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Postemergence Weed Control Systems Without Dinoseb for Peanuts (Arachis hypogaea)

Published online by Cambridge University Press:  12 June 2017

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

Postemergence treatments utilizing various combinations of fluazifop-P, paraquat, and 2,4-DB were compared to a preplant-incorporated (PPI) application of benefin followed by a ground-cracking application of alachlor and dinoseb plus naptalam and a postemergence application of 2,4-DB for weed control, peanut yield, and net economic return to land, overhead, and management. The greatest peanut yields (3-yr average of 4510 kg/ha) and net returns (3-yr average of $521/ha) were provided by a postemergence system that utilized one ground-cracking and one postemergence application of paraquat and one postemergence application of fluazifop-P and 2,4-DB. Seven postemergence systems provided equivalent or greater yield and net returns than the PPI and dinoseb plus naptalam system. Fresh weight reductions of Texas panicum, sicklepod, Florida beggarweed, and pitted morningglory from postemergence weed control systems were equivalent to reductions obtained from the PPI and dinoseb plus naptalam system. The addition of paraquat and 2,4-DB to the PPI and dinoseb plus naptalam system improved the 3-yr average peanut yield and net economic return by 510 kg/ha and $136/ha, respectively, compared to the same system without paraquat and 2,4-DB.

Keywords

Fluazifop-P, (R)-2-[4-[[5-trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanic acidparaquat, 1,1′-dimethyl-4,4′-bipyridinium ionbenefin, N-butyl-N-ethyl-2,6-dinitro-4-(trifluoromethyl)benzenaminealachlor, 2-chloro-N-(2,6-diethylphenyl-N-(methoxymethyl)acetamidedinoseb, 2-(1-methylpropyl)-4,6-dinitrophenolnaptalam, 2-[(1-naphthalenylamino)carbonyl]benzoic acid2,4-DB, 4-(2,4-dichlorophenoxy)butanoic acidTexas panicum, (Panicum texanum Buckl. ♯3 PANTE)sicklepod, (Cassia obtusifolia L. ♯ CASOB)Florida beggarweed, (Desmodium tortuosum (Sw.) DC ♯ DEDTO)pitted morningglory, (Ipomoea lacunosa L. ♯IPOLA)Economic analysisnet returnsPanicum texanumCassia obtusifoliaDesmodium tortuosumIpomoea lacunosaCASOBDEDTOIPOLAPANTE

Information

Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 37 , Issue 3 , May 1989 , pp. 385 - 391
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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