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The Basis for Synergism between Barban and Flamprop on Wild Oat (Avena fatua)

Published online by Cambridge University Press:  12 June 2017

Mahendra P. Sharma ,
Fayaz A. Qureshi  and
William H. Vanden Born
Mahendra P. Sharma
Affiliation:
Weed Sci. Section, Alberta Environ. Ctr., Vegreville, Alberta, Canada TOB 4LO.
Fayaz A. Qureshi
Affiliation:
Weed Sci. Section, Alberta Environ. Ctr., Vegreville, Alberta, Canada TOB 4LO.
William H. Vanden Born
Affiliation:
Dep. Plant Sci., Univ. of Alberta, Edmonton, Alberta, Canada T6G 2P5
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Abstract

Absorption, translocation, and metabolism of the methyl ester of 14C-flamprop [N-benzoyl-N-(3-chloro-4-fluorophenyl)-DL-alanine] (hereafter referred to as flamprop-methyl) and 14C-barban (4-chloro-2-butynyl-m-chloro carbanilate) in wild oat (Avena fatua L.) were investigated to determine the basis of the synergistic interaction between the two herbicides. The mutual effects of the two herbicides were studied when they were applied together to wild oat at the two- and four-leaf stage. The addition of the commercial formulation of barban, barban formulation additives, technical barban, or the nonionic surfactant polyoxyethylene-6-tridecylether resulted in varying degrees of increase in the absorption of 14C-flamprop-methyl. Translocation of 14C-flamprop-methyl following leaf application in wild oat was mainly acropetal. The addition of commercial barban to 14C-flamprop-methyl did not influence the pattern of 14C translocation. Metabolism of flamprop-methyl by wild oat at either leaf stage was not influenced by barban. Absorption of 14C-barban was increased by the addition of the commercial formulation of flamprop-methyl and by polyoxyethylene-6-tridecylether. The addition of flamprop-methyl did not influence the pattern of translocation and metabolism of 14C-barban in wild oat at either leaf stage. It is concluded that increased absorption of flamprop-methyl and barban by wild oat at the two- and four-leaf stages is the most important factor in the synergistic interaction between these herbicides. Translocation and metabolism of the herbicides do not seem to be important factors in the synergism observed.

Keywords

Herbicide combinationsherbicide interactionspostemergence
Type
Research Article
Information
Weed Science , Volume 30 , Issue 2 , March 1982 , pp. 147 - 152
Copyright
Copyright © Weed Science Society of America 

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References

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