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目的为寻求更理想的灭螺药物,给我国血吸虫病现场防治提供钉螺控制新技术。方法在使用螺威和氯硝柳胺灭螺过程中做毒鱼对照试验,以了解2种药物对4种鱼类的毒性。结果施药5 min后,对照组(氯硝柳胺)鱼开始跳跃,20 min后开始有多条鱼反应强烈,30 min后发现有一些鳝鱼和泥鳅死亡;同期实验组(螺威)和空白组水面未见明显变化。24 h内鲫鱼和鲤鱼死亡:实验组5条、对照组40条、空白组0条。15 d后鲫鱼和鲤鱼死亡率:实验组67.50%、对照组100.00%、空白组7.50%。结论螺威对鱼类的毒性比氯硝柳胺弱,且毒性发作的速度比后者慢。
The purpose is to find more ideal medicine for snail control and to provide new snail control technology for on-the-spot prevention and control of schistosomiasis in our country. Methods In the use of snail and niclosamide snail molluscum do control experiments to understand the two kinds of drugs on the four kinds of fish toxicity. Results In the control group (niclosamide), the fish began to jump after 5 min of application, and many fish started to react strongly after 20 min. After 30 min, some eel and loach were found dead. In the same experimental group No significant change in the water level in the blank group. Crucian carp and carp died within 24 h: 5 in the experimental group, 40 in the control group and 0 in the blank group. After 15 days, the mortality of carp and carp was 67.50% in the experimental group, 100.00% in the control group and 7.50% in the blank group. Conclusion The toxicity of snails to fish is weaker than that of niclosamide, and the toxicity is slower than the latter.