Comparative study on the susceptibility status of three common mosquitoes species in Makurdi to eight different insecticides using who test tube bioassays

Abstract

Comparative susceptibility study of Aedes aegypti, Anopheles gambiae and Culex quinquefasciatus to eight insecticides in four classes was conducted using 2 – 5 day old laboratory reared, non-blood fed adult female mosquitoes. Standard WHO test tubes bioassay method was adopted with two thousand four hundred (2400) female mosquitoes. The study revealed that Ae. aegypti was resistant to Dichlorodiphenyltrichloroethane (DDT – an organochlorine), showed suspected resistant to Permethrin and Lambdacyhalothrin, susceptible to Deltamethrin, Alphacypermethrin, Bendiocarb, Propoxur, Pirimiphos methyl and to all the pyrethroids. An. gambiae was found to be resistant to Deltamethrin, Alphacypermethrin, Permethrin and DDT but susceptible to Lambdacyhalothrin, Bendiocarb, Propoxur and Pirimiphos-methyl. Cx. quinquefasciatus showed suspected resistant to Alphacypermethrin, Lambdacyhalothrin and Bendiocarb. Cx. quinquefasciatus was found to be highly resistant to DDT, Permethrin, Deltamethrin and Propoxur but susceptible to Pirimiphos-methyl and resistant to all pyrethroids, the Cx. quinquefasciatus had the highest level of resistance among the three species of the mosquitoes used in the study and all were resistant to DDT.