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Absorption, Translocation, and Metabolism of Sulfometuron in Centipedegrass (Eremochloa ophiuroides) and Bahiagrass (Paspalum notatum)

Published online by Cambridge University Press:  12 June 2017

James H. Baird ,
John W. Wilcut ,
Glenn R. Wehtje ,
Ray Dickens  and
Sam Sharpe
James H. Baird
Affiliation:
Auburn Univ., Tidewater Agric. Exp. Stn., P.O. Box 7219, 6321 Holland Road, Suffolk, VA 23437
John W. Wilcut
Affiliation:
Virginia Polytechnic Inst. and State Univ., Tidewater Agric. Exp. Stn., P.O. Box 7219, 6321 Holland Road, Suffolk, VA 23437
Glenn R. Wehtje
Affiliation:
Dep. Agron. and Soils and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849
Ray Dickens
Affiliation:
Dep. Agron. and Soils and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849
Sam Sharpe
Affiliation:
Dep. Agron. and Soils and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849
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Abstract

Sulfometuron, when applied as a foliar and/or soil application, prevented regrowth of bahiagrass. Sulfometuron application did not reduce regrowth of centipedegrass regardless of method of application. Sulfometuron was absorbed by the roots and foliage of centipedegrass and bahiagrass. Symplasmic translocation of the herbicide was evident in both species. Translocation of foliar-applied sulfometuron increased from approximately 1% at 48 h after application to 23% at 72 h in bahiagrass. Metabolism of sulfometuron was greater in centipedegrass (69% of foliar-applied, 10% of root-applied) at 72 h after application than in bahiagrass (30% of foliar-applied and 4% of root-applied). Tolerance of centipedegrass to sulfometuron appeared to be related to a high degree of herbicide metabolism in this species.

Keywords

Sulfometuron, methyl ester of 2-[[[[(4,6-dimethyl - 2 - pyrimidinyl) amino] carbonyl] amino] sulfonyl] benzoic acidcentipedegrass, Eremochloa ophiuroides (Munro) Hack. # ERLOPbahiagrass, Paspalum notatum Fluegge # PASNOSulfonylureaERLOPPASNO
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 37 , Issue 1 , January 1989 , pp. 42 - 46
Copyright
Copyright © 1989 by the Weed Science Society of America 

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