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Translocation and Metabolism of Dicamba in Western Bracken

Published online by Cambridge University Press:  12 June 2017

W. C. Robocker  and
B. A. Zamora
W. C. Robocker
Affiliation:
U.S. Dep. of Agric., Washington State Univ., Pullman, WA 99163
B. A. Zamora
Affiliation:
(formerly Range Sci., U.S. Dep. of Agric), Washington State Univ., Pullman, WA 99163
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Abstract

Translocation, distribution, and metabolism of 14C-carboxy-labeled dicamba (3,6-dichloro-o-anisic acid) in western bracken [Pteridium aquilinum (L.) Kuhn var. pubescens Underw.] were determined in field and greenhouse trials by liquid scintillation radioassays, autoradiographs, and paper chromatography. Absorption and translocation of 14C readily occurred from 14C-labeled dicamba applied to frond buds, pinnae of new leaves, and rhizome tissue. The translocated 14C tended to accumulate in opened fronds or if fronds had not emerged, in frond buds and rhizome apices. Dicamba applied to living tissue of a quasi-dormant rhizome in the field in spring was translocated to rhizome apices and metabolized to 5-hydroxy-3,6-dichloro-o-anisic acid and 3,6-dichlorogentisic acid 10 days after application.

Type
Research Article
Information
Weed Science , Volume 24 , Issue 4 , July 1976 , pp. 435 - 438
Copyright
Copyright © 1976 by the Weed Science Society of America 

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References

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