Abstract:

Objective To evaluate the molluscicidal effect of the buried niclosamide sustained?release method in Oncomela? nia snail?infested terraced environments of mountainous areas in Yunnan Province. Methods A piece of relatively isolated snail? infested terraced environment was selected as experimental plot and randomly divided into four groups. The buried niclosamide sus? tained?release methods were performed in Group A，B，C with the doses of 6 g/m2 ，12 g/m2 ，24 g/m2 respectively，and Group D was sprayed with 50% niclosamide ethanolamine salt wettable powder（2 g/m2 ）as the control. Results In Group C（with the bur? ied niclosamide sustained?release method of 24 g/m2 ），the half?year reduction of living snail density was 89.90%，and one?year re? duction of living snail density was 96.80%，which were significantly higher than those of Group D（40.35% and 59.11%） （Both P < 0.01）Conclusion The buried niclosamide sustained?release method is effective and suitable for snail control in mountainous terrace areas.

Key words: Oncomelania hupensis；Niclosamide； Sustained?release method； Mountainous area

摘要：

目的 目的 观察土埋氯硝柳胺缓释法在云南山区梯田环境的灭螺效果。方法 方法 在云南山区选择一块梯田， 分隔后随机分成A、 B、 C、 D 4组， 其中A、 B、 C 3组为实验组， D组为对照组。实验组分别按剂量6、 12、 24 g/m2 实施土埋氯硝柳胺缓释法灭螺， 对照组50%氯硝柳胺乙醇胺盐可湿性粉剂2 g/m2 喷洒灭螺。结果 结果 施药6个月和1年后活螺平均密度下降率、 土埋氯硝柳胺缓释法24 g/m2 组分别为89.90%和96.80%， 对照组为40.35%和59.11%， 两者差异有统计学意义 （χ2 0.5年 ＝ 151.24，χ2 1年 ＝117.14， P均＜0.01）。结论 结论 土埋氯硝柳胺缓释法灭螺效果较好， 适用于缺水的山区梯田等环境灭螺。

关键词: 钉螺； 氯硝柳胺乙醇胺盐可湿性粉剂； 缓释法； 灭螺； 山区