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Nutsedge (Cyperus spp.) Control in Peanut (Arachis hypogaea) with AC 263,222 and Imazethapyr

Published online by Cambridge University Press:  12 June 2017

W. James Grichar  and
Paul R. Nester
W. James Grichar
Affiliation:
Texas Agricultural Experiment Station, Yoakum, TX 77995
Paul R. Nester
Affiliation:
American Cyanamid Co., The Woodlands, TX 77381
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Abstract

Experiments were conducted from 1991 through 1993 to evaluate AC 263,222 and imazethapyr for yellow and purple nutsedge control in peanut. AC 263,222 at 0.05 to 0.07 kg/ha controlled purple nutsedge (88 to 99% late season) whether applied preplant incorporated (PPI), preemergence (PRE), early postemergence (EPOST) at peanut emergence, or postemergence (POST). Yellow nutsedge control with AC 263,222 was inconsistent at the 0.04 kg/ha rate; however, the 0.05 and 0.07 rate gave 88% early season yellow nutsedge control, but late season control was variable. Yellow nutsedge control with soil-applied treatments of AC 263,222 and imazethapyr were similar but AC 263,222 provided better postemergence control than did imazethapyr. Purple nutsedge control was similar for both herbicides across all application methods.

Keywords

AC 263,222, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-methyl-3-pyrindinecarboxylic acidimazethapyr, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidpurple nutsedge, Cyperus rotundus L. # CYPROyellow nutsedge, Cyperus esculentus L. # CYPESpeanut, Arachis hypogaea L. ‘Florunner.'Timing of applicationCyperus esculentusCyperus rotundusCYPESCYPRODAT, days after treatmentEPOST, early postemergencePOST, postemergencePPI, preplant incorporatedPRE, preemergence
Type
Research
Information
Weed Technology , Volume 11 , Issue 4 , December 1997 , pp. 714 - 719
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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