The influence of ambient temperature on the insecticiide resistance of Aedes aegypti larvae to the temephos: An organophosphate insecticide

Abstract

Insecticides are the most common management strategy used for the control of mosquitoes. The changes in ambient temperature can alter the toxicity of insecticides to ectothermic organisms. We examined the influence of temperature on the development of resistance against temephos of larvae Aedes aegypti (Diptera: Culicidae). LC50 was estimated for larvae Ae. aegypti when exposed to six concentration of temephos (0.004, 0.006, 0.009, 0.012, 0.015, and 0.020 ppm) and the temperature 23, 26, 30, 32, and 34oC for 24 hours in larvae assays. If mosquito populations are expanding in space and time because of increased temperatures due to global warming and cannot be managed as effectively with organophosphate, the spread of mosquito-borne diseases may pose considerable risk to public health.