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Weed Control and Tobacco (Nicotiana tabacum) Tolerance with Fomesafen

Published online by Cambridge University Press:  12 June 2017

David C. Bridges  and
Michael G. Stephenson
David C. Bridges
Affiliation:
Dep. Agron., Univ. Ga., Griffin, GA 30223-1797
Michael G. Stephenson
Affiliation:
USDA-ARS, Nematodes, Weeds and Crops Unit, Tifton, GA 31793
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Abstract

Research was conducted to determine the tolerance of flue-cured tobacco to fomesafen and the potential for weed control in tobacco with fomesafen. Treatments consisted of fomesafen at 0.4 or 0.6 kg ai ha–1 applied pretransplant incorporated (PTI), pretransplant (PRE-T), post-transplant (POS-T), postemergence-over-top (POT), or post-directed (PD). Tobacco injury within 30 d of application was as high as 30%, but tobacco recovered and few significant differences in tobacco yield, grade index, or price were observed except where fomesafen was applied PTI at 0.6 kg ha–1. Tobacco tolerance relative to time of application was generally PRE-T = POT > POS-T = PTI. Florida pusley and large crabgrass control was > 80% for all fomesafen treatments. Yellow and purple nutsedge control was approximately 30% before cultivation.

Keywords

Fomesafen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-N-(methylsulfonyl)-2-nitrobenzamideFlorida pusley (Richardia scabra L. ♯ RCHSC)large crabgrass [Digitaria sanquinalis (L.) Scop. ♯ DIGSA]purple nutsedge (Cyperus rotundus L. ♯ CYPRO)yellow nutsedge, (Cyperus esculentus L. ♯ CYPES)tobacco, (Nicotiana tabacum L. ‘McNair 944’)
Type
Research
Information
Weed Technology , Volume 5 , Issue 4 , December 1991 , pp. 868 - 872
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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