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.

Significant differences in insecticide susceptibility were found between two molecular forms of An. subpictus complex in sympatric populations. The L1014F-kdr mutation was observed in Form A only, which was found to be associated with DDT, permethrin and deltamethrin resistance.