Susceptibility Status of Immature and Adult Stages of Aedes aegypti Against Conventional Insecticides in Delhi, India

Insecticide-susceptibility tests were carried out using WHO standard test kits against various organophosphates, organochlorine s, carbamates and synthetic pyrethroid compounds under ambient room temperature of 27 + 1 o C and relative humidity of 75-80%. The results revealed that adult Aedes aegypti was resistant to DDT and dieldrin, tolerant to propoxur and fenitrothion, but was susceptible to malathion, deltamethrin, permethrin and lambdacyhalothrin. However, the larvae were found to be susceptible to all the three larvicides tested, viz. temephos, fenthion and malathion.