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Economic Yield Response of Peanut (Arachis hypogaea) to Postemergence Herbicides

Published online by Cambridge University Press:  12 June 2017

John W. Wilcut
John W. Wilcut*
Affiliation:
Tidewater Agric. Exp. Stn., Va. Polytech. Inst. & State Univ., P.O. Box 7219, 6321 Holland Road, Suffolk, VA 23437
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Abstract

Field experiments were conducted in 1988 and 1989 to evaluate timing of POST herbicide application in peanut for annual broadleaf weed control, peanut yield, and net returns. Bentazon tank-mixtures with either acifluorfen or paraquat controlled common lambsquarters, prickly sida, and morningglory species equally when applied either at ground-cracking (GC) or 2 wk after ground-cracking (2WGC). Paraquat controlled common lambsquarters least (32 to 33%). Bentazon plus acifluorfen plus BCH 81508S controlled 82% common lambsquarters at 2WGC compared with 66% control from bentazon plus acifluorfen plus a crop oil concentrate. Lactofen controlled 86% common lambsquarters when applied at GC compared to 34% at 2WGC. All applications applied at 4 wk after GC (4WGC) controlled essentially no annual broadleaf weeds. Higher yields and net returns were generally obtained with earlier herbicide applications. Bentazon tank-mixtures with acifluorfen provided equivalent peanut yields and net returns for GC and 2WGC applications.

Keywords

Acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidBCH 81508S, an adjuvantbentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxidelactofen, (±)-2-ethoxy-1-methyl-2-oxoethyl 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoateparaquat, 1,1′-dimethyl-4,4′-bipyridinium ioncommon lambsquarters, Chenopodium album L. ♯ CHEALprickly sida, Sida spinosa L. ♯ SIDSPivyleaf morningglory, Ipomoea hederacea (L.) Jacq. ♯ IPOHEentireleaf morningglory, Ipomoea hederacea var. integriuscula Gray ♯ IPOHGtall morningglory, Ipomoea purpurea (L.) Roth. ♯ PHBPUpitted morningglory, Ipomoea lacunosa L. ♯ IPOLApeanut, Arachis hypogaea L., ‘Florigiant’Economic analysisnet returnsCHEALIPOLAIPOHEIPOHGPHBPUSIDSP
Type
Research
Information
Weed Technology , Volume 5 , Issue 2 , June 1991 , pp. 416 - 420
Copyright
Copyright © 1991 Weed Science Society of America 

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References

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