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目的观察单纯黑色地膜覆盖法在云南山区的灭螺效果,为推广其使用提供科学依据。方法选择南涧县乐秋村的有螺梯田,按从上到下的顺序分成A、B、C、D、E 5组,其中A、B、C、D 4组为实验组,实施单纯黑色地膜覆盖灭螺,覆膜时间分别为30、60、90 d和120 d;E组为对照组,采用50%氯硝柳胺乙醇胺盐可湿性粉剂喷洒灭螺,比较两种方法的灭螺效果与成本。结果单纯黑色地膜覆盖法覆膜90 d和120 d后,覆膜区域均未查到钉螺,活螺平均密度与灭螺前相比下降100%,1年的灭螺成本不高于对照组。结论单纯黑色地膜覆盖法灭螺效果较好,可在不宜开展药物灭螺地区推广应用。
Objective To observe the snail-killing effect of pure black mulch in Yunnan mountain area and provide a scientific basis for the promotion of its use. Methods The terraced fields in Leqiu Village, Nanjian County were divided into A, B, C, D and E 5 groups according to the sequence from top to bottom. Groups A, B, C and D 4 were experimental groups, Mulching and mulching were applied for 30, 60, 90 days and 120 days, respectively. In group E, the control group was sprayed with 50% niclosamide ethanolamine wettable powder for snail control. And cost. Results After the black film mulching was applied for 90 d and 120 d, the average area density of live snails was decreased by 100% compared with that before molting. The cost of snail-killing for one year was not higher than that of the control group. Conclusion Simple black plastic film mulching method is better than snail control, which can be applied in areas not suitable for drug snail control.