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Sulfentrazone adsorption and mobility as affected by soil and pH

Published online by Cambridge University Press:  12 June 2017

Timothy L. Grey ,
Robert H. Walker ,
Glenn R. Wehtje  and
H. Gary Hancock
Timothy L. Grey*
Affiliation:
Department of Agronomy and Soils, Alabama Agricultural Experiment Station, Auburn University, Auburn, AL 36849-5412
Robert H. Walker
Affiliation:
Department of Agronomy and Soils, Alabama Agricultural Experiment Station, Auburn University, Auburn, AL 36849-5412
Glenn R. Wehtje
Affiliation:
Department of Agronomy and Soils, Alabama Agricultural Experiment Station, Auburn University, Auburn, AL 36849-5412
H. Gary Hancock
Affiliation:
FMC Corp., Hamilton, GA 31811
*
Corresponding address: 1733 N Longgrove Rd., Cecilia, KY 42724.
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Abstract

Laboratory experiments were conducted to evaluate soil adsorption and mobility of sulfentrazone. Sulfentrazone is a new phenyl triazolinone herbicide intended for use in soybean. Adsorption was evaluated through a soil solution technique, and mobility was evaluated with soil thin-layer chromatography. Experimental variables included soil, sulfentrazone concentration (adsorption study only), and pH. Adsorption was influenced by all experimental variables; however, pH had the greatest effect. Adsorption generally decreased in response to increasing pH. However, the greatest decrease occurred above the pKa of sulfentrazone (i.e., 6.56). Mobility generally reflected adsorption.

Keywords

SulfentrazoneSorptionclay mineralogyFreundlichherbicide ionizationpKaleachingdistribution coefficient
Type
Soil, Air, and Water
Information
Weed Science , Volume 45 , Issue 5 , October 1997 , pp. 733 - 738
Copyright
Copyright © 1997 by the Weed Science Society of America 

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