中文摘要：

目的探索山丘地区复杂环境灭螺新模式,为制定灭螺对策提供科学依据。方法由政府主导实施血防灭螺承包责任制,灭螺结束后对当季灭螺质量进行评估,第二年春季对近期灭螺效果进行评估。结果实施灭螺承包责任制后,钉螺面积下降率从承包前的53.4%上升至承包后的100%,螺点压缩率从54.6%上升到100%。灭螺所需投入从2.03元/m2下降至0.69元/m2,灭螺成本从3.73元/m2下降至0.75元/m2,灭螺工效从承包前的12.0m2/工上升至承包后的36.7m2/工。灭螺药物每年使用量从7.50t下降到3.20t,下降了57.3%。群众血防灭螺承包责任制知晓率和认可率均为92.5%。结论实施血防灭螺承包责任制后,山丘地区复杂环境灭螺资金使用绩效、灭螺质量、灭螺工效得到大幅度提高,节约了灭螺药物。

英文摘要：

Objective To explore a new molluscicidal pattern suitable for the complicated environments in hilly regions,soa s to provide the evidence for making the strategy of Oncomelania snail control.Methods The contracted responsibility systemf or snail control was implemented by government.The quality of control work was evaluated in the same year and the recent mollus-c icidal effect was assessed in the next spring.Results After the intervention,the decline rate of snail areas increased from 53.4%t o 100%;the compression rate of snail spots increased from 54.6%to 100%;the input of fund for snail control decreased from 2.03Y uan/m2 to 0.69 Yuan/m2;the cost of snail control decreased from 3.73 Yuan/m2 to 0.75 Yuan/m2;the work efficiency increasedf rom 12.0 m2/（man-day）to 36.7 m2/（man-day）;the molluscicide decreased from 7.50 tons/year to 3.20 tons/year and the de-c line rate was 57.3%.The awareness rate and recognized rate of the contracted responsibility system for snail control were both9 2.5%.Conclusion The contracted responsibility system for snail control can increase financing efficiency,molluscicidal quali-t y and work efficiency,and save molluscicide in complicated environments of hilly regions.