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Light Requirement of the Diphenylether Herbicide Oxyfluorfen

Published online by Cambridge University Press:  12 June 2017

D. E. Vanstone  and
E. H. Stobbe
D. E. Vanstone
Affiliation:
Agric. Canada Res. Stn., Morden, Manitoba, Canada R0G 1J0, Univ. of Manitoba, Winnipeg, Canada R3T 2N2
E. H. Stobbe
Affiliation:
Agric. Canada Res. Stn., Morden, Manitoba, Canada R0G 1J0, Univ. of Manitoba, Winnipeg, Canada R3T 2N2
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Abstract

Herbicidal activity of foliar-applied oxyfluorfen [2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene] was light dependent in buckwheat (Fagopyrum esculentum Moench. ‘Tokyo’). Plants were not injured when placed in the dark for as long as 4 days after herbicide treatment. When these plants were brought to the light, injury occurred, albeit more slowly than when plants were placed in the light immediately after treatment. The rate of injury increased as light intensity increased. The most effective wave length was 565 to 615 ηm, suggesting the involvement of a pigment with its absorption spectrum in this region. Chlorophyll content was not reduced by oxyfluorfen. Preliminary evidence suggests that photosynthesis was affected only after membrane integrity was disrupted.

Keywords

Fagopyrum esculentumchlorophyllphotosynthesis
Type
Research Article
Information
Weed Science , Volume 27 , Issue 1 , January 1979 , pp. 88 - 91
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

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