Studies on Aqueous Suspensions of Insecticides. Part III. Factors affecting the Persistence of some Synthetic Insecticides

Abstract

Factors affecting the persistence of deposits from aqueous suspensions of insecticides have been studied.There is an inverse relationship between particle size of insecticides and the initial contact toxicity to mosquitos. The influence of particle size on effectiveness decreases as the intrinsic toxicity of the insecticide increases. The compounds investigated can be arranged in order of immediate contact toxicity to mosquitos (Aëdes aegypti): dieldrin ≥ gamma-BHC > aldrin > DDT.