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Loss of Metribuzin and Ethyl-metribuzin from Glass and Soil Surfaces

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 loss of metribuzin and ethyl-metribuzin from soil and glass surfaces was studied to determine if volatilization and/or photodegradation could explain inconsistent weed control with these herbicides. In growth chamber experiments, phytotoxicity of ethyl-metribuzin decreased as the time between surface application and initial watering increased. Approximately 50% of the applied metribuzin and ethyl-metribuzin volatilized from soil within 24 h, with an additional 15 to 20% lost during the next 11 days, except about 5% additional ethyl-metribuzin was lost from Chehalis sandy loam. Both herbicides volatilized more rapidly from glass than from soil, with 75 to 90% of the loss occurring within 24 h and as great as 99% loss after 12 days. Loss by photodecomposition from soil or glass surfaces was minimal.

Keywords

Metribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-l,2,4-triazin-5(4H)-oneethyl-metribuzin, 4-amino-6-(1,1-dimethyl-ethyl)-3-(ethylthio)-1,2,4-triazin-5(4H)-onePhotodecompositionvolatilizationbioassayirrigation timing
Type
Research
Information
Weed Technology , Volume 3 , Issue 1 , March 1989 , pp. 173 - 176
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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