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Response of Japanese Stiltgrass (Microstegium vimineum) to Application Timing, Rate, and Frequency of Postemergence Herbicides

Published online by Cambridge University Press:  20 January 2017

Caren A. Judge ,
Joseph C. Neal  and
Jeffrey F. Derr
Caren A. Judge*
Affiliation:
Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609
Joseph C. Neal
Affiliation:
Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609
Jeffrey F. Derr
Affiliation:
Virginia Polytechnic Institute and State University, Hampton Roads Agricultural Research and Extension Center, 1444 Diamond Springs Road, Virginia Beach, VA 23455-3315
*
Corresponding author's E-mail: carrie_judge@ncsu.edu
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Abstract

Japanese stiltgrass is a nonnative invasive grass that occurs in a variety of habitats and is widely distributed throughout the eastern United States. In natural areas such as forests, herbicide options that selectively control Japanese stiltgrass while preserving native herbaceous and woody vegetation may be desired. The efficacy of three selective postemergence herbicides (fenoxaprop-P, imazapic, and sethoxydim) applied early season, midseason, or late season on monoculture understory stands of Japanese stiltgrass in forests was examined in an experiment conducted at a site in North Carolina and a site in Virginia from 2002 to 2004. The herbicides, averaged across application timings, controlled Japanese stiltgrass at the end of the growing season 83 to 89% and seedhead production 79 to 94% compared with nontreated plants. Seedling emergence was reduced in the spring of 2004 by 89, 70, and 78% by fenoxaprop-P, imazapic, and sethoxydim, respectively, applied in 2003. In another experiment at the North Carolina site in 2002 and 2003, fenoxaprop-P or sethoxydim applied twice (4 wk apart) at half-registered rates controlled Japanese stiltgrass. This study demonstrates that land managers have multiple POST herbicide and application timing, rate, and frequency options for Japanese stiltgrass control.

Keywords

Fenoxaprop-PimazapicsethoxydimJapanese stiltgrass, Microstegium vimineum (Trin.) A. Camus # MCGVMInvasive plantannual jewgrassbamboograssflexible sesagrassJapanese grassMary's grassNepalese browntop1Xmaximum use rate
Type
Research Article
Information
Weed Technology , Volume 19 , Issue 4 , December 2005 , pp. 912 - 917
Copyright
Copyright © Weed Science Society of America 

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