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Absorption, translocation, and metabolism of foliar-applied CGA-362622 in purple and yellow nutsedge (Cyperus rotundus and C. esculentus)

Published online by Cambridge University Press:  20 January 2017

Shawn C. Troxler ,
Ian C. Burke ,
John W. Wilcut ,
W. David Smith  and
Jim Burton
Shawn C. Troxler
Affiliation:
Crop Science Department, North Carolina State University, Raleigh, NC 27695-7620
Ian C. Burke
Affiliation:
Crop Science Department, North Carolina State University, Raleigh, NC 27695-7620
W. David Smith
Affiliation:
Crop Science Department, North Carolina State University, Raleigh, NC 27695-7620
Jim Burton
Affiliation:
Horticultural Science Department, North Carolina State University, Raleigh, NC 27695-7609
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Abstract

Studies were conducted to evaluate the absorption, translocation, and metabolism of 14C–CGA-362622 when foliar-applied to purple and yellow nutsedge. Less than 53% of the herbicide was absorbed after 96 h. Both nutsedge species translocated appreciable amounts of herbicide (30%) out of treated leaves. Translocation was both acropetal and basipetal, with at least 25% transported basipetally. Neither nutsedge species translocated more than 4% of applied radioactivity to the tubers and roots. Most of the metabolites formed by the nutsedge species were more polar than 14C–CGA-362622 and averaged 69 and 61% of the radioactivity in purple and yellow nutsedge, respectively. The half-life of CGA-362622 was estimated at 4 h in both purple and yellow nutsedge.

Keywords

CGA-362622, N-([4,6-dimethoxy-2-pyrimidinyl]carbamoyl)-3-(2,2,2,-trifluoroethoxy)-pyridin-2-sulfonamide sodium saltpurple nutsedge, Cyperus rotundus L. CYPROyellow nutsedge, Cyperus esculentus L. CYPESAcropetal translocationbasipetal translocationhalf-life
Type
Research Article
Information
Weed Science , Volume 51 , Issue 1 , February 2003 , pp. 13 - 18
Copyright
Copyright © Weed Science Society of America 

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