Susceptibility of Culex quinquefasciatus (Diptera: Culicidae) to Deltamethrin in District Sargodha

Present study was conducted to determine the resistance status of Culex quanquefasciatus to deltamethrin (0.5%) in district Sargodha. Only blood fed female mosquitoes were sampled for the study and subjected to residual bioassay test. The mortality rate was 100% after 24 hours of deltamethrin (0.5%) exposure. Results of residual bioassays revealed that population of Culex quanquefasciatus in study area is susceptible to recommended dose of deltamethrin (0.5%). Calculated LT50 was 6.38 hours. Non-significant difference was observed in the activities of estrases, monooxegenases and glutathione-S-transferases (GSTs) in control and treated groups of C. quinquefasciatus. It is concluded that mosquito population in the study area is not resistant to the recommended dose of deltamethrin.