强螺杀粉剂杀灭皖南山区钉螺效果观察

Observation on molluscicidal effect of qiangluocide powder in south mountainous areas of Anhui Province

目的观察强螺杀粉剂(4％氯硝柳胺乙醇胺盐粉剂)对山丘地区残存钉螺的杀灭效果。方法实验室采用泥盘接触法比较强螺杀粉剂喷粉与50％氯硝柳胺乙醇胺盐可湿性粉剂喷洒灭螺效果。现场试验分强螺杀粉剂环境清理组、未清理组及常规喷洒法未清理组进行,观察3组灭螺效果。结果室内强螺杀粉剂喷粉与50％氯硝柳胺乙醇胺盐可湿性粉剂1、3、7 d的钉螺死亡率均 >95％,差异均无显著性(X2分别为0．346、0．346、1．013,P均>0．05)。现场试验强螺杀粉剂喷粉环境清理组、未清理组和喷洒法环境未清理组的灭螺效果均>95％,3组之间7 d的钉螺死亡率差异无显著性(X2=-8．572,P>0．05),3组之间15 d的钉螺死亡率差异亦无显著性(X2=2．765,P> 0．05),活螺平均密度下降率均>98％。结论强螺杀粉剂喷粉与50％氯硝柳胺乙醇胺盐可湿性粉剂喷洒灭螺效果一致,而且不需用水、不需清理环境,特别适合杀灭山丘地区钉螺。

Objective To evaluate the molluscieidal effect of qiangluoeide powder （4% niclosamide ethanolamine salt） in mountainous areas. Methods The molluscicidal effects of qiangluocide powder and 50% niclosamide ethanolamine salt wettable powder were compared by the contacting method in laboratory. The experiment groups in fields were divided into three groups： qiangluocide powder in cleaned environment, qiangluocide powder in uncleaned environment and 50% niclosamide ethanolamine salt wettable powder in uncleaned environment. Results The snail mortalities of the two groups were all more than 95% in laboratory, and the differences of the mortalities on Day 1,3,7 were not significant （X^2=0. 346, 0. 346, 1. 013, all P〉0.05）. The mortalities of the three fields groups were more than 95%, the difference of the mortalities on Day 7 was not significant （X^2= -8.572, P〉0.05 ）, the difference of the mortalities on Day 15 was not significant, either （X^2=2.765,P〉0. 05）, and the reduced rates of snail density were more than 98%. Conclusion The molluseieidal effect of qiangluoeide powder and 50% nielosamide ethanolamine salt wettable powder are equivalent, and the method of dusting with qiangluocide powder do not need water and cleaning environment and it is suitable for mountainous areas.