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目的观察氯硝柳胺稻田浸杀灭螺不同施药方式的灭螺效果。方法选择6处稻田,以50%氯硝柳胺乙醇胺盐可湿性粉剂浸杀量2g/m2,采用撒粉、喷洒、泼洒3种施药方式,灭螺后不同时间比较3种施药方式的灭螺效果和操作繁简。结果灭螺后7d钉螺3种施药方式的钉螺死亡率为91.97%～96.15%之间,平均活螺密度由灭前的8.12只/m2下降到0.51只/m2,降幅93.71%,撒粉法的钉螺死亡率和活螺密度降幅略高于喷洒法和泼洒法,差异无统计学意义(P>0.05)。撒粉、喷洒、泼洒3法的劳动力成本比例为1∶2∶3。结论氯硝柳胺浸杀灭螺剂量2g/m2稻田浸杀灭螺效果好,撒粉施药方式具有操作简便,不需要特殊器具,省工省时等优点,建议现场稻田浸杀灭螺中推广使用撒粉法施药。
Objective To observe the snail-killing effect of different pesticide application methods in the niclosamide-paddy field. Methods Six paddy fields were selected, and the amount of 2% niclosamide ethanolamine salt wettable powder was soaked in 3 g / m2. The three application methods of dusting, spraying and spraying were adopted. Snail effect and operation simple and easy. Results The mortality of Oncomelania snails from 91.97% to 96.15% in the three treatments of Oncomelania hupensis on the 7th day after the snail killing was 91.97% ~ 96.15%. The average live lobe density decreased from 8.12 / m2 to 0.51 / m2, down 93.71% The mortality of snails and the decrease of live lobe density were slightly higher than those of spraying method and splashing method, with no significant difference (P> 0.05). Dusting, spraying, sprinkling 3 labor cost ratio of 1: 2: 3. Conclusion The niclosamide immersion molluscicide 2g / m2 rice paddy soaked snail control effect is good, dusted application method has the advantages of easy operation, no special equipment, saving time and labor, the proposed site paddy snail snail Promote the use of dusting pesticide application.