Acute toxicity tests of three antiparasitic drugs to juvenile snail of Babylonia areolata

The acute toxicities of trichlorfon, cypermethrin and avermectins to juvenile snail of Babylonia areolata were studied with method of semistatic water. The results show that the 24 h LC50s of trichlorfon, cypermethrin and avermectins were 210.54 mgL-1, 32.52 mgL-1 and 8.13 mgL-1, respectively, while 48 h LC50s were 93.52 mgL-1, 16.90 mgL-1 and 3.96 mgL-1, respectively. The order of lethality was trichlorfoncypermethrinavermectins, and their safe concentrations (SC) to juvenile snail of B.areolata were 5.54 mgL-1, 1.37 mgL-1 and 0.28 mgL-1, respectively. It is concluded that they all can be used in the culture of B.areolata, but considering environmental impact and drug residues, they should not be abused in practical application.