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Influence of Application Method and Chemical Form on the Absorption and Translocation of Aminocyclopyrachlor in Black Walnut

Published online by Cambridge University Press:  20 January 2017

Nevin C. Lawrence ,
Jared L. Bell  and
Ian C. Burke
Nevin C. Lawrence*
Affiliation:
Department of Crop and Soil Sciences, Johnson Hall rm. 113, Washington State University, Pullman, WA 99163-6420
Jared L. Bell
Affiliation:
Dow AgroSciences LLC, 9330 Zionsville Rd., Indianapolis, IN 46268
Ian C. Burke
Affiliation:
Department of Crop and Soil Sciences, Johnson Hall rm. 113, Washington State University, Pullman, WA 99163-6420
*
Corresponding author's E-mail: nevin.lawrence@wsu.edu.
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Abstract

Absorption and translocation of aminocyclopyrachlor (AMCP) was investigated in black walnut. Radiolabeled AMCP was applied foliarly as a free acid, and basally as a free-acid-formulated oil-soluble liquid and as a methyl ester emusifiable concentrate. Maximum absorption was 68% for the methyl ester, 47% for the free-acid oil-soluble liquid, and 8% for the free acid when evaluated as percent applied. When recovered AMCP was presented as Bq g−1, no difference was observed in AMCP absorption or translocation of 14C-labeled material out of treated plant parts. Recovery of applied radiolabeled material in the roots from basal applications was 5 to 11% 72 h after treatment (HAT), compared with 0.8% recovery from a foliar application. Regardless of chemical form or formulation type, comparable injury was observed within 72 HAT despite low levels of translocation.

Keywords

Aminocyclopyrachlorblack walnut, Juglans nigra L.Auxinic herbicidesgrowth regulatorpyrimidine carboxylic acid
Type
Physiology/Chemistry/Biochemistry
Information
Weed Science , Volume 64 , Issue 1 , March 2016 , pp. 25 - 32
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Associate Editor for this paper: Franck E. Dayan, USDA-ARS.

References

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