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Retention, Absorption, and Loss of Foliage-Applied Metribuzin

Published online by Cambridge University Press:  12 June 2017

Daniel L. Devlin ,
David R. Gealy  and
Larry A. Morrow
Daniel L. Devlin
Affiliation:
Dep. Agron. and Soils, Washington State Univ., Pullman, WA 99164
David R. Gealy
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Washington State Univ., Pullman, WA 99164
Larry A. Morrow
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Washington State Univ., Pullman, WA 99164
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Abstract

Immediately following postemergence application, similar quantities of metribuzin [4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one] were retained on the foliage of downy brome (Bromus tectorum L. # BROTE) and winter wheat (Triticum aestivum L.). Three days following treatment, more metribuzin was present on the surface of the foliage of downy brome than of winter wheat and similar quantities of metribuzin had been absorbed into the interior of the foliage of both species. Fourteen days after treatment, metribuzin had disappeared from the surfaces of the foliage of both species but more metribuzin was present in the interior of the foliage of downy brome than of winter wheat. Results from petri dish studies in the field suggested that the amount of unaltered metribuzin available for absorption by leaves was influenced primarily by volatilization and secondarily by photodecomposition. In addition, small quantities of rainfall may have washed metribuzin from leaf surfaces. In 1984, yield of winter wheat was greater in metribuzin-treated plots than in nontreated check plots.

Keywords

Absorptionfoliar retentionnonionic surfactantvolatilizationphotodecompositionBromus tectorumTriticum aestivumBROTE
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 35 , Issue 6 , November 1987 , pp. 775 - 779
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

Literature Cited

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