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Postemergence Weed Management Systems for Peanuts (Arachis hypogaea)

Published online by Cambridge University Press:  12 June 2017

John W. Wilcut ,
Glenn R. Wehtje ,
T. Vint Hicks  and
Tracy A. Cole
John W. Wilcut
Affiliation:
Dep. Agron. Soils & Ala. Agric. Exp. Stn., Auburn Univ., AL 36849
Glenn R. Wehtje
Affiliation:
Dep. Agron. Soils & Ala. Agric. Exp. Stn., Auburn Univ., AL 36849
T. Vint Hicks
Affiliation:
Dep. Agron. Soils & Ala. Agric. Exp. Stn., Auburn Univ., AL 36849
Tracy A. Cole
Affiliation:
Dep. Agron. Soils & Ala. Agric. Exp. Stn., Auburn Univ., AL 36849
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Abstract

Field studies were conducted from 1985 to 1987 to evaluate postemergence herbicide systems with preemergence systems to control Texas panicum, Florida beggarweed, sicklepod, and pitted morningglory in peanuts. Adding paraquat at 0.14 kg ai/ha to postemergence herbicide systems reduced fresh weight of Florida beggarweed 92% (18% increase over the same systems without paraquat), sicklepod 95% (21% increase), and pitted morningglory 95% (11% increase). Herbicide systems containing paraquat improved peanut yields by 230 kg/ha and net returns by $52/ha over herbicide systems not containing paraquat. Fluazifop-P and sethoxydim systems reduced Texas panicum fresh weight (at least 96%) more than a preemergence system (92% reduction) that used benefin applied preplant incorporated and alachlor plus naptalam and dinoseb applied at cracking (GC) or a postemergence system that used alachlor and naptalam plus dinoseb GC and paraquat applied early postemergence (86% reduction). Systems containing fluazifop-P provided greater yields (4190 kg/ha) and net returns ($383/ha) than systems containing sethoxydim (4010 kg/ha, $305/ha) when averaged across all rates of application.

Keywords

Alachlor, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamidebenefin, N-butyl-N-ethyl-2,6-dinitro-4-trifluoromethyl)benzenaminedinoseb, 2-(1-methylpropyl)-4,6-dinitrophenolfluazifop-P, (R)-2-[4-[[5-trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acidnaptalam, 2-[(1-naphthalenylamino)carbonyl]benzoic acidparaquat, 1,1′-dimethyl-4,4′-bipyridinium ionsethoxydim, 2-[1-(ethyoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one2,4-DB, 4-(2,4-dichlorophenoxy) butanoic acidTexas panicum, Panicum texanum Buckl. ♯3 PANTEsicklepod, Cassia obtusifolia L. ♯ CASOBFlorida beggarweed, Desmodium tortuosum (Sw.) DC. ♯ DEDTOpitted morningglory, Ipomoea lacunosa L. ♯ IPOLApeanut, Arachis hypogaea L.Economic analysisnet returnsPanicum texanumCassia obtusifoliaDesmodium tortuosumIpomoea lacunosaCASOBDEDTOIPOLAPANTE
Type
Research
Information
Weed Technology , Volume 4 , Issue 2 , June 1990 , pp. 239 - 244
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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