pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-19-1-14 Articles Paraquat Behavior as Influenced by 2, 4-DB in Peanut (Arachis hypogaea) and Selected Weeds1 Glenn Wehtje *, John W. Wilcut , and John A. McGuire 2 Assoc. Prof., Dep. Agronomy and Soils, and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849, Asst. Prof., Dep. Agronomy, Box 748, Coastal Plain Exp. Stn., Univ. of Georgia, Tifton, GA 31794–0748, and Prof., Res. Data Analysis and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849

1Alabama Agric. Exp. Stn. J. Ser. No. 3–913137.

3X-77 (a mixture of alkylaryl-polyoxyethylene glycols, free fatty acids, and isopropanol). Valent USA Corp. P.O. Box 8025, Walnut Creek, CA 94596–8025.

4Biological Sample Oxidizer OX-400. R. J. Harvey Instrument Corp., Hillsdale, NJ 07642.

 *Corresponding author. 1 1992 19 1 51 55 7 3 1992 American Peanut Research and Education Society 1992 American Peanut Research and Education Society Abstract

The interaction of 2,4-DB and paraquat on weed control and crop safety in peanuts was examined in greenhouse, field, and laboratory experiments. Tank mixtures of paraquat and 2,4-DB were no more injurious to peanuts than paraquat applied alone in greenhouse and field experiments. These tank mixtures were neither interactive nor synergistic with respect to weed control. Under field conditions, tank mixtures provided more comprehensive weed control and improved yield relative to either herbicide applied alone. Studies with 14C-labeled herbicides revealed that the absorption and translocation of paraquat and 2,4-DB was not influenced by the presence of other herbicide.

 Key Words 2,4-DB; , paraquat; , Florida beggarweed; , Desmodium tortuosum (SW.) DC; , peanut, Arachis hypogaea L; , Sicklepod, Cassia obtusifolia L. antagonism; , synergism; , translocation