Abstract
Malathion resistance in a population of Anopheles culicifacies from Maharashtra State in India, which also showed resistance to a number of other organophosphorus compounds, was found to be dominant in its expression. Most of the crossing and back-crossing results involving a susceptible population of the same species from Sri Lanka indicated the possible involvement of more than one genetic factor. The existence of such a broad spectrum of resistance, and experiments involving the use of the synergists triphenyl phosphate and piperonyl butoxide both suggest the presence of at least two mechanisms, one involving the specific carboxylesterase and the other the less specific mixed-function oxidase system.
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Selected References
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