abstract

Tolerance of species to foliar applications of the ethyl ester of chlorimuron as determined in greenhouse studies with 21-day-old seedlings was: soybean = peanut > prickly sida > sicklepod > Florida beggarweed > common cocklebur. Absorption of foliar-applied 14C-chlorimuron 72 h after application was similar in soybean, peanut, sicklepod, common cocklebur, and prickly sida, but much less in Florida beggarweed. Slight symplasmic and apoplasmic translocation of the herbicide was evident in all species. Metabolism of chlorimuron 72 h after application was greatest in soybean and least in common cocklebur. Species tolerance to chlorimuron was directly correlated (r2 = 0.93) to the amount of unmetabolized chlorimuron (dpm/g dry wt) in the plant. Peanut exhibited increased tolerance to chlorimuron with age; this result was attributed to reduced absorption and translocation and more extensive metabolism of the absorbed herbicide by older plants.

Keywords

Chlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino] carbonyl] amino] sulfonyl] benzoic acidsoybean, Glycine max (L.) Merr.; peanut, Arachis hypogaea L.sicklepod, Cassia obtusifolia L. ♯3 CASOBcommon cocklebur, Xanthium strumarium L. ♯ XANSTprickly sida, Sida spinosa L. ♯ SIDSPFlorida beggarweed, Desmodium tortuosum (SW.) DC. ♯DEDTOArachis hypogaeaGlycine maxCASOBDEDTOXANSTSIDSP
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 37 , Issue 2 , March 1989 , pp. 175 - 180
Copyright
Copyright © 1989 by the Weed Science Society of America 

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