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Weed Control and Peanut (Arachis hypogaea) Response to Nicosulfuron and Bentazon Alone and in Mixture

Published online by Cambridge University Press:  12 June 2017

John S. Richburg III ,
John W. Wilcut  and
E. Ford Eastin
John S. Richburg III
Affiliation:
Dep. Agron., Box 748, Univ. Georgia, Coastal Plain Exp. Stn., Tifton, GA 31793-0748
John W. Wilcut
Affiliation:
Dep. Agron., Box 748, Univ. Georgia, Coastal Plain Exp. Stn., Tifton, GA 31793-0748
E. Ford Eastin
Affiliation:
Dep. Agron., Box 748, Univ. Georgia, Coastal Plain Exp. Stn., Tifton, GA 31793-0748
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Abstract

Field studies in 1990 and 1991 evaluated treatment timings of nicosulfuron and bentazon alone and in mixture for weed control, peanut injury, and yield. The experimental areas were treated with a broadcast PPI application of benefin at 1.68 kg ai ha-1. Nicosulfuron was applied at 40 g ai ha-1 and bentazon at 560 g ai ha-1. Nicosulfuron mixed with bentazon applied 1 wk after crop emergence (WAE) controlled yellow nutsedge 81%. Bentazon or bentazon plus nicosulfuron applied 1 or 3 WAE controlled smallflower morningglory at least 94%. Nicosulfuron controlled sicklepod at least 76% in 1990. However, control of sicklepod was 71% from 1 WAE nicosulfuron application in 1991 and less than 26% for 3, 5, or 7 WAE application. Bentazon controlled Ipomoea spp. at least 70% but did not control Florida beggarweed and sicklepod. Nicosulfuron alone controlled Florida beggarweed and Ipomoea spp. Nicosulfuron reduced early-season peanut growth, but peanut recovered by mid-August. Bentazon reduced nicosulfuron control of Florida beggarweed when applied 1, 3, or 5 WAE, but not 7 WAE. Bentazon mixed with nicosulfuron applied 3 WAE in 1990 reduced weed-free peanut yields compared to nicosulfuron alone. Nicosulfuron and bentazon did not significantly reduce peanut yields under weed-free conditions in 1991.

Keywords

Bentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxidenicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridine-carboxamideFlorida beggarweed, Desmodium tortuosum (Sw.) DC, # DEDTOIpomoea morningglory spp., Ipomoea spp., # IPOZZsicklepod, Cassia obtusifolia L., # CASOBsmallflower morningglory, Jacquemontia tamnifolia (L.) Grisb., # IAQTAyellow nutsedge, Cyperus esculentus L. # CYPESpeanut, Arachis hypogaea L. ‘Florunner’AntagonismCASOBCYPESDEDTOIAQTAIPOZZ
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 41 , Issue 4 , December 1993 , pp. 615 - 620
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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