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Influence of Sulfentrazone Rate and Application Method on Peanut Weed Control

Published online by Cambridge University Press:  20 January 2017

Timothy L. Grey*
Affiliation:
Department of Crop and Soil Sciences, The University of Georgia, Coastal Plain Experiment Station, 115 Coastal Way, P.O. Box 748, Tifton, GA 31794
David C. Bridges
Affiliation:
Department of Crop and Soil Sciences, The University of Georgia, Coastal Plain Experiment Station, 115 Coastal Way, P.O. Box 748, Tifton, GA 31794
H. Gary Hancock
Affiliation:
Southern Region and IR4 coordinator North America for FMC Corp., 832 Barnes Mill Road, Hamilton, GA 31811
Jerry W. Davis
Affiliation:
Experimental Statistics, University of Georgia, Georgia Experiment Station, 1109 Experiment Street, Griffin, GA 30223
*
Corresponding author's E-mail: tgrey@tifton.uga.edu

Abstract

Field studies were conducted in 2000 and 2001 in Plains, GA, to determine peanut and weed response to the residual herbicides sulfentrazone, imazapic, diclosulam, and flumioxazin. Herbicide treatments included sulfentrazone applied preemergence (PRE) or preplant incorporated (PPI) at 112, 168, 224, and 280 g ai/ha, imazapic postemergence (POST) at 71 g ai/ha, diclosulam PPI at 26 g ai/ha, and flumioxazin PRE at 88 g ai/ha. Peanut exhibited early-season injury from all herbicide treatments, ranging from 0 to 10% for sulfentrazone PPI or PRE, 10% for imazapic, 3 to 23% for flumioxazin, and 1 to 7% for diclosulam. Yields were similar for sulfentrazone PPI- or PRE-treated and flumioxazin-, imazapic-, and diclosulam-treated peanut. Yellow nutsedge control was 83% or greater with all rates of sulfentrazone PRE or PPI, 83 and 90% with diclosulam, and 96 and 99% with imazapic, respectively. Flumioxazin did not control yellow nutsedge or wild poinsettia. Tall morningglory control was 82% or greater with imazapic, diclosulam, flumioxazin, and sulfentrazone PPI or PRE at 168 g/ha or higher. Florida beggarweed control was 88% or greater with diclosulam, flumioxazin, and sulfentrazone PRE at 224 and 280 g/ha. Overall, peanut tolerance to sulfentrazone at 112 to 280 g/ha PPI and PRE was high and yield was equivalent to the currently registered peanut residual herbicides.

Information

Type
Research
Copyright
Copyright © Weed Science Society of America 

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