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Influence of Soybean Oil Carrier and Method of Application on Weed Control in Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Van E. Banks ,
Lawrence R. Oliver  and
Marilyn McClelland
Van E. Banks
Affiliation:
Dep. Agron., Univ. Arkansas, Fayetteville, AR 72703
Lawrence R. Oliver
Affiliation:
Dep. Agron., Univ. Arkansas, Fayetteville, AR 72703
Marilyn McClelland
Affiliation:
Dep. Agron., Univ. Arkansas, Fayetteville, AR 72703
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Abstract

Acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid} and bentazon [3-(1-methylethyl-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] plus acifluorfen were applied through hydraulic flat-fan nozzles or controlled-droplet applicators (CDA) in water plus surfactant, soybean [Glycine max (L.) Merr.] oil and water emulsions, and soybean oil alone. Except for inadequate weed control with CDA applications at 7 L/ha, method of application did not affect weed control of common cocklebur (Xanthium strumarium L. #3 XANST) or smooth pigweed (Amaranthus hybridus L. # AMACH) at high rates of bentazon plus acifluorfen (560 plus 280 g ai/ha or above). With low rates (280 plus 140 g/ha or less), hydraulic flat-fan nozzles were more effective than CDA applications. Early CDA applications of acifluorfen in an oil carrier at a volume of 9 L/ha were as effective as hydraulic nozzle applications at a carrier volume of 47 L/ha. Later applications resulted in inadequate weed control. Increasing soybean oil concentration from 2.5 to 40% (v/v) in acifluorfen spray mixtures did not significantly increase the phytotoxicity of acifluorfen.

Keywords

Adjuvantshydraulic nozzlestiming of applicationCDAacifluorfenbentazonGlycine maxXANSTAMACH
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 36 , Issue 4 , July 1988 , pp. 504 - 509
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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