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1 January 2003 Absorption, translocation, and metabolism of foliar-applied CGA-362622 in purple and yellow nutsedge (Cyperus rotundus and C. esculentus)
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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.

Nomenclature: CGA-362622, N-([4,6-dimethoxy-2-pyrimidinyl]carbamoyl)-3-(2,2,2,-trifluoroethoxy)-pyridin-2-sulfonamide sodium salt; purple nutsedge, Cyperus rotundus L. CYPRO; yellow nutsedge, Cyperus esculentus L. CYPES.

Shawn C. Troxler, Ian C. Burke, John W. Wilcut, W. David Smith, and Jim Burton "Absorption, translocation, and metabolism of foliar-applied CGA-362622 in purple and yellow nutsedge (Cyperus rotundus and C. esculentus)," Weed Science 51(1), 13-18, (1 January 2003). https://doi.org/10.1614/0043-1745(2003)051[0013:ATAMOF]2.0.CO;2
Received: 31 January 2002; Accepted: 21 June 2002; Published: 1 January 2003
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