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Dissipation of Dicamba

Published online by Cambridge University Press:  12 June 2017

O. C. Burnside  and
T. L. Lavy
O. C. Burnside
Affiliation:
Department of Agronomy, University of Nebraska, Lincoln
T. L. Lavy
Affiliation:
Department of Agronomy, University of Nebraska, Lincoln
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Abstract

Detoxication of 3,6-dichloro-o-anisic acid (dicamba) in incubated soils was greater in heavier soil types and soils with higher moisture contents and higher temperatures. Dicamba phytotoxicity was less at 21 C than at 27 or 32 C. Over a pH range of 4.1 to 9.4, dicamba had a net negative charge. Dicamba showed considerable adsorption onto a kaolinite clay but little adsorption onto other clays and soils studied. Dicamba-1-C14 mixed with autoclaved Sharpsburg silty clay loam soil and incubated at 0, 33, 75, and 100% relative humidity and 35 C sustained very little volatilization loss over an 8-week period. However, nearly one-half of the radioactivity of dicamba-1-C14 on bare planchets at 0 and 100% relative humidity and 35 C was lost during an 11-week incubation period.

Type
Research Article
Information
Weeds , Volume 14 , Issue 3 , July 1966 , pp. 211 - 214
Copyright
Copyright © 1966 Weed Science Society of America 

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References

Literature Cited

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