author(s)
Muhammad Mohsin, Dr. Jamila Shafi, Samina Iqbal Naz, Saba Aslam and Shahzad Hassan

abstract
A study on susceptibility status of Anopheles species of mosquitoes was conducted in district Faisalabad, Pakistan. Toxicity of six different insecticides such as 4% DDT, 0.05% Deltamethrin, 0.05% Lambdacyhalothrin, 0.05% Permethrin, 5% Malathion and 0.1% Bandiocarb was studied and tested against six Anopheles species, An. stephensi, An. culicifacies, An. subpictus, An. annularus, An. fluviaitlis and An. pulcherimus under field and laboratory condition at 27-29^oC and 95-97% humidity. All Anopheles species have become resistant to 4% DDT with a maximum 77.27% mortality. An. stephensi, An. culicifacies and An. subpictus, have also become resistant to Deltamethrin 0.05%, lambdacyhalothrin 0.05% with mortality range of 33.33% to 93.33%. An. annularis and An. fluviaitilis exhibited mortality range of 92.69% to 100%. An. pulcherimus were found susceptible to Deltamethrin and lambdacyhalothrin with 100% mortality under lab condition. An. stephensi exhibited resistance to malathion but An. culicifacies and An. subpictus requires further verifications with 90.00% to 96.36% mortality rate, while An. annularus and An. pulcherimus were susceptible to malathion but again An. fluviaitlis requires verification against malathion under laboratory condition. An. stephensi requires verification in field condition but it was susceptible under lab condition against bandiocarb. While the remaining tested species were susceptible to bandiocarb under both laboratory and field conditions with 100% mortalities. Resistance development in Anopheles species and malaria vectors against DDT and pyrethroids group is a matter of concern, which can influence the efforts done for malarial control. However, bandiocarb appears to be the best alternative to pyrethroids.