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Uptake, Translocation, and Metabolism of Root Absorbed Sulfentrazone and Sulfentrazone plus Clomazone in Flue-Cured Tobacco Transplants

Published online by Cambridge University Press:  20 January 2017

Loren R. Fisher ,
Ian C. Burke ,
Andrew J. Price ,
W. David Smith  and
John W. Wilcut
Loren R. Fisher*
Affiliation:
Crop Science Department, Campus Box 7620, North Carolina State University, Raleigh, NC 27695–7620
Ian C. Burke
Affiliation:
USDA Southern Weed Science Research Unit, Stoneville, MS 38776
Andrew J. Price
Affiliation:
USDA National Soil Dynamics Lab., Auburn, AL 36832
W. David Smith
Affiliation:
Crop Science Department, Campus Box 7620, North Carolina State University, Raleigh, NC 27695–7620
John W. Wilcut
Affiliation:
Crop Science Department, Campus Box 7620, North Carolina State University, Raleigh, NC 27695–7620
*
Corresponding author's E-mail: loren_fisher@ncsu.edu.
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Abstract

Research was conducted to evaluate root uptake, translocation, and metabolism of 14C-sulfentrazone alone or in a mixture with clomazone in solution in flue-cured tobacco transplants. Uptake and translocation of sulfentrazone was rapid and was not affected by the addition of clomazone. Fifty-nine and 65% of the 14C absorbed by the plant was translocated to the leaves within 24 h with sulfentrazone alone and in the clomazone plus sulfentrazone mixture, respectively. Differences in plant metabolism were observed between sulfentrazone alone and sulfentrazone plus clomazone. After 3 h, 66% of the 14C recovered from the leaves was metabolized when sulfentrazone was applied alone, compared to 91% when sulfentrazone was applied with clomazone. The difference could indicate that metabolism of sulfentrazone by tobacco transplants was enhanced by the presence of clomazone.

Keywords

Clomazone, sulfentrazone, flue-cured tobacco, Nicotiana tabacum L. ‘NC 71’Enhanced metabolismsafeningtoleranceHAT, hours after treatmentLSS, liquid scintillation spectrometryPPI, preplant incorporated treatmentPRE-T, pre-emergence soil surface treatment
Type
Research
Information
Weed Technology , Volume 20 , Issue 4 , December 2006 , pp. 898 - 902
Copyright
Copyright © Weed Science Society of America 

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