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Effect of pH on Phytotoxicity of Metribuzin and Ethyl-metribuzin

Published online by Cambridge University Press:  12 June 2017

Daniel C. Peek  and
Arnold P. Appleby
Daniel C. Peek
Affiliation:
Dep. Crop Sci., Oreg. State Univ., Corvallis, OR 97331
Arnold P. Appleby
Affiliation:
Dep. Crop Sci., Oreg. State Univ., Corvallis, OR 97331
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Abstract

The influence of pH on the behavior of metribuzin and ethyl-metribuzin in soil and nutrient solution was studied. Toxicity of both herbicides to oats decreased as soil pH decreased from 8.4 to 4.2 in a sandy loam. Herbicide adsorption increased as soil pH decreased. In nutrient solution, pH did not change the phytotoxicity of either herbicide, indicating that pH primarily influences herbicide availability in soil and not plant uptake.

Keywords

Metribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-oneethyl-metribuzin, 4-amino-6-1,1 -dimethylethyl)-3-(ethylthio)-1,2,4-triazin-5(4H) -oneoats, Avena sativa L. ‘Cayuse’ ♯3 AVESABioassayBromus tectorumAVESABROTE
Type
Research
Information
Weed Technology , Volume 3 , Issue 4 , December 1989 , pp. 636 - 639
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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