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Postemergence Hemp Sesbania (Sesbania exaltata) Control in Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

P. Roy Vidrine ,
Daniel B. Reynolds  and
James L. Griffin
P. Roy Vidrine
Affiliation:
Dean Lee Res. Stn., 8105 E. Campus, Alexandria, LA 71302
Daniel B. Reynolds
Affiliation:
Northeast Res. Stn., Box 438, St Joseph, LA 71366
James L. Griffin
Affiliation:
Dep. Plant Pathol. Crop Physiol., 302 Life Sci. Bldg., Baton Rouge, LA 70803
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Abstract

Field studies were conducted at three locations in Louisiana over two years to evaluate mid-season, foliar-applied acifluorfen, fomesafen, and lactofen for hemp sesbania control in soybean. Acifluorfen and fomesafen were applied POST at 30, 40, 50, 60, 70, 140, and 280 g ai ha–1 and lactofen was applied at 60, 80, 110, and 220 g ai ha–1. The data fit a quadratic model and log transformations were made to determine differences between treatments. Hemp sesbania control was highly correlated with herbicide rate for each herbicide. Averaged over rates of application, acifluorfen and fomesafen provided equivalent control of hemp sesbania, which was greater than that achieved with lactofen. The minimum effective rate of acifluorfen or fomesafen for 80 and 100% control of 50- to 60-cm hemp sesbania was 50 and 140 g ha–1, respectively. The minimum effective lactofen rate to provide at least 80% control was 220 g har–1.

Keywords

Acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidfomesafen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-N-(methyl-sulfonyl)-2-nitrobenzamidelactofen, (±)-2-ethoxy-1-methyl-2-oxoethyl 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoatehemp sesbania, Sesbania exaltata (Raf.) Rydb. ex A. W. Hill ♯ SEBEXsoybean, Glycine max (L.) Merr.Minimum effective ratereduced ratesacifluorfenfomesafenlactofenSEBEXcoffeebean
Type
Research
Information
Weed Technology , Volume 6 , Issue 2 , June 1992 , pp. 374 - 377
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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