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Effect of Application Factors on Postemergence Phytotoxicity of Fluazifop-butyl, Haloxyfop-methyl, and Sethoxydim

Published online by Cambridge University Press:  12 June 2017

Douglas D. Buhler  and
Orvin C. Burnside
Douglas D. Buhler
Affiliation:
Dep. Agron., Univ. of Nebraska, Lincoln, NE 68583
Orvin C. Burnside
Affiliation:
Dep. Agron., Univ. of Nebraska, Lincoln, NE 68583
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Abstract

Phytotoxicity of fluazifop-butyl {butyl 2-[4-[(5-trifluoromethyl)-2-pyridinyl)oxy] phenoxy] propanoate}, haloxyfop-methyl {methyl 2-[4-[(3-chloro-5-(trifluoromethyl)-2-pyridinyl)oxy)phenoxy] propanoate}, and sethoxydim {2-[1-ethoxyimino)-butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} increased as carrier volume was decreased from 570 to 24 L/ha. Addition of crop oil concentrate to the spray solution increased phytotoxicity, especially at carrier volumes of 190 L/ha and above. Sorghum plants were treated with the same amount of active ingredient in a single 1-, 2-, 4-, 8-, 16-, or 24-μl droplet. Smaller, more concentrated droplets were more phytotoxic than larger, more dilute droplets, with or without crop oil concentrate. Application site of single herbicide droplets also influenced phytotoxicity. In general, application of concentrated droplets to metabolically active leaf tissue resulted in maximum phytotoxicity.

Keywords

Adjuvantscarrier volumecrop oil concentrate
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 5 , September 1984 , pp. 574 - 583
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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