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AC 263,222 and Imazethapyr Rates and Mixtures for Weed Management in Peanut (Arachis hypogaea)

Published online by Cambridge University Press:  12 June 2017

John S. Richburg III ,
John W. Wilcut  and
Gerald L. Wiley
John S. Richburg III
Affiliation:
Dep. Crop and Soil Sci., Univ. Georgia, Tifton, GA 31794
John W. Wilcut
Affiliation:
Dep. Crop and Soil Sci., Univ. Georgia, Tifton, GA 31794
Gerald L. Wiley
Affiliation:
American Cyanamid Co., Tifton, GA 31794
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Abstract

Field experiments conducted at three locations in Georgia during 1991 and 1992 evaluated AC 263,222 and imazethapyr rates alone at 18, 36, 54, or 72 g ai/ha and in mixture for a total of 36, 54, or 72 g/ha of herbicide applied early-POST for weed control, peanut injury, and yield. An application of AC 263,222 at 72 g/ha controlled (> 90%) Ipomoea morningglories, sicklepod, smallflower morningglory, and yellow nutsedge in all experiments and coffee senna and Florida beggarweed at Chula in 1991. Bristly starbur was controlled at least 90% with AC 263,222 at 72 g/ha at Tifton in 1991, but less than 62% at Chula in 1991. Imazethapyr applied at 72 g/ha controlled coffee senna, Ipomoea morningglories, and smallflower morningglory at least 85%, but did not control Florida beggarweed or sicklepod and provided inconsistent bristly starbur and yellow nutsedge control. Bristly starbur and yellow nutsedge control was increased with several AC 263,222 plus imazethapyr mixtures. High peanut yields comparable to the standard were indicative of the AC 263,222 rate applied whether alone or in mixture with imazethapyr.

Keywords

AC 263,222, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-methyl-3-pyridinecarboxylic acidimazethapyr, 2-[4,5-dihydro-4-methyl-4(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidbristly starbur, Acanthospermum hispidum DC. # ACNHIcoffee senna, Cassia occidentalis L. # CASOCFlorida beggarweed, Desmodium tortuosum (Sw.) DC. # DEDTOIpomoea morningglories # IPOZZsicklepod, Senna obtusifolia (L.) Irwin and Barneby # CASOBsmallflower morningglory, Jacquemontia tamnifolia (L.) Griseb. # IAQTAyellow nutsedge, Cyperus esculentus L. # CYPESpeanut, Arachis hypogaea L.ACNHICASOBCASOCCYPESDEDTOIPOZZ
Type
Research
Information
Weed Technology , Volume 9 , Issue 4 , December 1995 , pp. 801 - 806
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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