Abai, MR

6th International Congress of DipterologyBionomics of malaria vector, Anopheles d’thali (Diptera:Culicidae) in a malarious area, Bandar Abbas, Hormozganprovince, southern IranVatandoost, H., M. Shahi, A.A. Hanafi-Bojd, M.R. Abai, & M.A. OshaghiSchool of Public Health & Institute of Health Research, Tehran University of MedicalSciences, P.O.Box: 6446 Tehran 14155 Iran; E-mail: hvatandoost@yahoo.comEcology of An.d’thali was studied in Bandar Abbas county, where there isindigenous malaria. This species plays as a secondary malaria vector in theregion. Adult and larvae were collected from different habitats.Susceptibility tests were carried out according to WHO methods to adiagnostic dose of 10 insecticides. The irritability to 4 pyrethroids byWHO insecticides impregnated papers were determined. Four larvicideswere used at the diagnostic dose. All the concentrations were provided byWHO. An. d'thali is active throughout the year in mountainous area withtwo peaks of activity. This species usually rests outdoors. It has differentlarval habitats. Insecticides susceptibility tests on adult females exhibitedsusceptibility to all insecticides recommended by WHO. LT 50 for thecurrently used insecticide, lambdacyhalothrin, is measured less than oneminute. The irritability tests to pyrethroid insecticides showed thatpermethrin and lambdacyhalothrin had more irritancy compared todeltamethrin and cyfluthrin. Larval bioassay using malathion, chlorpyrifos,temephos and fenitrothion did not show any sign of resistance to theselarvicides at the diagnostic dose.Although the Hormozgan province had been sprayed with DDT since 1952and subsequently with malathion from 1968, but An.d’thali remainedsusceptible to DDT 4% and dieldrin 0.4%. Furthermore, this species ishighly susceptible to organophosphate, carbamate and pyrethroidinsecticides. This insecticides can be used for malaria vector control in theregion.Key Words: ecology, Anopheles d’thali, malaria, Iran, resistance291