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Residue Studies of Tomato Foliage and Fruits from Plants Receiving PEBC-C14 Pre- or Post-Emergence

Published online by Cambridge University Press:  12 June 2017

S. C. Fang  and
Elizabeth Fallin
S. C. Fang
Affiliation:
Department of Agricultural Chemistry, Oregon Agricultural Experiment Station, Corvallis, Oregon
Elizabeth Fallin
Affiliation:
Department of Agricultural Chemistry, Oregon Agricultural Experiment Station, Corvallis, Oregon
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Abstract

S-propyl-1-C14-N,N-ethyl, n-butylthiolcarbamate (PEBC-C14) residue was generally higher in the roots than in the corresponding above-ground portions, and also greater in plants receiving a higher rate of treatment The concentration decreased as a function of time after treatment. The average values of PEBC residue in the fresh foliage, during the first two weeks after receiving a lay-by treatment at blooming stage, were 0.098, 0.465 and 0.860 ppm for 1, 4 and 8 lb/A rates respectively. No PEBC residue was found in fruits from plants receiving any rate of treatment at blooming stage. A small amount of the residue was found in fruits from plants treated at early fruiting stage and this decreased rapidly to zero level after four or five weeks.

The metabolic breakdown of PEBC in the tomato foliage and fruits is a first-order process. The rate constant for PEBC breakdown seemed to depend upon the tissue as well as the stage of growth.

Type
Research Article
Information
Weeds , Volume 13 , Issue 2 , April 1965 , pp. 152 - 155
Copyright
Copyright © 1965 Weed Science Society of America 

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References

Literature Cited

1. Fang, S. C. and Theisen, Patricia. 1959. An isotopic study of ethyl-N,N-di-n-propylthiolcarbamate (EPTC-S35) residue in various crops. J. Agr. Food Chem. 7:770–771.Google Scholar
2. Fang, S. C. and Theisen, Patricia. 1960. Uptake of radioactive ethyl-N,N-di-n-propylthiolcarbamate (EPTC-S35) and translocation of sulfur-35 in various crops. J. Agr. Food Chem. 8:295–298.Google Scholar