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Nutsedge (Cyperus spp.) Control in Peanuts (Arachis hypogaea) with Imazethapyr

Published online by Cambridge University Press:  12 June 2017

W. James Grichar ,
Paul R. Nester  and
A. Ed Colburn
W. James Grichar
Affiliation:
Tex. Agric. Exp. Stn., Yoakum, TX 77995
Paul R. Nester
Affiliation:
Am. Cyanamid Co., The Woodlands, TX 77381
A. Ed Colburn
Affiliation:
Tex. Agric. Ext. Serv., College Station, TX 77843
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Abstract

Experiments were conducted from 1988 through 1991 to evaluate the effectiveness of imazethapyr alone and in combination with metolachlor for control of yellow and purple nutsedge. Imazethapyr alone at 0.07 kg ha–1 controlled yellow nutsedge irregularly while the addition of metolachlor greatly improved control. Metolachlor preplant incorporated (PPI) followed by imazethapyr at ground-crack (GC) or postemergence (POST) controlled 72 to 96% of yellow nutsedge, whereas a tank-mix of metolachlor plus imazethapyr PPI controlled 85 to 96%. The addition of metolachlor to imazethapyr did not result in any improvement in control of purple nutsedge. Metolachlor plus imazethapyr PPI controlled ≥ 85% of purple nutsedge PPI, whereas imazethapyr POST controlled ≥ 94%.

Keywords

Imazethapyr, (±)–2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidmetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidepeanut, Arachis hypogaea L. ‘Florunner’purple nutsedge, Cyperus rotundus L. ♯ CYPROyellow nutsedge, Cyperus esculentus L. ♯ CYPESMetolachlortiming of applicationpurple nutsedgeyellow nutsedgeCYPESCYPRO
Type
Research
Information
Weed Technology , Volume 6 , Issue 2 , June 1992 , pp. 396 - 400
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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