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Absorption, Translocation, and Metabolism of Clomazone, Metribuzin and Linuron in Soybean (Glycine max) and Common Cocklebur (Xanthium strumarium)

Published online by Cambridge University Press:  12 June 2017

Frederick P. Salzman ,
Karen A. Renner  and
Donald Penner
Frederick P. Salzman
Affiliation:
Dep. Crop and Soil Sci., Michigan State Univ., E. Lansing, MI 48824
Karen A. Renner
Affiliation:
Dep. Crop and Soil Sci., Michigan State Univ., E. Lansing, MI 48824
Donald Penner
Affiliation:
Dep. Crop and Soil Sci., Michigan State Univ., E. Lansing, MI 48824
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Abstract

Research was conducted in soybean and common cocklebur to determine if the synergistic interactions of clomazone plus metribuzin and clomazone plus linuron were due to the effect of one herbicide on root uptake, partitioning, or metabolism of the other. Treatments consisted of 14C-clomazone alone and combined with metribuzin or linuron, 14C-metribuzin alone and combined with clomazone, and 14C-linuron alone and combined with clomazone. Root uptake and partitioning of clomazone applied alone in soybean differed compared to clomazone plus metribuzin. Root uptake and partitioning of metribuzin or linuron did not differ when applied alone or combined with clomazone. Binding of clomazone or its metabolites in an unextractable form may be a method of deactivating clomazone by soybean, but not by common cocklebur. Levels of parent clomazone were higher in common cocklebur roots when clomazone was combined with metribuzin and linuron compared to clomazone done. Levels of parent metribuzin were higher in soybean roots, and in common cocklebur roots and shoots when clomazone was combined with metribuzin compared to metribuzin alone. Levels of parent linuron were greater in soybean shoots when linuron was applied with clomazone compared to linuron alone. These results indicate that the metabolism of metribuzin and linuron is altered in both species when clomazone is applied, leading to increased phytotoxicity.

Keywords

Clomazone, 2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinonelinuron, N′-(3,4-dichlorophenyl)-N-methoxy-N-methylureametribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-onecommon cocklebur, Xanthium strumarium L. # XANSTsoybean, Glycine max (L.) ‘Century’Interactionsynergism
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 40 , Issue 3 , September 1992 , pp. 395 - 401
Copyright
Copyright © 1992 by the Weed Science Society of America 

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References

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