Molecular forms of the Indian Anopheles subpictus complex differ in their susceptibility to insecticides and the presence of knockdown resistance (kdr) mutations in the voltage-gated sodium channel.

Objectives: To investigate the differential insecticide-susceptibility of two molecular forms of Anopheles subpictus complex (A and B) against DDT and pyrethroids, the occurrence of knockdown resistance (kdr) mutations in these forms, and the association of kdr mutations with insecticide resistance.

Methods: Insecticide susceptibility tests of An. subpictus s.