摘要
目的实验室和现场试验评价密达利(META-Li,40%四聚乙醛水乳剂)杀灭湖北钉螺的效果。方法室内:采用泥缸喷洒法、烧杯浸杀法和三角沉淀杯上爬法,用敲击法观察不同时间、不同浓度密达利对湖北钉螺的杀灭和抑制上爬作用。现场:选择安徽省芜湖县草滩进行现场喷洒试验,密达利剂量为1、2和4g/m2,设氯硝柳胺药物对照剂量为1g/m2和清水空白对照组,观察施药后3、7和15d检查钉螺存活情况。结果室内喷洒试验:24、48和72h的半数致死剂量(LD50)分别为0.78、0.44和0.46g/m2;室内浸杀试验:24、48、72h的半数致死浓度(LC50)分别为44.4、27.4和24.8mg/L;24h抑制钉螺上爬半数有效浓度(EC50)为5.86mg/L。现场喷洒试验:密达利2g/m2喷洒后7d钉螺死亡率大于90%,灭螺效果和氯硝柳胺1g/m2相当(P>0.05)。结论密达利室内及现场喷洒灭螺效果明显,有抑制钉螺上爬作用。
Objective To evaluate the molluscicidal effect of the META-Li （40% META liquid formulation） against Oncomelania snails in laboratory and field. Methods The experiment of META-Li against the snails by spraying, immersion and climbing-inhibition test was carried out in laboratory. Spray method was performed in the field to compare with the wettable powder of 50% niclosamide ethanolamine salt. Results In laboratory, the LC50 of META-Li by spraying for 1, 2, 3 days was 0.78, 0.44 and 0.46 g/m^2 respectively; by immersion method for 1, 2, 3 days, it was 44.4, 27.4 and 24.8 mg/L respectively. When sprayed with active ingredient 2 g/m^2 of META-Li in the field, the snail death rate was above 90% after 7 days, similar to that of nielosamide. Conclusion META-Li shows high molluscicidal and climbing-inhibition effect on Oncomelania snails.
出处
《中国寄生虫学与寄生虫病杂志》
CAS
CSCD
北大核心
2006年第3期200-203,共4页
Chinese Journal of Parasitology and Parasitic Diseases
关键词
密达利
四聚乙醛
钉螺
杀螺剂
Meta-Li
Metaldehyde
Oncomelania hupensis
Molluscicide
