关键词: 溴氰菊酯, 泡腾片, 乳油, 浸泡蚊帐, 致倦库蚊, 淡色库蚊

Abstract: Objective To evaluate the effect of mosquito nets treated by deltamethrin effervescent tablets or emulsifiable concentrate(EC) on Culex pipiens pallens and Cx.pipiens quinquefasciatus. Methods Mosquitoes were forced to contact treated nets. Results The efficacy of two formulation of deltamethrin to Cx.p.pallens reached 100% at the concentration of 2 mg·ai/m², but that to Cx.p.quinquefasciatus was under 100% at the concentration of 10 mg·ai/m². The LC₅₀ of mosquito nets treated with deltamethrin effervescent tablets and EC to Cx.p.pallens were 0.23 mg·ai/ml and 0.31 mg·ai/ml, respectively. There were statistical differences between them (t=3.04, P=0.023). However, the LC₅₀ of net treated with deltamethrin effervescent tablets and EC to Cx.p.quinquefasciatus were 1.16 mg·ai/ml and 1.33 mg·ai/ml, respectively. There were no statistical differences between them(t=1.65, P=0.470). The control efficacy of deltamethrin effervescent tablets and EC to Cx.p.pallens and Cx. p.quinquefasciatus increases with the concentration of chemicals, and nevertheless the values of LT₅₀ distinctly shorten. Mortality and median knockdown time of net treated by deltamethrin effervescent tablets to Cx.p.pallens and Cx.p.quinquefasciatus were more infective than that of deltamethrin EC. Conclusion Effervescent tablets, as a new formulation to treat mosquito nets, had a good effect against mosquitoes.