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Imazethapyr and Paraquat Systems for Weed Management in Peanut (Arachis hypogaea)

Published online by Cambridge University Press:  12 June 2017

John W. Wilcut ,
John S. Richburg III ,
E. Ford Eastin ,
Gerald R. Wiley ,
F. Robert Walls Jr.  and
S. Newell
John W. Wilcut
Affiliation:
Dep. of Crop and Soil Sci., Box 748, Coastal Plain Exp. Stn., Univ. of Georgia, Tifton, GA31794
John S. Richburg III
Affiliation:
Dep. of Crop and Soil Sci., Box 748, Coastal Plain Exp. Stn., Univ. of Georgia, Tifton, GA31794
E. Ford Eastin
Affiliation:
Dep. of Crop and Soil Sci., Box 748, Coastal Plain Exp. Stn., Univ. of Georgia, Tifton, GA31794
Gerald R. Wiley
Affiliation:
American Cyanamid Corp., Tifton, GA 31794
F. Robert Walls Jr.
Affiliation:
American Cyanamid Corp., Goldsboro, NC 27530
S. Newell
Affiliation:
Zeneca, Statesboro, GA 30458
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Abstract

Field studies conducted at six locations in Georgia and one location in Virginia evaluated imazethapyr and imazethapyr mixtures for weed control, crop tolerance, and peanut yield. Imazethapyr applied early postemergence controlled bristly starbur, coffee senna, common cocklebur, Ipomoea species, jimsonweed, prickly sida, and smallflower morningglory at least 91% and controlled yellow and purple nutsedge 88 and 98%, respectively. Paraquat plus bentazon applied early postemergence did not control the aforementioned weeds as well as imazethapyr or imazethapyr mixtures. Paraquat applied with imazethapyr reduced bristly starbur control 15% compared to imazethapyr alone but did not influence control of the other species. Imazethapyr control of bristly starbur was not improved by the addition of bentazon. Sicklepod control was less than 24% with imazethapyr and was at least 58% with imazethapyr plus paraquat Imazethapyr plus paraquat controlled sicklepod better than paraquat plus bentazon at three of the four locations evaluated. Imazethapyr did not control Florida beggarweed, while imazethapyr plus paraquat controlled at least 53%. Peanut injury was minimal 30 d after application for all treatments.

Keywords

paraquat, 1,1′dimethyl-4,4′-bipyridinium ion2,4-DB, (2,4-dichlorophenoxy)butanoic acidbristly starbur, Acanthospermum hispidum DC. # ACNHIFlorida beggarweed, Desmodium tortuosum (Sw.) DC. # DEDTOjimsonweed, Datura stramonium L. # DATSTprickly sida, Sida spinosa L. # SIDSPpurple nutsedge, Cyperus rotundus L. # CYPROsicklepod, Cassia obtusifolia L. # CASOByellow nutsedge, Cyperus esculentus L. # CYPESACNHICASOBCASOCCYPESCYPROBATSTDEDTOIAQTAIPOHEIPOHGIPOLAPHBPUSIDSPXANSTcontrolpostemergence
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 42 , Issue 4 , December 1994 , pp. 601 - 607
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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