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Absorption, Translocation, and Metabolism of Foliar-Applied Trifloxysulfuron in Tobacco

Published online by Cambridge University Press:  20 January 2017

Shawn C. Troxler ,
Loren R. Fisher ,
W. David Smith  and
John W. Wilcut
Shawn C. Troxler
Affiliation:
Crop Science Department, Campus Box 7620, North Carolina State University, Raleigh, NC 27695
Loren R. Fisher*
Affiliation:
Crop Science Department, Campus Box 7620, North Carolina State University, Raleigh, NC 27695
W. David Smith
Affiliation:
Crop Science Department, Campus Box 7620, North Carolina State University, Raleigh, NC 27695
John W. Wilcut
Affiliation:
Crop Science Department, Campus Box 7620, North Carolina State University, Raleigh, NC 27695
*
Corresponding author's E-mail: loren_fisher@ncsu.edu
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Abstract

Research was conducted to evaluate absorption, translocation, and metabolism of foliar-applied trifloxysulfuron in flue-cured tobacco. The majority of 14C-trifloxysulfuron was absorbed by 4 h, with an accumulation in the plant of 43% of the radioactivity after 72 h. Translocation of radioactivity did not significantly differ between harvest timings of 4 to 72 h after treatment. Not more than 4% of applied 14C-trifloxysulfuron moved out of the treated leaves of tobacco, whereas less than 1.9% accumulated in any one part. Tobacco metabolized 14C-trifloxysulfuron rapidly, with 60.9% of the absorbed herbicide remaining in the parent herbicide form 4 h after treatment, whereas only 12.1% remained after 72 h. These data suggest that limited absorption and translocation, as well as rapid metabolism, are the basis for tobacco tolerance to foliar-applied trifloxysulfuron and illustrate the potential safe and effective use of trifloxysulfuron in tobacco for POST weed control.

Keywords

Trifloxysulfuronflue-cured tobacco, Nicotiana tabacum L. ‘NC 72’TolerancesafetyPOST
Type
Research
Information
Weed Technology , Volume 21 , Issue 2 , June 2007 , pp. 421 - 425
Copyright
Copyright © Weed Science Society of America 

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