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Preemergence Weed Control in Direct-Seeded Watermelon

Published online by Cambridge University Press:  20 January 2017

Lynn P. Brandenberger*
Affiliation:
Department of Horticulture and Landscape Architecture, Oklahoma State, 360 Ag Hall, Stillwater, OK 74078-6027
James W. Shrefler
Affiliation:
Wes Watkins Agriculture Research and Extension Center, P.O. Box 128, Lane, OK 74555-0128
Charles L. Webber III
Affiliation:
U.S. Department of Agriculture, Agriculture Research Service, South Central Agricultural Research Laboratory, P.O. Box 159, Lane, OK 74555
Ronald E. Talbert
Affiliation:
Department of Crop, Soil, and Environmental Sciences, University of Arkansas, 1366 West Altheimer Drive, Fayetteville, AR 72704
Mark E. Payton
Affiliation:
Oklahoma State University, 301 Math Sci., Stillwater, OK 74078
Lynda K. Wells
Affiliation:
Department of Horticulture and Landscape Architecture, Oklahoma State, 360 Ag Hall, Stillwater, OK 74078-6027
Marilyn McClelland
Affiliation:
Department of Crop, Soil, and Environmental Sciences, University of Arkansas, 1366 West Altheimer Drive, Fayetteville, AR 72704
*
Corresponding author's E-mail: lynn.brandenberger@okstate.edu

Abstract

Studies were conducted at eight sites during a 3-yr period in Oklahoma and Arkansas to determine the effectiveness and safety of preemergence applications of halosulfuron both alone and in tank mixtures with bensulide, clomazone, ethalfluralin, and naptalam. Ethalfluralin, naptalam plus bensulide, and sulfentrazone also were applied alone. Although halosulfuron caused up to 20% seedling stunting, watermelon plants recovered by 5 to 7 wk after planting, and yield was similar to that of hand-weeded plots. Halosulfuron treatments controlled hophornbeam copperleaf, Palmer amaranth, carpetweed, and cutleaf groundcherry 80 to 100%. Control of goosegrass was at least 97% with clomazone plus ethalfluralin plus halosulfuron. Injury to watermelon treated with sulfentrazone ranged from 76 to 98% at 2 to 4 wk after treatment. This was reflected by yields that were lower than any other herbicide treatment in the studies.

Information

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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