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Effect of Adjuvants on Cucumber (Cucumis sativus) Sensitivity to Quizalofop1,2

Published online by Cambridge University Press:  12 June 2017

Michael A. Ruizzo  and
Stanley F. Gorski
Michael A. Ruizzo
Affiliation:
The Ohio State Univ., Dep. Hortic., Columbus, OH 43210
Stanley F. Gorski
Affiliation:
The Ohio State Univ., Dep. Hortic., Columbus, OH 43210
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Abstract

Cucumber [Cucumis sativus L. ‘Calypso′] susceptibility to the ethyl ester of quizalofop {2-[4-[(6-chloro-2-quinoxyalinyl)oxy] phenoxy] propanoic acid} was investigated under field and greenhouse conditions. Cucumber yield was significantly reduced under field conditions with a single or repeated application of quizalofop at 0.14 or 0.28 kg ai/ha. Under greenhouse conditions, quizalofop significantly suppressed cucumber plant fresh weight with or without the presence of an adjuvant. Enhancement of herbicide activity was related to the concentration of adjuvant. At a higher rate of quizalofop, addition of the lower concentration of an adjuvant increased the herbicidal effect (growth suppression and visually estimated phytotoxicity). At a lower concentration, increasing adjuvant concentration enhanced visually estimated phytotoxicity.

Keywords

Crop oil concentratenonionic surfactantpostemergence phytotoxicity
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 35 , Issue 4 , July 1987 , pp. 559 - 563
Copyright
Copyright © 1987 by the Weed Science Society of America 

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