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Metabolism of Trifluralin in Peanuts and Sweet Potatoes

Published online by Cambridge University Press:  12 June 2017

P. K. Biswas  and
Willie Hamilton Jr.
P. K. Biswas
Affiliation:
Carver Research Foundation, Tuskegee Institute, Alabama
Willie Hamilton Jr.
Affiliation:
Carver Research Foundation, Tuskegee Institute, Alabama
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Abstract

Several investigations were undertaken to study the metabolism of alpha,alpha,alpha-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) by intact peanut (Arachis hypogaea L.) and sweet potato (Ipomoea batatas L.) plants and crude extracts of these plants. Attempts also were made to determine the biological activity of three isolated degradative intermediates. Accumulated data indicated that trifluralin was degraded by both intact and crude extracts of these plants; the degradation pathway differing in each instance. In crude extracts of peanuts, the initial degradation product was an incomplete dealkylated derivative of the parent compound, alpha, alpha, alpha-trifluro-2,6-dinitro-N-propyl-p-toluidine. The initial degradation product formed in sweet potato crude extracts was a reduced derivative of trifluralin, N2,N2-di-n-propyl-3-nitro-5-trifluromethyl-o-phenylenediamine. All isolated degradation intermediates used in bioassay studies demonstrated root inhibition in cucumber (Cucumis sativus L.) at many of the concentration levels utilized. The greatest amount of root inhibition was observed in cucumber seeds germinated in alpha,alpha,alpha-trifluro-2,6-dinitro-N-(n-propyl)-p-toluidine.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 2 , April 1969 , pp. 206 - 211
Copyright
Copyright © 1969 Weed Science Society of America 

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