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Title: BEHAVIOR OF SULFENTRAZONE IN IONIC EXCHANGE RESINS, ELECTROPHORESIS GELS, AND CATION-SATURATED SOILS

Author
item GREY, TIMOTHY - UNIVERSITY OF GEORGIA
item WALKER, ROBERT - AUBURN UNIVERSITY
item WEHTJE, GLENN - AUBURN UNIVERSITY
item ADAMS, JAMES - AUBURN UNIVERSITY
item Dayan, Franck
item WEETE, JOHN - WEST VIRGINIA UNIVERSITY
item HANCOCK, H - FMC CORPORATION
item KWON, OHYUN - AUBURN UNIVERSITY

Submitted to: Weed Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/14/2000
Publication Date: N/A
Citation: N/A

Interpretive Summary: THE BEHAVIOR OF SULFENTRAZONE IN SOIL SUGGESTS THAT IT MAY EXIST IN DIFFERENT IONIC FORMS. THIS STUDY SHOWS THAT THE PH AFFECTS SULFENTRAZONE AND MAY ALTER ITS SOIL BINDING PROPERTIES.

Technical Abstract: SULFENTRAZONE PERSISTENCE IN SOIL REQUIRES MANY CROP ROTATIONAL RESTRICTIONS. THE SORPTION AND MOBILITY OF SULFENTRAZONE PLAY AN IMPORTANT ROLE IN ITS SOIL PERSISTENCE. THUS, A SERIES OF LABORATORY EXPERIMENTS WERE CONDUCTED TO MIMIC THE SOIL PROPERTIES OF CATION AND ANION EXCHANGE WITH DIFFERENT INTERMEDIATES. THE MOLECULAR CHARACTERIZATION AND IONIZATION SHIFT OF SULFENTRAZONE FROM A NEUTRAL MOLECULE TO AN ANION WERE DETERMINED USING A THREE-DIMENSIONAL GRAPHING TECHNIQUE AND TITRATION CURVE, RESPECTIVELY. SORPTION AND MOBILITY OF 2.6X10-5 M 14C-SULFENTRAZONE WERE EVALUATED USING A SOIL SOLUTION TECHNIQUE WITH ION EXCHANGE RESINS AND POLYACRYLAMIDE GEL ELECTROPHORESIS, RESPECTIVELY. SOLUTION PH RANGED FROM 4.0 TO 7.4. AS PH INCREASED, SULFENTRAZONE SORPTION TO AN ANION RESIN INCREASED AND ITS SORPTION TO A CATION RESIN DECREASED. PERCENT SULFENTRAZONE IN SOLUTION WAS PH-DEPENDENT AND RANGED BETWEEN 0 TO 18% AND 54 TO 88% FOR THE ANION AND CATION RESINS, RESPECTIVELY. MOBILITY OF SULFENTRAZONE ON A 20% POLYACRYALMIDE GEL RESULTED IN RF VALUES OF +0.02 AND +0.39 FOR PH OF 4.0 AND 7.4, RESPECTIVELY.