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Effect of Continuous Imidazolinone Herbicide Use on Yellow Nutsedge (Cyperus esculentus) Populations in Peanut

Published online by Cambridge University Press:  20 January 2017

W. James Grichar
W. James Grichar*
Affiliation:
Texas Agricultural Experiment Station, Yoakum, TX 77995. E-mail: [email protected]
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Abstract

Field experiments were conducted from 1994 through 1996 to evaluate the effects of imazapic applied postemergence (POST) at 0.05 and 0.07 kg ai/ha, imazethapyr applied preplant incorporated (PPI) or POST at 0.07 kg ai/ha, and metolachlor applied PPI at 1.7 kg ai/ha on yellow nutsedge control, nutsedge tuber density, and peanut yield. All herbicides controlled yellow nutsedge at least 75% after 3 yr. Imazapic at 0.05 and 0.07 kg/ha controlled yellow nutsedge more consistently than did imazethapyr or metolachlor. Imazethapyr applied POST controlled yellow nutsedge more effectively than did imazethapyr applied PPI. Yellow nutsedge tuber densities in herbicide-treated plots were 51 to 75% less than in untreated control plots. Plots treated with imazapic, imazethapyr applied POST, and metolachlor resulted in higher peanut yields than did untreated control plots.

Keywords

Imazapicimazethapyrmetolachloryellow nutsedge, Cyperus esculentus L. #3 CYPESpeanut, Arachis hypogaea L. ‘GK-7’ALS inhibitorsefficacytuber densityEPOST, early postemergencePOST, postemergencePPI, preplant incorporatedPRE, preemergence
Type
Commentary
Information
Weed Technology , Volume 16 , Issue 4 , December 2002 , pp. 880 - 884
Copyright
Copyright © Weed Science Society of America 

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