The Efficacy of Bed-net Impregnation in Insecticide with Active Ingredient of Alphacypermethrin Againts Filariasis Vector of Culex quinguefasciatusSuwasonoHadiauthorThe efficacy test of the residual effect of alphacypermethrin onto the impregnated bed-net against filariasis vector Cx. quinguefasciatus was carried out in Salatiga. The bed-net made of nylon with sized of 200 x 180 x 200 cm available in the market. Four dosages of insecticide 0.01 ml/m2; 0.02 ml/m2; 0.03 ml/m2 and 0.04 ml/m2 were determined for impregnating the bed-net. The impregnated bed-net was installed on the bed of 5 houses. Contact bioassay was conducted every week until 4th week and bi-weekly through 12th week. The result showed that the residual dosage of both 0.01 ml/m2 was effective for approximately 2 weeks where as the residual dosage of both 0.03 ml/m2 and 0.04 ml/m2 was effective for 8 weeks.WC 680-950 Tropical and Parasitic Diseases2003Pusat Penelitian dan Pengembangan Ekologi KesehatanMonograph