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Interaction of Acifluorfen with Fluazifop for Annual Grass Control

Published online by Cambridge University Press:  12 June 2017

John L. Godley  and
Lynn M. Kitchen
John L. Godley
Affiliation:
Dep. Plant Pathol. and Crop Physiol., Louisiana State Univ. Agric. Center, Louisiana Agric. Exp. Stn., Baton Rouge, LA 70803
Lynn M. Kitchen
Affiliation:
Dep. Plant Pathol. and Crop Physiol., Louisiana State Univ. Agric. Center, Louisiana Agric. Exp. Stn., Baton Rouge, LA 70803
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Abstract

In field and greenhouse studies, tank mixing 0.3 and 0.4 kg ai/ha of the butyl ester of fluazifop {(±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acid} with 0.4 kg ai/ha of acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid} reduced control of large crabgrass [Digitaria sanguinalis (L.) Scop. # DIGSA] and itchgrass (Rottboellia exaltata L.f. # ROOEX) compared to fluazifop applied alone in soybeans [Glycine max (L.) Merr.]. Less antagonism between the two herbicides was observed in a year when conditions were optimum for large crabgrass control with fluazifop. Application of acifluorfen 1 to 3 days before application of fluazifop decreased large crabgrass control. Antagonism between fluazifop and acifluorfen was avoided when fluazifop was applied 3 to 5 days before acifluorfen. No antagonism was observed when fluazifop at 0.3 or 0.4 kg/ha was tank mixed with acifluorfen at 0.4 kg/ha for control of itchgrass. Itchgrass was more susceptible to fluazifop than large crabgrass.

Keywords

Sequential treatmentstank mixtureantagonismDIGSAROOEX
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 6 , November 1986 , pp. 936 - 941
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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