【摘要】 拟保幼激素杀虫剂Ｓ－３１１８３０．５％颗粒剂，在实验室条件下对致倦库蚊、白纹伊蚊、中华按蚊Ⅳ龄幼虫有很强的阻碍羽化作用，其半数阻碍羽化浓度（ＥＣ（５０））分别为０．０４７、０．１３、１．５７μｇａ·ｉ／Ｌ：对３种蚊幼阻碍羽化率达９５％以上的使用浓度分别是０．２７、２．４３、２４．３μｇａ·ｉ／Ｌ致倦库蚊幼虫发育受药物不同浓度的影响，幼虫被药物处理后，大部分死亡出现在蛹期，但浓度在０．０９μｇａ·ｉ／Ｌ，部分幼虫在羽化期死亡，成蚊（羽化不全）死亡率是１３．１％；当浓度提高为１００μｇａ·ｉ／Ｌ，幼虫期死亡率达６．７％，蛹死亡率为９３．３％；此外，该制剂有较好的滞留效果，１００μｇａ·ｉ／Ｌ时对致倦库蚊幼虫滞效达１个月以上。但该制剂直接对蚊蛹药效不明显。更多还原

【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.更多还原