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Influence of Herbicides and Timing of Application on Broadleaf Weed Control in Peanut (Arachis hypogaea)

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

Field studies were conducted from 1992 through 1994 to evaluate application timing of seven postemergence (POST) broadleaf herbicides alone and in mixtures for control of eclipta and pitted morningglory. Imazethapyr and 2,4-DB did not control eclipta while AC 263,222 applied early postemergence (EPOST) at 0.07 kg/ha provided greater than 90% control in 2 of 3 yr. EPOST applications of bentazon, acifluorfen + bentazon, and pyridate controlled eclipta at least 92% all 3 yr. Lactofen applied EPOST at 0.28 kg/ha provided similar levels of eclipta control in 2 of 3 yr. Imazethapyr controlled pitted morningglory > 70% when applied EPOST. AC 263,222 controlled pitted morningglory a minimum of 83% when applied EPOST at 0.04 or 0.07 kg/ha. Pitted morningglory control was at least 85% with 2,4-DB applied alone or in a mixture with AC 263,222, acifluorfen, imazethapyr, lactofen, or pyridate. Effective weed control increased peanut yields up to 98% over the untreated check.

Keywords

acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid2,4-DB, 4-(2,4-dichlorophenoxy)butanoic acideclipta, Eclipta prostrata L. # ECLALpitted morningglory, Ipomoea lacunosa L. # IPOLApeanut, Arachis hypogaea L. ‘Florunner.'GroundnutpostemergenceEclipta prostrataIpomoea lacunosaECLALIPOLAAE, at emergenceDAP, days after plantingEPOST, early postemergenceFB, followed byLPOST, late postemergencePOST, postemergencePPI, preplant incorporatedPRE, preemergence
Type
Research
Information
Weed Technology , Volume 11 , Issue 4 , December 1997 , pp. 708 - 713
Copyright
Copyright © 1997 by the Weed Science Society of America 

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