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1 January 2016 Influence of Application Method and Chemical Form on the Absorption and Translocation of Aminocyclopyrachlor in Black Walnut
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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.

Nomenclature: Aminocyclopyrachlor; black walnut, Juglans nigra L.

© 2016 Weed Science Society of America
Nevin C. Lawrence, Jared L. Bell, and Ian C. Burke "Influence of Application Method and Chemical Form on the Absorption and Translocation of Aminocyclopyrachlor in Black Walnut," Weed Science 64(1), 25-32, (1 January 2016). https://doi.org/10.1614/WS-D-15-00044.1
Received: 18 March 2015; Accepted: 1 September 2015; Published: 1 January 2016
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