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Metribuzin Degradation Kinetics in Organically Amended Soil

Published online by Cambridge University Press:  12 June 2017

Dennis R. Pettygrove  and
Denny V. Naylor
Dennis R. Pettygrove
Affiliation:
Dep. Plant, Soil, and Ent. Sci., Univ. of Idaho, Moscow, ID 83843
Denny V. Naylor
Affiliation:
Dep. Plant, Soil, and Ent. Sci., Univ. of Idaho, Moscow, ID 83843
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Abstract

The rates of degradation of metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one] were determined in an untreated Portneuf silt loam, in soil with added organic amendments, and in soil previously treated with metribuzin. While first-order rate kinetics generally described the degradation of the metribuzin in the soil, a quadratic expression was superior. Organic amendments were found to inhibit or accelerate the rate of breakdown of metribuzin depending upon the kind of amendment. Neither a lag phase nor an enrichment was observed from prior treatment with metribuzin.

Keywords

Herbicide dissipationorganic residues
Type
Soil, Air, and Water
Information
Weed Science , Volume 33 , Issue 2 , March 1985 , pp. 267 - 270
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

Literature Cited

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