Zheng Sheng-bang, Zhou Yi-biao, Li Lin-han, Wu Jin-yi, Yao Bao-dong, Zhu Shao-ping, Wei Cheng-jian, Li Fu-ping, Hu Ben-jiao, Ren Guang-hui, Yi Ping, Jiang Qing-wu
Department of Epidemiology, School of Public Health, Fudan University, Ministry of Education, Tropical Disease Research Center, Fudan University, Shanghai 200032, China.
Anxiang Office of Leading Group for Schistosomiasis Control, China.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi. 2013 Aug;25(4):357-61.
To evaluate the short-term effect of the black film covering combined with niclosamide on Oncomelania hupensis snail control in marshland and lake regions.
A ditch with snails in Anxiang County was selected as the experimental sites. The ditch was divided into 3 groups: a film group, a niclosamide group, and a niclosamide and film group. The snails were surveyed before the test and 1, 3, 5, 7 days after the experiment.
After the film covering, the highest temperature of the surface of soil was 63.7 degrees C on the first day, and the temperature higher than 40 degrees C lasted 4.34 hours. On the second day, the highest temperature was 52.3 degrees C, and the temperature higher than 40 degrees C lasted 4.96 hours. On the fourth day and fifth day, the temperature was lower than 30 degrees C, while the temperature was lower than 34 degrees C on the sixth day. On the seventh day of the experiment, the snail death rates of the film group, the niclosamide group, and the niclosamide and film group on the soil surface were 16.36%, 58.40% and 53.57%, respectively. On the seventh day, the snail death rates of the film group, and the niclosamide and film group under the soil were 20.00% and 40.00%, respectively, while no snails were found under the soil in the niclosamide group 3 days after the experiment. In mesh bags, the snail death rates of the film group, the niclosamide group, and the niclosamide and film group were 84.00%, 95.33% and 95.33%, respectively.
The short-term effect of the black film covering on snail control is not obvious, and the black film covering does no promote the molluscicidal effect of niclosamide.
评估黑膜覆盖联合氯硝柳胺对江湖地区钉螺控制的短期效果。
选取安乡县一条有螺沟渠作为实验地点。该沟渠分为3组：薄膜组、氯硝柳胺组、氯硝柳胺与薄膜组。在试验前及试验后1、3、5、7天对钉螺进行调查。
覆膜后，第一天土壤表面最高温度为63.7℃，高于40℃的温度持续4.34小时。第二天，最高温度为52.3℃，高于40℃的温度持续4.96小时。第四天和第五天，温度低于30℃，而第六天温度低于34℃。在实验的第七天，薄膜组、氯硝柳胺组和氯硝柳胺与薄膜组在土壤表面的钉螺死亡率分别为16.36%、58.40%和53.57%。第七天，薄膜组和氯硝柳胺与薄膜组在土壤下的钉螺死亡率分别为20.00%和40.00%，而氯硝柳胺组在实验3天后在土壤下未发现钉螺。在网袋中，薄膜组、氯硝柳胺组和氯硝柳胺与薄膜组的钉螺死亡率分别为84.00%、95.33%和95.33%。
黑膜覆盖对钉螺控制的短期效果不明显，且黑膜覆盖不能促进氯硝柳胺的杀螺效果。
