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目的 观察麻风树素灭螺效果及毒性。方法 以麻风树素室内浸杀钉螺和现场喷洒灭螺 ,并对淡水鱼和哺乳动物的毒性进行了观察。结果 1室内浸杀钉螺当麻风树素在 6 mg/ L 浓度下 ,2 4h钉螺死亡率达 90 % ,48h达 10 0 % ;12 mg/L 浓度下可杀死 5 9%的螺卵 ;2现场喷洒灭螺实验 ,3g/ m2组灭后 5 d钉螺死亡率 87.3% ,6 g/ m2组达 10 0 % ;3初步应用 6g/ m2的量 ,喷药后 3d活螺平均密度下降 98.8% ,钉螺校正死亡率达 99.3% ;4施药后钉螺上爬明显 ,1h上爬率达 86 %～92 % ,可影响其杀螺效果 ;5麻风树素粉剂室内浸杀也有较强的灭螺效果 ;6中国云南和非洲马里产麻风树素杀螺效果基本一致 ;7麻风树素对淡水鱼具有中度毒性 ,对小鼠具有低度急性毒性 ,对家兔皮肤和眼未见有刺激性 ,对小鼠未见有致突变作用。结论 麻风树素是一种高效、低毒杀螺剂。
Objective To observe the effect and toxicity of leprosyin on snail. Methods Lepidoptera was used to dip snails and field snails to kill snails. The toxicity of freshwater fish and mammals was also observed. Results 1: In the laboratory, when the concentration of leprosy was 6 mg / L, the death rate of snails was 90% at 4 mg / L, and 10% at 48 h. 5,2% of spiro eggs were killed at 12 mg / L; On the spot spraying molluscicidal test, the mortality of Oncomelania snails was 87.3% on the 5th day after the 3g / m2 group was off and 10% on the 6g / m2 group. The average density of live snails decreased by 98.8% , The corrected mortality rate of snails was 99.3%; 4 snails climbing significantly after application, 1h climb rate of 86% to 92%, which can affect the snail killing effect; 5 leprosy powder indoor dip also strong snail Effect 6 Leprosyin in Mali, China, Yunnan and Africa was found to be consistent in its killing effect; 7 Leprosy was moderately toxic to freshwater fish and had low acute toxicity to mice and no irritation to rabbit skin and eyes , No mutagenic effect on mice. Conclusion Leprosyin is a highly effective and low poisoning agent.