不同杀螺剂现场灭螺效果比较

目的比较25％氯硝柳胺乙醇胺盐悬浮剂（SCNE）、50％氯硝柳胺乙醇胺盐可湿性粉剂（WPN）、40％密达利、50％荣宝的现场灭螺效果，为选择安全、高效的灭螺药物提供依据。方法选择4处螺情相似的有螺环境，分别用上述4种药物喷洒灭螺，于施药后3、7、15d开展钉螺调查，比较不同药物的灭螺效果。结果施药后3、7、15d，SCNE灭螺现场的钉螺校正死亡率为93．13％、91．85％、85．28％，WPN为89．82％、86．97％、77．66％，密达利为85．26％、89．47％、8t．25％，荣宝为77．23％、73．28％、78．15％。结论SCNE杀螺效果较好，值得进一步推广应用。

Comparison of field molluscicidal effects of four molluscicides

Objective To compare the field molluscicidal effects of 25%suspension concentrate of nielosamide ethanolamine salt(SCNE),50% wettable powder of niclosamide ethanolamine salt(WPN),40% META-Li and 50% Rongbao powder,so as to provide scientific basis for choosing the safe and highly effective molluscicide in field.Methods Four snail habitats with the similar snail status were selected and sprayed with the four molluscicides mentioned above,respectively.Then the snail status in the four fields was surveyed 3,7 and 17 d after the spraying and the moiluscicidal effects of difierent molluscieides were cornpared.Results The corrected mortalities of snails in the field sprayed with SCNE 3,7 and 17 d afterthe spraying were the hiishest among the four fields,with the rates of 93.13%,91.85% and 85.28%,respectively.Conclusion SCNE has a high molluseieidal effect in the field and can be further used in snail-infested areas.