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Control of Palmer Amaranth (Amaranthus palmeri) in Peanut (Arachis hypogaea) with Postemergence Herbicides

Published online by Cambridge University Press:  12 June 2017

W. James Grichar
W. James Grichar*
Affiliation:
Texas Agricultural Experiment Station, Box 755, Yoakum, TX 77995
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Abstract

Seven postemergence (POST) herbicides were evaluated alone and in various mixtures for Palmer amaranth control in peanut from 1992 through 1994. AC 263,222 at rates as low as 0.04 kg/ha controlled ≥ 95% Palmer amaranth. Imazethapyr at rates of 0.05 to 0.07 kg/ha controlled ≥ 90% Palmer amaranth in 2 of 3 yr. Acifluorfen alone or in combination with bentazon or 2,4-DB and lactofen alone controlled > 90% Palmer amaranth in 2 of 3 yr. Bentazon or pyridate failed to provide adequate control (≤ 60%), while 2,4-DB provided good control (80%) in only 1 of 3 yr.

Keywords

AC 263,222, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-methyl-3-pyridinecarboxylic acidacifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidbentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxideimazethapyr, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidlactofen, (±)-2-ethoxy-1-methyl-2-oxoethyl 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoatepyridate, O-(6-chloro-3-phenyl-4-pyridazinyl S-octyl carbonothioate2,4-DB, 4-(2,4-dichlorophenoxy)butanoic acidPalmer amaranth, Amaranthus palmeri S. Wats. # AMAPApeanut, Arachis hypogaea L. ‘GK-7.'AC 263,222acifluorfen2,4-DBbentazonpyridatelactofengroundnutAMAPAEPOST, early postemergenceLPOST, late postemergencePOST, postemergence
Type
Research
Information
Weed Technology , Volume 11 , Issue 4 , December 1997 , pp. 739 - 743
Copyright
Copyright © 1997 by the Weed Science Society of America 

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