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Influence of AC 263,222 Rate and Application Method on Weed Management in Peanut (Arachis hypogaea)

Published online by Cambridge University Press:  12 June 2017

Theodore M. Webster ,
John W. Wilcut  and
Harold D. Coble
Theodore M. Webster
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7620
John W. Wilcut
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7620
Harold D. Coble
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7620
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Abstract

Experiments were conducted in 1991 and 1992 to evaluate the weed control effectiveness from several rates of AC 263,222 applied PPI and PRE (36 and 72 g ai/ha), early POST (EPOST) (18, 36, 54, or 72 g/ha), POST (18, 36, 54, or 72 g/ha), and EPOST followed by (fb) POST (27 fb 27 g/ha or 36 fb 36 g/ha). These treatments were compared to the commercial standard of bentazon at 0.28 kg ai/ha plus paraquat at 0.14 kg ai/ha EPOST fb bentazon at 0.56 kg/ha plus paraquat at 0.14 kg/ha plus 2,4-DB at 0.28 kg ae/ha. Application method had little effect on weed control with AC 263,222. In contrast, application rate affected control. Purple nutsedge, yellow nutsedge, prickly sida, smallflower morningglory, bristly starbur, common cocklebur, and coffee senna were controlled at least 82% with AC 263,222 at 36 g/ha (one-half the maximum registered use rate) regardless of application method. AC 263,222 at 72 g/ha (registered use rate) controlled sicklepod 84 to 93%, Florida beggarweed 65 to 100%, and Ipomoea morningglory species 89 to 99%. A single application of AC 263,222 at 36 g/ha or more controlled all weeds (with the exception of Florida beggarweed) as well or greater than sequential applications of bentazon plus paraquat fb bentazon, paraquat, and 2,4-DB. All rates of AC 263,222 applied POST and all application methods of AC 263,222 at 72 g/ha had better yields than the pendimethalin control.

Keywords

2,4-DB, 4-(2,4-dichlorophenoxy)butanoic acidparaquat, 1,1'-dimethyl-4,4'-bipyridinium ionbristly starbur, Acanthospermum hispidum DC. # ACNHIcoffee senna, Cassia occidentalis L. # CASOCcommon cocklebur, Xanthium strumarium L. # XANSTFlorida beggarweed, Desmodium tortuosum (Sw.) DC. # DEDTOmorningglory species, Ipomoea spp.prickly sida, Sida spinosa L. # SIDSPpurple nutsedge, Cyperus rotundus L. # CYPROsicklepod, Senna obtusifolia (L.) Irwin and Barneby # CASOByellow nutsedge, Cyperus esculentus L. # CYPESBentazonparaquat2,4-DBAcanthospermum hispidumCassia occidentalisCyperus esculentusCyperus rotundusDesmodium tortuosumIpomoea hederaceaACNHICASOCXANSTDEDTOSIDSPCYPROCASOBIAQTACYPESC, cotyledonDAP, days after plantingEPOST, early postfb, followed byL, leafVNG, viningPOST, postemergencePPI, preplant incorporatedPRE, preemergence.
Type
Research
Information
Weed Technology , Volume 11 , Issue 3 , September 1997 , pp. 520 - 526
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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