INSECTICIDE SUSCEPTIBILITY STATUS OF DENGUE VECTORS, AEDES AEGYPTI(L.) AND AEDES ALBOPICTUS (S.) IN SELECTED LOCALITIES OF DISTRICT DEHRADUN, UTTARAKHAND

Dengue is one of the most common arthropod borne viral disease which is transmitted mainly by two vector species Aedes aegypti and Ae. albopictus. Immature stages were collected from selected localities of district Dehradun and incubated for hatching in insecterium for rearing upto adult stage. The adults were then identified by using the pictorial keys. The susceptibility status of both the species against different insecticides was assessed by using the WHO standard bioassay tests. Larval bioassays of both the population shows incipient resistance against temphos while adult susceptibility testing results showed that Ae. aegypti was resistant to DDT and Fenitrothion, susceptible for Endosulphan and probable resistant to Malathion, Deltamethrin and Permethrin, while Ae. albopictus is resistant to DDT and Probable resistant to other insecticides.