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Sulfentrazone Dissipation in a Tennessee Soil

Published online by Cambridge University Press:  20 January 2017

G. Anthony Ohmes ,
Robert M. Hayes  and
Thomas C. Mueller
G. Anthony Ohmes
Affiliation:
University of Tennessee, Department of Plant and Soil Sciences, Knoxville, TN 37901-1071
Robert M. Hayes
Affiliation:
University of Tennessee, Department of Plant and Soil Sciences, Knoxville, TN 37901-1071
Thomas C. Mueller*
Affiliation:
University of Tennessee, Department of Plant and Soil Sciences, Knoxville, TN 37901-1071
*
Corresponding author's E-mail: [email protected].
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Abstract

Sulfentrazone dissipation in soil was examined in field experiments in 1995, 1996, and 1997 at Knoxville, TN, on a Sequatchie loam soil. Sulfentrazone 50% disappearance time (DT50) varied from 24 to 113 d. Cotton injury was observed the year following sulfentrazone application when half-lives were ≥85 d. Sulfentrazone degradation under controlled laboratory conditions was slower in autoclaved soil than in nonautoclaved surface soil and subsurface soil, with DT50 of 198, 93, and 102 d, respectively. The difference due to autoclaving the soil implied that sulfentrazone degradation was influenced by both microbial and chemical mechanisms.

Keywords

Glyphosate, isopropylamine salt of N-(phosphonomethyl)glycinepyrithiobac, sodium 2-chloro-6-[(4,6 dimethoxy-2-pyrimidinyl)thio]benzoatesulfentrazone, N-[2,4-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]phenyl]methanesulfonamidesoybean, Glycine max (L.) Merr. ‘Asgrow 5601’cotton, Gossypium hirsutum L. ‘Paymaster 1220RR’Degradationhalf-lifeHPLCDAT, days after treatmentDT50, 50% disappearance timeHPLC, high performance liquid chromatographyWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 14 , Issue 1 , March 2000 , pp. 100 - 105
Copyright
Copyright © Weed Science Society of America 

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