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Effect of Nonylphenol Ethoxylation on the Biological Activity of Three Herbicides with Different Water Solubilities

Published online by Cambridge University Press:  12 June 2017

Jerry M. Green
Jerry M. Green*
Affiliation:
DuPont Agricultural Products. Stine-Haskell Research Center. P.O. Box 30, Newark, DE 19714. E-mail: jerry.m.green@usa.dupont.com
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Abstract

Changing the number of ethylene oxide (EO) units on a nonylphenol surfactant changes its physicochemical and biological properties. Increasing the number of EO units makes the surfactant more hydrophilic and increases its hydrophilic-lipophilic balance (HLB). Surfactants with high HLB values, more than 16, were the most active with the hydrophilic herbicide glyphosate. More lipophilic surfactants with HLB values from 11 to 13 were more active with the lipophilic herbicide, the ethyl ester of quizalofop-P. Surfactants with intermediate HLB values were the most active with the herbicide that had intermediate water solubility, nicosulfuron. Matching the physicochemical properties of the herbicide and surfactant improved biological efficacy on giant foxtail.

Keywords

Glyphosate, N-(phosphonomethyl)glycinenicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl) amino]carbonyl]sulfonyl]-N, N-dimethyl-3-pyridinecarboxamidequizalofop-P, (R)-2-[4-[6-chloro-2-quinoxalinyl)oxy]phenoxy] propanoic acidgiant foxtail, Setaria faberi HerrmAdjuvantnonionic surfactantEO, ethylene oxideHLB, hydrophilic-lipophilic balance
Type
Notes
Information
Weed Technology , Volume 13 , Issue 4 , December 1999 , pp. 840 - 842
Copyright
Copyright © 1999 by the Weed Science Society of America 

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References

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