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Response of purple (Cyperus rotundus) and yellow nutsedges (C. esculentus) to selective placement of sulfentrazone

Published online by Cambridge University Press:  12 June 2017

Glenn R. Wehtje ,
Robert H. Walker ,
Timothy L. Grey  and
H. Gary Hancock
Robert H. Walker
Affiliation:
Department of Agronomy and Soils, Alabama Agricultural Experiment Station, Auburn University, Auburn, AL 36849-5412
Timothy L. Grey
Affiliation:
Department of Agronomy and Soils, Alabama Agricultural Experiment Station, Auburn University, Auburn, AL 36849-5412
H. Gary Hancock
Affiliation:
FMC Corp., Hamilton, GA 31811
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Abstract

A series of greenhouse studies examined the effectiveness of PRE- and POST-applied sulfentrazone in controlling purple and yellow nutsedge as influenced by selective tissue exposure. In addition, 14C-sulfentrazone was utilized to contrast absorption and translocation resulting from these exposures. Consistent control with preemergence applications to germinating tubers was obtained with a combined root and shoot zone exposure. Yellow nutsedge was more susceptible than purple nutsedge. Performance of the separate root and shoot zone exposure was soil pH- and nutsedge-species dependent. POST-foliar applications to established nutsedge were more effective when sulfentrazone was allowed to contact the soil surface. 14C-sulfentrazone was readily absorbed by the roots and translocated to the foliage of both species in hydroponic culture.

Keywords

Sulfentrazone, N-[2,4-dichloro-5-[4-difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1 H-1,2,4-triazol-1-yl]-phenyl]methanesulfonamidepurple nutsedge, Cyperus rotundus L. CYPROyellow nutsedge Cyperus esculentus L. CYPESApplication methodselective placementherbicide absorptionherbicide translocationroot uptakeshoot uptakehydroponic cultureCYPESCYPRO
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 45 , Issue 3 , June 1997 , pp. 382 - 387
Copyright
Copyright © 1997 by the Weed Science Society of America 

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