1, physical snail control, including snail control in dry river bed, spreading snail-free soil in river, eradicating snail soil, filling old river to open new river, blocking caves, sealing stone cracks), dismantling and repairing water wharf, catching residual snails, etc.
2, chemical snail control, chemical fly control is drug snail control. Commonly used molluscicide drugs include sodium pentachlorophenol, lime nitrogen (calcium cyanamide), chloroacetamide, niclosamide (schistosomiasis control -67), nicotinamide (molluscicide), urea, tea cake and so on.
Niclosamide is a good molluscicide approved by the World Health Organization. As it is insoluble in water, the prepared ethanolamine salt can be soluble in water, and the snail killing concentration of 0.3 mg/L can kill the adult tapeworm.
3. Biological snail control, which is to use natural enemies or other organisms of snails to directly kill snails or destroy their population balance to achieve the purpose of snail control.
Extended data
Active eradication of Oncomelania hupensis the most fundamental measure to prevent schistosomiasis infection, and Oncomelania hupensis the only intermediate host of schistosomiasis. When people and animals come into contact with water containing Schistosoma cercariae, cercariae will quickly enter people and animals, and after about 37 days, it will develop into adult Schistosoma japonicum, parasitic in mesenteric blood vessels, and feed on blood to maintain life.
Patients with schistosomiasis may have no symptoms in the early stage, and may also have symptoms such as abdominal pain, diarrhea, bloody stool and fatigue. If it is not checked and treated in time, it will gradually form chronic advanced schistosomiasis, ascites, hepatosplenomegaly, belly as big as a drum, and some will vomit blood, which will seriously affect labor production and life, and even endanger life.
References:
Baidu Encyclopedia-Kill Oncomelania hupensis
References:
China Center for Disease Control and Prevention-Questions and Answers on Schistosomiasis Control Knowledge