Toxicity of DDT Isomers to Some Insects Affecting Man

Abstract
In tests against body lice by the beaker test method in acetone-water suspension, o o''-DDT was slightly toxic to the adult and 4th-instar larvae of the common malaria mosquito and the adult housefly and body louse. Although o p''-DDT was ineffective against adult mosquitoes, houseflies, and body lice, it was a fairly effective anopheline larvicide. For adult houseflies and mosquitoes, 1 ml. of a 1% soln. of each isomer in kerosene was sprayed into a 100 cu. ft. chamber in which the insects were exposed in screen wire cages and tested by a pendulum-swinging method.

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