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AC 263,222 absorption and fate in leafy spurge (Euphorbia esula)

Published online by Cambridge University Press:  12 June 2017

W. Mack Thompson ,
Scott J. Nissen  and
Robert A. Masters
W. Mack Thompson
Affiliation:
Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO 80523
Robert A. Masters
Affiliation:
U.S. Department of Agriculture, Agriculture Research Service, Department of Agronomy, University of Nebraska, Lincoln, NE 68583-0915
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Abstract

Absorption, translocation, and metabolism of AC 263,222 by leafy spurge were studied over 8 d. Based on the amount of herbicide applied and recovered from the leaf surfaces, 40% of applied AC 263,222 was absorbed by leafy spurge 2 d after treatment (DAT), with no further absorption observed by 8 DAT. Eight DAT, 19% of applied [14C]-AC 263,222 had translocated to below-ground plant parts while 4% was exuded from the roots into the sand media. AC 263,222 was not metabolized 2 DAT in the crown, root, and root buds, but 42% was metabolized in the treated leaves. Only 17% of recovered [14C] was AC 263,222 in treated leaves 8 DAT (83% metabolized), while AC 263,222 accounted for 70% of recovered [14C] in the root and root buds. HPLC analysis indicated that the balance of [14C] was associated with a single, polar metabolite. Total recovery of [14C] was 88% at 8 DAT.

Keywords

AC 263,222ammonium nitrate, NH4NO3leafy spurge, Euphorbia esula L. EPHESTranslocationmetabolismroot exudationrangeland weedimidazolinoneperennial weedadventitious shoot budsEPHES
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 46 , Issue 5 , October 1998 , pp. 510 - 513
Copyright
Copyright © 1998 by the Weed Science Society of America 

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