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Texas Panicum (Panicum texanum) Control in Irrigated Field Corn (Zea mays) with Foramsulfuron, Glyphosate, Nicosulfuron, and Pendimethalin

Published online by Cambridge University Press:  20 January 2017

Eric P. Prostko ,
Timothy L. Grey  and
Jerry W. Davis
Eric P. Prostko*
Affiliation:
Department of Crop and Soil Sciences, The University of Georgia, 104 Research Way, Tifton, GA 31793
Timothy L. Grey
Affiliation:
Department of Crop and Soil Sciences, The University of Georgia, 104 Research Way, Tifton, GA 31793
Jerry W. Davis
Affiliation:
The University of Georgia, Experimental Statistics, 1109 Experiment Street, Griffin, GA 30223
*
Corresponding author's E-mail: eprostko@uga.edu.
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Abstract

Texas panicum is considered to be the most troublesome weed of field corn in the Southeast. Field trials were conducted in Georgia in 2003 and 2004 to compare pendimethalin, nicosulfuron, foramsulfuron, and glyphosate for Texas panicum control in irrigated field corn and to determine which herbicide provided the greatest economic returns. Pendimethalin applied early POST (EPOST), 10 to 12 d after planting (DAP), controlled Texas panicum less than 35% late in the season and resulted in reduced corn yield and net returns in 2004. Glyphosate applied sequentially POST at 21 to 24 DAP and again late POST (LPOST) at 35 to 38 DAP controlled Texas panicum 82 to 94% late in the season compared with 43 to 80% control by nicosulfuron and foramsulfuron applied POST. Texas panicum control, corn yield, and net returns were similar with glyphosate applied POST and LPOST at 0.53 or 1.1 kg ai/ha. Glyphosate applied POST and LPOST was more effective than glyphosate POST, but net returns were greater only in 2004.

Keywords

Atrazineforamsulfuronnicosulfuronpendimethalinpotassium salt of glyphosateTexas panicum, Panicum texanum L. #3 PANTEcorn, Zea mays L. ‘DeKalb 67-60RR’Economicsherbicide-resistant cropspostemergenceAMS, ammonium sulfateCOC, crop oil concentrateGR, glyphosate resistantMSO, methylated seed oil
Type
Research
Information
Weed Technology , Volume 20 , Issue 4 , December 2006 , pp. 961 - 964
Copyright
Copyright © Weed Science Society of America 

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