Laboratory Evaluation of Synthetic Pyrethroid-treated Cotton Fabric Against Mosquitoes and Other Domestic Pests

Abstract

Abstract

The bio-efficacy of deltamethrin, lambdacyhalothrin, cyfluthrin, and etofenprox treated cotton fabric was determined against mosquitoes and other domestic pests, viz Anopheles stephensi Liston, Aedes aegypti Linnaeus, Culex quinquefasciatus Say, Phlebotomus argentipes Linnaeus, Musca domestica nebulo Linnaeus, Periplaneta americana Linnaeus and Cimex lectularius Linnaeus under laboratory conditions. The results revealed that cotton fabric treated with different insecticides had shown variable degrees of impact against different mosquito species and domestic pests. An. stephensi was the most susceptible, followed by Ae. aegypti, Cx. quinquefasciatus, P. argentipes, P. americana, M. domestica nebulo and C. lectularius. Deltamethrin-treated cotton fabric was most promising, followed by lambdacyhalothrin, cyfluthrin and etofenprox. LD₅₀ values ranged from 5.2-40 mg/m² for An. stephensi, Ae. aegypti and Cx. quinquefasciatus with different synthetic pyrethroids. Similarly, LD₅₀ values for P. argentipes, P. americana, M. domestica nebulo and C. lectularius varied from 48 to 135 mg/m². LD₉₀ values ranged from 58.8-120 mg/m2 for An. stephensi, Ae. aegypti and Cx. quinquefasciatus with different synthetic pyrethroids. LD90 values varied from 85.8 to 180 mg/m² with different pyrethroids for P. argentipes, P. americana, M. domestica nebulo and C. lectularius. Statistical analysis revealed that deltamethrin is marginally superior to other insecticides (P < 0.5).

Keywords : pyrethroid-treated cotton fabric, mosquitoes, domestic pests, deltamethrin, lambdacyhalothrin, cyfluthrin, etofenprox