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Movement and Distribution of Pyrazon in Soil

Published online by Cambridge University Press:  12 June 2017

D. T. Smith
Affiliation:
Department of Crop Science, Michigan State University
W. F. Meggitt
Affiliation:
Department of Crop Science, Michigan State University

Abstract

Two months after 5-amino-4-chloro-2-phenyl-3(2H)-pyridazinone (pyrazon) application (2.7 kg/ha), 80 to 100% of the total residue (1.3 to 4.2 μg/g) was in the upper 5 cm of soil. Herbicide movement occurred in soils that contained 3.8% organic matter or less. Pyrazon did not move below 10 cm or accumulate in soil as a result of movement. Adsorption of pyrazon was related to soil organic matter content (r = 0.90) and accounted for differences in herbicide movement previously observed. Calculations of pyrazon movement, based on soil organic matter content, coincided with depths of movement observed under field conditions.

Type
Research Article
Copyright
Copyright © 1970 Weed Science Society of America 

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References

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