Susceptibility status of Phlebotomus papatasi and Sergentomyia punjabaensis (Diptera:Psychodidae) to some insecticides in district Bikaner (Rajasthan).

ABSTRACT

Susceptibility tests were carried out on the females of two species of sandflies viz. Phlebotomus papatasi and Sergentomyia punjabaensis against six insecticides viz. DDT, dieldrin (organochlorines); malathion, fenitrothion (organophosphates); propoxur (carbamate) and permethrin (synthetic pyrethroid) in district Bikaner, Rajasthan. A concentration and time dependent effect was observed with insecticides for both the species. P. papatasi was found resistant to DDT, dieldrin and propoxur while susceptible to malathion, fenitrothion and permethrin. However, S. punjabensis was found susceptible to all the insecticides tested. LC50 and LT50 value estimated for DDT and dieldrin for P. papatasi and S. punjabaensis were found to be 2.2 and 0.3% x 1 hr and 1.45 and 0.032% x 15 min. respectively.