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The Light Requirement for Herbicidal Activity of Diphenyl Ethers

Published online by Cambridge University Press:  12 June 2017

Omosuyi Fadayomi  and
G.F. Warren
Omosuyi Fadayomi
Affiliation:
Dep. of Hortic.
G.F. Warren
Affiliation:
Dep. of Hortic.
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Abstract

Light after treatment was found to be required for the herbicidal activity of nitrofen (2,4-dichlorophenyl-p-nitrophenyl ether) and oxyfluorfen [2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene] following postemergence applications of both herbicides to greenbean (Phaseolus vulgaris L. ‘Spartan Arrow’). The effect of photosynthate and/or light before treatment was investigated. A 24-hr dark period prior to postemergence treatment of the bean seedlings had no effect on herbicidal activity when light followed treatment. The effect of plant pigments on the activity of both herbicides was studied using mutants of corn (Zea mays L.) and soybean [Glycine max (L.) Merr.]. A white mutant of corn was much more resistant to the herbicides than a greenish-yellow mutant or the normal plant. A yellow mutant of soybean was equally as susceptible as the normal type. Studies with radiolabeled foliar applications of both herbicides showed no significant difference in translocation in the light or dark.

Type
Research Article
Information
Weed Science , Volume 24 , Issue 6 , November 1976 , pp. 598 - 600
Copyright
Copyright © 1977 by the Weed Science Society of America 

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References

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