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Control of Purple Nutsedge (Cyperus rotundus) with Herbicides and Mowing

Published online by Cambridge University Press:  20 January 2017

Barry J. Brecke ,
Daniel O. Stephenson IV  and
J. Bryan Unruh
Barry J. Brecke
Affiliation:
West Florida Research and Education Center, Institute of Food and Agricultural Science, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
Daniel O. Stephenson IV*
Affiliation:
West Florida Research and Education Center, Institute of Food and Agricultural Science, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
J. Bryan Unruh
Affiliation:
West Florida Research and Education Center, Institute of Food and Agricultural Science, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
*
Corresponding author's E-mail: [email protected]
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Abstract

Purple nutsedge management with herbicides (halosulfuron, imazaquin, MSMA, S-metolachlor, and sulfentrazone) and mowing was investigated in a bare ground homogenous purple nutsedge field site. Mowing at 5 cm increased control of purple nutsedge by 6% compared to not mowing. Sequential applications of halosulfuron, MSMA, and sulfentrazone provided at least 80% control of purple nutsedge shoots, whereas imazaquin controlled purple nutsedge shoots less than 65%. All herbicide treatments reduced purple nutsedge total and viable tuber densities at least 40%. S-metolachlor PRE reduced total and viable tuber densities 65 and 69%, respectively. Sequential applications of sulfentrazone or MSMA reduced total and viable tubers 80%. Early postemergence (EPOST) or EPOST followed by late-postemergence applications of halosulfuron and imazaquin reduced total and viable tuber densities 52 and 59%, respectively. Data indicate that S-metolachlor PRE and sequential applications of MSMA and sulfentrazone may be viable treatments for control of purple nutsedge shoots and tubers.

Keywords

HalosulfuronimazaquinMSMAS-metolachlorsulfentrazonepurple nutsedge, Cyperus rotundus L. # CYPROPurple nutsedge controlpurple nutsedge tuber viabilityEPOST, early postemergenceLPOST, late-postemergenceWALP, weeks after late-postemergenceWAT, weeks after treatment
Type
Research Article
Information
Weed Technology , Volume 19 , Issue 4 , December 2005 , pp. 809 - 814
Copyright
Copyright © Weed Science Society of America 

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Footnotes

1 This research was supported by the Florida Agricultural Experiment Station and approved for publication as Journal Series R-10511.
Current address: Cropping Systems Agronomist, Northeast Arkansas Research and Extension Center, University of Arkansas, P. O. Box 48, Keiser, AR 72351.

References

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