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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
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

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.

Type
Weed Control and Herbicide Technology
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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