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目的 通过扩大现场试验 ,掌握烟氯复合物和硼镁石粉的现场灭螺效果。方法 采用浸杀法、喷洒法和撒粉法进行现场灭螺试验。结果 采用烟氯复合物 0 .8m g/ L 和氯硝柳胺 2 m g/ L 平行比较灭螺 ,浸杀法 30 d的钉螺校正死亡率分别为 91.5 7%和 92 .38% ;喷洒法 30 d的钉螺校正死亡率分别为 90 .0 2 %和 90 .5 6 %。采用硼镁石粉 80 g/ m2撒粉 ,雨天和晴天撒粉 ,30 d的钉螺校正死亡率分别为 76 .10 %和 93.0 0 %。结论 采用烟氯复合物 0 .8m g/ L 以及氯硝柳胺 2 mg/ L 进行浸杀和喷洒灭螺 ,其灭螺效果基本一致 ,但烟氯复合物灭螺的用量比氯硝柳胺减少了 6 0 .0 0 %。硼镁石粉具有杀灭钉螺的作用。晴天撒粉比雨天撒粉灭螺效果要好 ,半年后灭螺效果开始下降
OBJECTIVE To expand the field trials to master the on-site snail killing effects of smoke-chlorine complexes and borophosphate powder. Methods Immersion method, spraying method and dusting method were used to carry out on-the-spot snail test. Results The relative mortality of snail was 91.5 7% and 92.38% respectively by spraying 0. 8 m g / L of smoke and chlorine compound and 2 mg / L niclosamide for 30 days. Spraying method 30 The corrected mortality of snails at day d was 90.0% and 90.56%, respectively. With the boric acid powder 80 g / m2 dusting, rainy and sunny days, the corrected mortality of Oncomelania snails 30 days was 76.10% and 93.0% respectively. Conclusion The results showed that the molluscicidal effect of molybdate complex was better than that of niclosamide when it was treated with 0.8 kg / L nicotine chloride and 2 mg / L niclosamide. A decrease of 60.0%. Magnesite powder has the effect of killing snails. Sunny dusting better than dusting molluscicum effect of rain, molluscum effect began to decline after six months