关键词: 灭幼宝, 生物效果, 蚊虫

Abstract: A new juvenile hormone analogue,S-31183,showd high activity against 4th-instar larvaes of Culex pipiens quinquefasciatus, Aedes albopictus and Anopheles sinensis in the laboratory.The values of EC₅₀ were 0.047、0.13 and 1.57μg a.i/L Yespectively More than 95% of inhibition of emergence was caused by S-31183 at the concentration of 0.27, 2.43 and 24.3μg a.i/L respecticely when the three species were treated.There were different effects on the development of 4th-instar larvaes of Cx pipiens quinquefasciatus treated with S-31183 at various concentrations, with 13.1% mortality of abnormal adults in the emerging stage ,at the concentration of 0.09 μg a.i/L,6.7% died in the larval stage and 93.3% mortality in the pupal stage at the 0.1 μg a.i/L concentration. The residnal effect of S-31183 after application was more than a month; however, pupae treated at up 0.1 μg a.i/L resulted normal emergence for adult stage.