Abstract: Objective To evaluate the effect of a novel plant molluscicide“Luo?wei” （Tea?seed distilled saponins，TDS） against Oncomelania hupensis in the field of lake areas in Hanchuan City，Hubei Province. Methods Immersing experiment and spraying experiment were carried out in 5 ditches and a beach land respectively in Hanchuan City，Hubei Province to compare the molluscicidal effects among 4% TDS，50% wettable powder of niclosamide ethanolamine salt（WPN），and 26% suspension con? centrate of metaldehyde and niclosamide（MNSC）by different dosages and time. The χ2 test or Fish’ s exact test was used to ex? amine the differences of snail death rates among them. Results After 72 h of immersing experiment，the snail death rates in the 2.5 g/m3 TDS group，3.0 g/m3 TDS group，2.0 g/m3 WPN group and 2.0 g/m3 MNSC group were 99.33%，100%，100%，and 100%，respectively，and there was no significant difference among them（P > 0.05） . By the end of 15 d after the spraying experi? ments，the snail death rates were 91.86% in the 2.0 g/m2 MNSC group，90.26% in the 5.0 g/m2 TDS group，87.45% in the 2 g/m2 WPN group，and 86.10% in the 3 g/m2 TDS group. The differences between the 5.0 g/m2 TDS group and 2.0 g/m2 MNSC group，as well as the 3.0 g/m2 TDS group and the 2.0 g/m2 WPN group had no statistical significance（both P > 0.05） . Conclusions The molluscicidal effect of TDS is similar to that of WPN or MNSC. The recommended dosage of TDS is 2.5 g/m3 for immersing or 5 g/ m2 for spraying in the field.

摘要： 目的 目的 评价植物杀螺剂4%螺威粉剂 （TDS） 在汉川市湖沼型现场的灭螺效果。方法 方法 选择5条有螺沟渠和一片有 螺河滩分别进行浸杀试验和喷洒试验， 比较不同剂量 TDS、 50%氯硝柳胺乙醇胺盐 （WPN） 和26%四聚杀螺胺悬浮剂 （MN? SC） 在不同时间的现场杀螺效果。结果 结果 浸杀试验72 h后， 2.5 g/m3 和3.0 g/m3 TDS组、 2.0 g/m3 WPN组、 2.0 g/m3 MNSC组钉 螺死亡率依次为99.33%、 100%、 100%和100%， 各施药组间差异无统计学意义 （P > 0.05）。喷洒试验15 d后， 3.0 g/m2 和5.0 g/m2 TDS组、 2.0 g/m2 WPN组、 2.0 g/m2 MNSC组钉螺死亡率分别为86.10%、 90.26%、 87.45%、 91.86%， 5.0 g/m2 TDS组与MN? SC组、 3.0 g/m2 TDS组与WPN组差异均无统计学意义 （P均> 0.05）。 结论 结论 TDS的现场灭螺效果与WPN和MNSC相当， 在 现场灭螺中以浸杀法2.5 g/m3 、 喷洒法5.0 g/m2 的推荐剂量较为合理。

关键词: 钉螺； 螺威； 氯硝柳胺； 四聚杀螺胺； 杀螺效果； 植物杀螺剂