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Wild Poinsettia (Euphorbia heterophylla) Control in Peanut (Arachis hypogaea)

Published online by Cambridge University Press:  12 June 2017

J. David Moore ,
Philip A. Banks  and
Carol L. Pinnell-Alison
J. David Moore
Affiliation:
Agron. Dep., Univ. Georgia, Athens, GA 30602
Philip A. Banks
Affiliation:
Agron. Dep., Univ. Georgia, Athens, GA 30602
Carol L. Pinnell-Alison*
Affiliation:
Agron. Dep., Univ. Georgia, Athens, GA 30602
*
Current address for the third author: Louisiana Coop. Ext. Serv., Franklin Parish, Winnsboro, LA 71295.
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Abstract

Wild poinsettia control in peanut was evaluated following various preplant-incorporated and postemergence herbicide applications. The addition of vernolate or alachlor to a preplant-incorporated treatment of benefin improved wild poinsettia control obtained with treatments of lactofen or paraquat plus alachlor applied at the time of peanut emergence. Lactofen applied postemergence following lactofen plus alachlor applied at the time of peanut emergence provided ≥92% wild poinsettia control and peanut yields equivalent to the handweeded control. Treatments of paraquat plus alachlor applied at the time of peanut emergence followed by acifluorfen (applied once or twice) or paraquat followed by acifluorfen provided good (74 to 100%) wild poinsettia control for up to 12 weeks after planting and peanut yields not different from the handweeded plots. Treatments that did not provide at least 92% wild poinsettia control when evaluated 5 weeks after planting resulted in significant peanut yield reduction compared to the handweeded control.

Keywords

Acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidalachlor, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamidebenefin, N-butyl- N-ethyl-2,6-dinitro-4-(trifluoromethyl)benzaminelactofen, (±)-2-ethoxy-1-methyl-2-oxoethyl5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoateparaquat, 1,1′-dimethyl-4,4′-bipyridinium ionvernolate, S-propyl dipropylcarbamothioatewild poinsettia, Euphorbia heterophylla L. # EPHHLpeanut, Arachis hypogaea L. ‘Florunner’AcifluorfenalachlorbenefinlactofenparaquatvernolateEPHHL
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 38 , Issue 6 , November 1990 , pp. 536 - 540
Copyright
Copyright © 1990 by the Weed Science Society of America 

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Footnotes

1

This research was supported by state and federal funds provided to the Georgia Agric. Exp. Stn. and by a grant from the Georgia Agric. Commodity Comm. for Peanuts.

References

Literature Cited

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