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The Movement and Persistence of Picloram in Soil

Published online by Cambridge University Press:  12 June 2017

Donald E. Herr ,
E. W. Stroube  and
Dale A. Ray
Donald E. Herr
Affiliation:
Department of Agronomy, The Ohio State University, Columbus, Ohio
E. W. Stroube
Affiliation:
Department of Agronomy, The Ohio State University, Columbus, Ohio
Dale A. Ray
Affiliation:
Ohio Agricultural Research and Development Center, Wooster, Ohio
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Abstract

Surface applications of 4-amino-3,5,6-trichloropicolinic acid (picloram) were made at 5 rates on 3 soil types. The picloram-treated areas were sampled 3 times after herbicidal application to determine the extent and movement of herbicide residues. The region of highest picloram concentration in a heavy- and medium-textured soil, when sampled 9 and 15 months after application, was near the surface. On the light-textured soil, picloram moved more completely through the surface 2 ft of soil with greatest herbicide concentrations generally found at the deepest sampling depth. Applications of picloram were dissipated faster at low rather than at high rates on all 3 soil types. Concentrations of phytotoxic residues at the end of the study period were greatest in the heavy-textured soil with the highest organic content.

Type
Research Article
Information
Weeds , Volume 14 , Issue 3 , July 1966 , pp. 248 - 250
Copyright
Copyright © 1966 Weed Science Society of America 

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References

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