Status of insecticide resistance in anopheles culicifacies [diptera: culicidae] in Ghasreghand district, Sistan and Baluchistan province, Iran

ABSTRACT

Anopheles culicifacies s.L plays an important role in transmission of malaria in Sistan and Baluchistan province, southeastern Iran. Adult susceptibility test on field-collected mosquitoes was conducted in Ghasreghand district. WHO diagnostic test procedures revealed that adult females were resistant to 0.4% dieldrin [mortality 64.5 +/- 3.13], tolerant to 0.1% propoxur [mortality 88.5 +/- 2.24] and susceptible to 4% DDT [mortality 98.75 +/- 0.8], 5% malathion [mortality 100%], 0.1% bendiocarb [mortality 98.86 +/- 0.7], 0.25% permethrin [mortality 98.4 +/- 0.1] and 0.1% lambdacyhalothrin [mortality 100%]. Malathion and lambdacyhalothrin had the highest efficacy against this species when they were exposed at the diagnostic dose for 1 hour followed by a 24 hour recovery period. Dieldrin, DDT and malathion had been used for malaria control as an indoor residual spraying. The implication of these findings in the control programme is discussed