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Degradation of Pendimethalin in Soil

Published online by Cambridge University Press:  12 June 2017

Robert L. Zimdahl,
Pietro Catizone and
Ann C. Butcher
Robert L. Zimdahl
Affiliation:
Weed Res. Lab., Dep. Botany and Plant Pathol., Colorado State Univ., Fort Collins, CO 80523
Pietro Catizone
Affiliation:
Institute of General Agronomy and Cultivation of Field Crops, Univ. of Bologna, Bologna 40126, Italy
Ann C. Butcher
Affiliation:
Weed Res. Lab., Dep. Botany and Plant Pathol., Colorado State Univ., Fort Collins, CO 80523
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Abstract

Pendimethalin [N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine] degradation in three soils did not follow first-order kinetics but could be described by a quadratic model. Degradation increased as soil temperature increased in the order 10, 20, 35, and 30C. The rate was the same as 75 and 100% field capacity but slower at 50%. At the same temperature and soil moisture the influence of soil type was small. Based on chemical analysis of soil from field and laboratory studies, the half-life was approximately 47 days. Based on biological analyses of soil, the half-life was 78 to 111 days.

Keywords

Biological assayfirst order kineticssoil temperaturesoil moisture

Information

Type
Soil, Air, and Water
Information
Weed Science , Volume 32 , Issue 3 , May 1984, pp. 408 - 412
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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