关键词: 电蚊香, 杀虫剂, 蚊虫, 击倒中时, PTC热敏电阻

Abstract: The solidified liquid electric mosquito-repellent incense (SLEMRI) is made up of three parts: heating apparatus(PTC), a little aluminium pit (20mm in diameter)and two-pin plug, Esbiothrin insecticide and a controlled-release formulation are added to the pit. The pit is laid on the PTC. The solidi solidibied lied esbinthrin is transforming into liquid state with evaporation to air twhen the electric circuit is set up on. The liquid esbiothrin is transforming into solíd state when the electric circuit is broken. The little pit aided 16) mg esbiothrin can be used for 7 nights(8-10 hours each night). The present experiments were undertaken to determine the effects of SLEMRI against female adult mosquitoes.Tests were made with the knockdown activity of SLEMRI against mosqui toes in the laboratory and with the protective effect in living rooms. Mean KT₅₀ of SLEMRI against female Ae.aegypti, Ae.albopictus, An. dirus, Cx. tritaeniorhynchus. Cx. quinquefasciatus and Cx. pipiens pollens following 20 minutes exposure in a glass cabinet (0.343m³)were 2.0, 3.2, 2.8, 2.4, 5.0 anb 5.9 minutes, respectivly. The 24-hour mortalities were 100, 81.2, 99.0, 100, 35.3 and 20.3%, respectively, Mean KT₅₀ of free-flying mosquitoes (Cx. pipiens pollens) following 7 hours exposure in the 41.2m³ test room with door and windows closed were 71.6-111.2 minutes. Free-flying mosquitoes were knockdown more rapidly than caged ones. The protection effect of SLEMRI tested live was 91.5%.