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Phytotoxic Action of Desmedipham: Influence of Temperature and Light Intensity

Published online by Cambridge University Press:  12 June 2017

Gabor Bethlenfalvay  and
R. F. Norris
Gabor Bethlenfalvay
Affiliation:
Univ. of California at Davis, Davis, CA 95616
R. F. Norris
Affiliation:
Univ. of California at Davis, Davis, CA 95616
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Abstract

Inhibition of growth and photosynthesis in sugarbeet (Beta vulgaris L. var. ‘USH10’) treated with desmedipham [ethyl m-hydroxycarbanilate carbanilate (ester)] was most severe between 25 and 30 C and decreased with higher or lower temperatures. Transfer of sugarbeet plants grown at temperatures from 10 to 35 C to higher temperatures after treatment increased injury and photosynthetic inhibition. Higher temperatures prior to treatment reduced injury at all posttreatment temperatures. When the temperature was changed from 25 to 40 C, inhibition was most severe immediately after treatment. Two days after treatment this 15 C temperature change did not cause additional injury. High posttreatment light intensities caused greater inhibition of photosynthesis than low light intensities.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 6 , November 1975 , pp. 499 - 503
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

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