Chines Journal of Vector Biology and Control ›› 2014, Vol. 25 ›› Issue (2): 152-155.DOI: 10.11853/j.issn.1003.4692.2014.02.017

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Effects of film mulching on Oncomelania hupensis breedingin different soil layers

ZHU Hongqing1, ZHONG Bo2, ZHANG Guirong3, CAO Chunli1, JIA Bin3, LI Jianguo3, FU Tao3, TANG Shugui4, LU Ding2, BAO Ziping1, LI Shizhu1, ZHANG Xudong2, XU Fasen2, GUO Jiagang1   

  1. 1 National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Center for Malaria, Schistosomiasis and Filariasis, Shanghai 200025, China;
    2 Institute of Parasitic Diseases, Sichuan Center for Disease Control and Prevention;
    3 Pengzhou Station of Schistosomiasis Control;
    4 Chengdu Center for Disease Control and Prevention
  • Received:2013-11-21 Online:2014-04-20 Published:2014-04-20

地膜覆盖对不同土层的湖北钉螺影响观察

祝红庆1, 钟波2, 张贵荣3, 曹淳力1, 贾彬3, 李建国3, 付涛3, 唐书贵4, 陆定2, 鲍子平1, 李石柱1, 张旭东2, 许发森2, 郭家钢1   

  1. 1 中国疾病预防控制中心寄生虫病预防控制所, 卫生部寄生虫病原与媒介生物学重点实验室, 世界卫生组织疟疾、血吸虫病和丝虫病合作中心, 上海 200025;
    2 四川省疾病预防控制中心寄生虫病预防控制所;3 四川省彭州市血吸虫病防治站;
    4 成都市疾病预防控制中心
  • 作者简介:祝红庆, 男, 副主任技师, 从事流行病学与血吸虫病防治研究。Email: zhu.hq@163.com

Abstract: Objective To study the effects of film mulching on Oncomelania hupensis and its eggs in soil. Methods The damp ridges with O. hupensis snails were selected and divided into niclosamide/film mulching group (sprayed with 50% wettable powder of niclosamide ethanolamine salt at 2 g/m2 and covered with mulch), film mulching group (covered with mulch without niclosamide spraying), and control group (not treated by molluscicidal measures). Snail investigation was conducted in different soil layers (0, 0-2, 2-5, 5-10, and 10-15 cm) at 40 d after niclosamide spraying plus film mulching and at 90 d after film mulching alone. Results At 40 d and 90 d after film mulching, the snail distribution in soil changed, increasing by degrees from soil surface to the deep layer of soil (R2=0.9877; R2=0.7619); compared with those of control group, the mortality of snails in soil was significantly higher (χ2=281.198, P<0.001; χ2=47.970, P<0.001), the average density of living snails was significantly decreased (Z=-6.390, P<0.001; Z=-4.681, P<0.001), and the number of young snails was lower (Z=-6.733, P<0.001; Z=-5.131, P<0.001). Conclusion Film mulching is effective in killing snails in soil and can control the reproduction and breeding of the second generation of snails.

Key words: Schistosomiasis, Oncomelania hupensis, Mulch, Niclosamide, Reproduction, Distribution

摘要: 目的 观察农用地膜覆盖灭螺对土内钉螺和螺卵的影响。方法 选择潮湿的有螺田埂作为试验现场, 分设施药覆膜组(采用50%氯硝柳胺乙醇胺盐可湿性粉剂, 按2 g/m2的剂量喷洒后覆盖地膜)、单纯覆膜组(不施药直接覆盖地膜)和对照组(不采取任何灭螺措施)。于施药覆膜后40 d和单纯覆膜后90 d分别对试验环境0、0~2、2~5、5~10和10~15 cm的土层进行钉螺调查。结果 覆膜40 d和90 d后, 钉螺在土内分布的特点发生了改变, 钉螺由土表向土内深层呈逐渐递增趋势(R2=0.9877, R2=0.7619), 土内钉螺死亡率高于对照组(χ2=281.198, P<0.001;χ2=47.970, P<0.001), 活螺平均密度较对照组均有下降(Z=-6.390, P<0.001;Z=-4.681, P<0.001), 幼螺的数量明显低于对照组(Z=-6.733, P<0.001;Z=-5.131, P<0.001)。结论 地膜覆盖对土内钉螺有很好的杀灭作用, 并且可抑制钉螺第2代的繁殖和孳生。

关键词: 血吸虫病, 钉螺, 农用地膜, 氯硝柳胺, 繁殖, 分布

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