四聚·杀螺胺悬浮剂云南山区现场灭螺效果

Molluscicidal effect of suspension concentrate of metaldehyde and niclosamide in fields of mountainous areas in Yunnan Province

目的观察26%四聚杀螺胺悬浮剂(MNSC)在云南省山区现场的灭螺效果。方法在云南省鹤庆县血吸虫病流行区选择有钉螺环境的玉米地和沟道,采用机械喷洒和喷壶喷洒灭螺,每种环境每种方法分MNSC和50%氯硝柳胺乙醇胺盐可湿性粉剂(WPN)2组。机械喷洒剂量6 g/m2,1次完成;喷壶喷洒每次剂量2 g/m2,3次,每次间隔7 d,总量6 g/m2。结果机械喷洒灭螺后7、15、30 d,玉米地MNSC组钉螺死亡率为88.68%～92.88%,WPN组为89.86%～90.32%,沟道MNSC组钉螺死亡率为89.97%～94.46%,WPN组为90.08%～96.74%,灭螺前和灭螺后2组钉螺死亡率差异均无统计学意义(P均>0.05)。喷壶灭螺后7、15、30 d,玉米地MNSC组钉螺死亡率为66.14%～89.11%,WPN组为78.40%～91.22%,沟道MNSC组钉螺死亡率为84.13%～94.27%,WPN组为85.81%～95.26%,2组钉螺死亡率差异均无统计学意义(P均>0.05)。结论26%四聚·杀螺胺悬浮剂在云南省山区现场灭螺效果较好。

Objective To evaluate the molluscicidal effect of 26% suspension concentrate of metaldehyde and niclosamide （MNSC） in the fields of mountainous areas in Yunnan Province Methods Some representative Oncomelania snail environments of schistosomiasis endemic regions were selected as study areas in Heqing County, Yunnan Province and 26%MNSC and 50% wet-table powder of niclosamide ethanolamine salt （WPN） were used to kill the snails with the mechanical spraying and sprinkler spraying methods respectively. Results Seven, 15, 30 days after the spraying with the mechanical spraying method, in corn fields,the snail mortality rates were from 88.68% to 92.88% in the MNSC group, and from 89.86% to 90.32% in the WPN group respectively, and in the ditch, the snail mortality rates were from 89.97% to 94.46% in the MNSC group and from 90.08% to 96.74% in the WPN group respectively, and there was no significant difference between the 2 groups （P 〉 0.05） ; 7, 15, 30 days after the spraying with the sprinkler spraying method, in corn fields, the snail mortality rates were from 66.14% to 89.1 1% in the MNSC group, and from 78.40% to 91.22% in the WPN group, respectively, in the ditch, the snail mortality rates were from 84.13% to 94.27% in the MNSC group, and from 85.81% to 95.26% in the WPN group respectively, and there was no significant difference between the 2 groups （P 〉 0.05）. Conclusion 26% MNSC has good molluscicidal effect in the fields of mountainous areas in Yunnan Province