Abstract:

Objective To explore an economical and efficient molluscicidal method suitable for large area of nursery stock field. Methods Two nursery stock fields with Oncomelania hupensis were selected as experimental sites， and an experimental group and a control group were set. In the experimental group， the molluscacide and herbicide were alternately used （a purification molluscicidal method） during the period of May to October， 2011. In the control group， grass shoveling and soil burying combined with molluscacide were used in the same period. The snail control effects of the two groups were observed and the costs of the two methods were analyzed. Results No living snails were found in both experimental and control groups three consecutive years after the snail control intervention above mentioned. The costs of snail control intervention in the experimental group and control group were 0.90 and 1.80 Yuan/m2， respectively. Conclusion The effect of the purification molluscicidal method in nursery stock field is satisfying， and the cost is lower.

Key words: Oncomelania hupensis, Molluscicide, Herbicide, Cost-effectiveness analysis

摘要：

目的 探索适合大面积苗木田的经济有效的灭螺方法。方法 选择2块大面积有螺苗木田块为试验现场，设试验组和对照组。2011年5-10月，试验组交替使用杀螺剂和除草剂进行灭螺（净化灭螺法）；对照组用铲草土埋加药杀进行灭螺（改良灭螺法），连续3年观察灭螺效果，并进行成本分析。结果 试验组和对照组连续3年均未发现活螺。试验组灭螺成本为0.90元/m2，对照组为1.80元/m2。结论 采用净化灭螺法在苗木田环境灭螺效果理想，且成本较低。

关键词: 钉螺, 杀螺剂, 除草剂, 成本效果分析