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Varying Surfactant Type Changes Quizalofop-P Herbicidal Activity

Published online by Cambridge University Press:  12 June 2017

Jerry M. Green
Jerry M. Green*
Affiliation:
DuPont Agricultural Products, Stine-Haskell Research Center, Newark, DE 19714-0030
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Abstract

Varying the type of nonionic surfactant greatly changed the biological activity of the ethyl ester of quizalofop-P on giant foxtail, barnyardgrass, and corn. These studies statistically evaluated 22 surfactants with widely different chemical, physical, and surface properties. Of the 14 surfactant properties analyzed, dynamic surface tension was the most important to enhance quizalofop-P activity. Alcohol ethoxylate surfactants like Genapol® 24-L-92 and Tergitol® 15-S-7 were among the most effective adjuvants. These surfactants performed significantly better than the commercial nonionic surfactant, Induce®, and equal to a high-quality petroleum crop oil concentrate, Agri-dex®. These surfactants offer a lower dose option to crop oil concentrates and a more effective surfactant alternative for mixtures that prohibit crop oil concentrates.

Keywords

Quizalofop-P, (R)-2-[4-[(6-chloro-2-quinoxalinyl)oxy]phenoxy]propanoic acidbarnyardgrass, Echinochloa crus-galli (L.) Beauv. # ‘ECHCGgiant foxtail, Setaria faberi Herrm. # SETFAcorn, Zea mays L.Dynamic surface tensionadjuvantalcohol ethoxylatecrop oil concentratemaizesoybeanNIS, nonionicCOC, crop oil concentrateGR50, herbicide rate that controls weeds 50%
Type
Research
Information
Weed Technology , Volume 11 , Issue 2 , June 1997 , pp. 298 - 302
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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