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目的 评价 2 5 %氯硝柳胺悬浮剂 ( SCN)的实验室和现场杀螺效果。方法 采用实验室及现场浸杀和喷洒法进行 SCN杀螺试验 ,同时以 5 0 %氯硝柳胺乙醇胺盐可湿性粉剂 ( WPN)和清水做对照试验。结果 室内浸杀 :SCN2 4h L C50 为 0 .0 474m g/ L;WPN L C50 为 0 .0 947mg/ L;二者间杀螺率差异有非常显著性 ( P<0 .0 1)。室内喷洒 :用 SCN 0 .2 5、0 .5 0、1.0 0、2 .0 0 g/ ( L· m2 )各浓度组杀螺率均高于对应的 WPN各浓度组的杀螺率。现场浸杀 :用 SCN 2 mg/ L (有效浓度 0 .5 mg/ L ) ,对投放的螺袋内钉螺和沟内泥土中筛取钉螺的杀螺率均高于 WPN 2 mg/ L (有效浓度 1.0 mg/ L )浸杀。现场喷洒也同样显示 2 g/ ( L· m2 ) SCN杀螺率高于 2 g/ ( L· m2 ) WPN的杀螺率。结论 2 mg/ L或 2 g/ ( L· m2 ) SCN浸杀或喷洒 ,其杀螺率高于 2 mg/ L或 2 g/ ( L· m2 ) WPN ;SCN是一种高效、价廉、使用方便的新剂型 ;建议在进一步扩大试验的基础上 ,进行现场推广使用
Objective To evaluate the laboratory and field kill effects of 25% niclosamide SCN. Methods SCN snail killing test was conducted by laboratory and field immersion and spraying methods. At the same time, the control group was treated with 50% niclosamide ethanolamine wettable powder (WPN) and water. Results Indoor immersion: SCN2 4h L C50 0. 0 474m g / L; WPN L C50 0. 0 947mg / L; the difference between the kill rate was very significant (P <0.01). Indoor Spraying: The SCI rates of SCN 0.2, 0.5, 5.0, 1.0 and 2.0 g / (L · m2) were higher than those of the corresponding WPN concentration groups. In situ Baptist: The SCN 2 mg / L (effective concentration 0.5 mg / L) was higher than that of WPN 2 mg / L Concentration 1.0 mg / L) dip. Field spraying also showed that the kill rate of 2 g / (L · m2) SCN was higher than 2 g / (L · m2) WPN. Conclusion SCN is 2 WP or 2 g / (L · m2) WPN when immersed in 2 mg / L or 2 g / (L · m2) SCN. SCN is an efficient, Easy to use new dosage forms; it is recommended to further expand the test based on the site to promote the use of