Susceptibility study of three insecticides in Aedes aegypti populations of lower Assam

Aedes aegypti, the vector for transmission of dengue virus has developed insecticide resistance over the years. In this preliminary work the susceptibility and toxicity of deltamethrin, cypermethrin and malathion to A. aegypti populations from Kokrajhar and Basugaon locality of Assam were studied. Larval bioassay and biochemical analysis revealed that the A. aegypti mosquitoes from Basugaon area are more susceptible to all the insecticides compared to Kokrajhar locality. In both the localities, deltamethrin was found to be more toxic compared to other two insecticides.