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Postemergence AC 263,222 Systems for Weed Control in Peanut (Arachis hypogaea)

Published online by Cambridge University Press:  12 June 2017

John W. Wilcut ,
John S. Richburg III ,
Gerald L. Wiley  and
F. Robert Walls Jr.
John W. Wilcut
Affiliation:
Dep. of Crop and Soil Sci., Univ. Georgia, Coastal Plain Exp. Sta., Tifton, GA 31793-0748
John S. Richburg III
Affiliation:
Dep. of Crop and Soil Sci., Univ. Georgia, Coastal Plain Exp. Sta., Tifton, GA 31793-0748
Gerald L. Wiley
Affiliation:
American Cyanamid Co., Tifton, GA 31794
F. Robert Walls Jr.
Affiliation:
American Cyanamid Co., Goldsboro, NC 27530
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Abstract

Field studies in 1990 and 1991 at six locations in Georgia and one location in North Carolina evaluated AC 263,222 for weed control, peanut tolerance, and yield. AC 263,222 applied early postemergence at 71 g ai ha−1 controlled bristly starbur, coffee senna, common lambsquarters, Ipomoea species, prickly sida, sicklepod, smallflower morningglory, and yellow nutsedge at least 91%. AC 263,222 controlled common cocklebur 77% and Florida beggarweed from 47 to 100%. Crop injury was 4% for AC 263,222 applied once and 12% or less from two applications. Mixtures of bentazon with AC 263,222 did not improve control compared to AC 263,222 alone. Imazethapyr did not improve control of AC 263,222 systems. In several locations, bentazon reduced control of Florida beggarweed with AC 263,222 when applied in a mixture compared to AC 263,222 alone. Weed control from the standard of paraquat plus bentazon applied early postemergence followed by paraquat, bentazon plus 2,4-DB applied POST did not provide the level or spectrum of weed control as AC 263,222 systems.

Keywords

AC 263,222, (+)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl}-5-methyl-3-pyridinecarboxylic 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 acid2,4-DB, 4-(2,4-dichlorophenoxy)-butanoic acidparaquat, 1,1′-dimethy-4,4′-bipyridinium ionbristly starbur, Acanthospermum hispidum DC. ♯ ACNHIcommon cocklebur,Xanthium strumurium L. ♯ XANSTcommon lambsquarters, Chenopodium album♯ CHEALFlorida beggarweed, Desmodium tortuosum(SW.) DC. ♯ DEDTO, coffee senna, Cassia occidentalis L. ♯ CASOCprickly sida, Sida spinosa L. ♯ SIDSPsicklepod, Senna obtusifolia (L.) Irwin and Barneby ♯ CASOBsmallflower morningglory, Jacquemontia tamnifolia(L.) Griseb ♯ IAQTAyellow nutsedge, Cyperus esculentus L. ♯ CYPESpeanut, Arachis hypogaea L.ACNHICASOBCASOCCHEALCYPESDEDTOIAQTASIDSPXANST
Type
Weed Management
Information
Weed Science , Volume 44 , Issue 3 , September 1996 , pp. 615 - 621
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

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