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Improvement of the Residual Toxicity of DDT Solutions by the addition of Coumarone Resin

Published online by Cambridge University Press:  10 July 2009

N. Van Tiel
N. Van Tiel
Affiliation:
Koninklijke Shell-Laboratorium, Amsterdam.
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Extract

An investigation was made into means of increasing the effectiveness of the usual DDT-containing residual sprays with a kerosene base.

The common house-fly, Musca domestica, was used as biological material.

It was found that there exists a distinct relationship between crystal size and residual toxicity. Finely crystalline residues from DDT solutions in volatile solvents, such as xylene, proved to be considerably more toxic than coarsely crystalline residues from DDT solutions in less volatile solvents, such as kerosene. Addition of small quantities of coumarone resin to a DDT solution in kerosene was found to reduce the size of the DDT crystals and to increase the toxicity considerably.

Type
Research Article
Information
Bulletin of Entomological Research , Volume 43 , Issue 2 , July 1952 , pp. 413 - 419
Copyright
Copyright © Cambridge University Press 1952

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