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Translocation of Glyphosate and Quizalofop and Metabolism of Quizalofop in Quackgrass Biotypes (Elytrigia repens)

Published online by Cambridge University Press:  12 June 2017

François J. Tardif  and
Gilles D. Leroux
François J. Tardif
Affiliation:
Dep. Plant Sci., Laval Univ., Cité Universitaire, Québec, Canada G1K 7P4
Gilles D. Leroux
Affiliation:
Dep. Plant Sci., Laval Univ., Cité Universitaire, Québec, Canada G1K 7P4
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Abstract

An experiment was conducted to evaluate the translocation pattern of 14C-glyphosate and 14C-quizalofop in five quackgrass biotypes at two stages of growth. Whole plant translocation differed between stages for each herbicide. The percentage of 14C-glyphosate and 14C-quizalofop in the leafwash and in the treated leaf did not differ among biotypes, but differences occurred for the translocation to the underground parts. The partitioning of the 14C-glyphosate and 14C-quizalofop in the treated crown, other crowns, propagating rhizomes, and other rhizomes differed among biotypes. On a disintegration per minute (DPM) mg-1 basis, differences among biotypes were found with 14C-glyphosate but much less with 14C-quizalofop. Metabolism of 14C-quizalofop in the treated leaf was similar in the two biotypes tested except for the percentage of polar metabolites 1 d after treatment. The percentage of 14C-quizalofop available for translocation was the same in both biotypes.

Keywords

Glyphosate, N-(phosphonomethyl)glycinequizalofop, (±)-2-[4-[(6-chloro-2-quinoxalinyl)oxy] phenoxy]propanoic acidquackgrass, Elytrigia repens (L.) Nevski. ♯ AGRRESystemic herbicidesrhizomeperennial weedAgropyron repensAGRRE
Type
Research
Information
Weed Technology , Volume 5 , Issue 3 , September 1991 , pp. 525 - 531
Copyright
Copyright © 1991 Weed Science Society of America 

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