【摘要】 目的评价在江滩地区喷洒氯硝柳胺悬浮剂(SCN)连续应用灭螺的效果。方法每年对有螺环境按SCN 2.0g/m~2,喷洒2～3次,间隔1w,考核灭螺效果。结果 2004～2010年江滩灭前活螺平均密度分别为6.00只/0.11m~2、4.25只/0.11m~2、2.04只/0.11m~2、1.95只/0.11m~2、0.97只/0.11m~2、1.35只/0.11m~2和1.58只/0.11m~2;灭后活螺平均密度分别为0 86只/0.11m~2、0.86只/0.11m~2、0.23只/0.11m~2、0.16只/0.11m~2、0.18只/0 11m~2、0.22只/0.11m~2和0.08只/0.11m~2。灭前及灭后钉螺活螺密度呈下降趋势,2010年灭后与2004年灭前相比,钉螺活螺框出现率由73.46%降为4.33%,下降了94.10%;活螺平均密度由6.00只/0.11m~2降为0.08只/0.11m~2,下降了98.67%。结论在江滩地区采用SCN连续喷洒灭螺,钉螺密度显著下降,灭螺效果稳定可靠。更多还原

【Abstract】 Objective To evaluate the long-term molluscicidal effect of suspension concentrate of niclosamide(SCN) spraying in marshland.Methods A dosage of 2 g/m~2 of SCN was sprayed 2~3 times yearly, after 1 w,the molluscicidal effect was evaluated.Results From 2004 to 2010,the average density of living snails was 6.00,4.25,2.04,1.95,0.97,1.35,1.58 snails/0.11m~2,respectively before spraying and 0.86,0.86, 0.23,0.16,0.18,0.22,0.08 snails/0.11m~2,respectively after spraying.The average density of living snails declined gradually in the years.The occurrence rate of frames with living snails declined from 73.46%to 4.33% with a reduction rate of 94.10%),and the average density of living snails reduced from 6.00 snails/0.11m~2 to 0.08 snails/0.11m~2 with a reduction rate of 98.67%.Conclusion After spraying continuously in marshland, the density of living snails declined significantly and the molluscicidal effect was stable and reliable.更多还原