5%杀螺胺乙醇胺盐颗粒剂云南山区现场杀螺效果

目的观察5%杀螺胺乙醇胺盐颗粒剂(NEG)在云南高原山区的现场杀螺效果。方法在云南省鹤庆县金墩乡孝廉行政村北登自然村选取钉螺孳生草地开展现场灭螺试验。试验分7组,即30、40 g/m2和50 g/m2NEG组,40 g/m2NEG+清障组,6 g/m250%氯硝柳胺乙醇胺盐粉剂(WPN)组,6 g/m2WPN+清障组和清水对照组,灭螺7、15、30 d后,比较不同组钉螺死亡率和活螺密度变化。结果施药7、15、30 d后,30、40 g/m2和50 g/m2NEG组钉螺死亡率为72.75%~95.83%,活螺平均密度下降率为72.26%~95.54%;随着药物剂量的增加,钉螺死亡率逐渐上升,活螺平均密度逐渐下降。施药7、15、30 d后,40 g/m2NEG组钉螺死亡率为81.69%~87.19%,活螺平均密度下降率为81.42%~87.91%;40 g/m2NEG+除障组钉螺死亡率为84.89%~88.24%,活螺平均密度下降率为85.63%~88.22%;6 g/m2WPN组钉螺死亡率为85.23%~86.17%,活螺平均密度下降率为85.76%~86.05%;6 g/m2WPN+除障组钉螺死亡率为88.89%~92.10%,活螺平均密度下降率为86.71%~92.20%。灭螺前进行割草等环境清障后的灭螺效果相对较好。结论 NEG在云南山区现场杀螺效果较好,是一种适合高原山区现场应用的新型杀螺剂。

Molluscicidal effect of 5% powder of niclosamide ethanolamine salt granules (NEG) in field of mountainous areas in Yunnan Province

Objective Objective To evaluate the molluscicidal effect of 5% powder of niclosamide ethanolamine salt granules（NEG）in the field of mountainous areas in Yunnan Province. Methods Methods The grasslands with Oncomelania hupensis snail habitats werechosen in Beideng Village，Heqing County，Yunnan Province，and were divided into 7 groups（groups of NEG 30 g/m2，NEG 40g/m2，NEG 50 g/m2，NEG 40 g/m2plus obstacle clearing，50% niclosamide ethanolamine salt wettable powder（WPN）6 g/m2，WPN 6 g/m2plus obstacle clearing，and fresh water） . The snail death rates and the densities of living snails were investigatedand the results were compared in the different groups 7 d，15 d，and 30 d after the implementation. Resul Result ts s Seven d，15 d，and 30 d after the implementation，the snail death rates of the groups of NEG 30 g/m2，40 g/m2，and 50 g/m2were from 72.75％to 95.83％，and the average descent rates of living snail densities were from 72.26％ to 95.54％. Seven d，15 d，and 30 d afterthe implementation，in the NEG 40 g/m2group，the snail death rates were from 81.69% to 87.19%，and the average descentrates of living snail densities were from 81.42% to 87.91%；in the NEG 40 g/m2plus obstacle clearing group，the snail deathrates were from 84.89% to 88.24% and the average descent rates of living snail densities were from 85.63%～88.22%；in theWPN 6 g/m2group，the snail death rates were from 85.23% to 86.17% and the average descent rates of living snail densitieswere from 85.76% to 86.05%；in the WPN 6 g/m2plus obstacle clearing group，the snail death rates were from 88.89% to92.10% and the average descent rates of living snail densities were from 86.71% to 92.20%. The obstacle clearing improved themolluscicidal effect. Conclusion Conclusion NEG has a good molluscicidal effect in the field of mountainous areas in Yunnan Province.