Niclosamide is not easy to absorb orally, maintains a high concentration in the intestines, kills the head and near segments of the aphids, and is clinically used to expel beef aphids, pork aphids and short-shelled aphids, which are more effective than betel nut and pumpkin seeds. It is also used as a molluscicide. It can kill snails and cercariae cercariae and edulis at a concentration of 0.2 to 0.5 parts per million. The dosage is 1 g/m2. This product is harmless to warm-blooded animals and plants, but only to fish. This product can also be used as a coating agent for application to the skin before launching to prevent acute schistosomiasis infection and rice dermatitis. (Niclosamide is included in the WHO Essential Medicines List for use when praziquantel treatment is ineffective)