3种抗寄生虫药对方斑东风螺稚螺的急性毒性试验

采用半静水试验法,研究了敌百虫、氯氰菊酯和阿维菌素等3种抗寄生虫药物对方斑东风螺（Babylonia areolata）稚螺的急性毒性。结果表明,敌百虫、氯氰菊酯和阿维菌素对方斑东风螺稚螺24 h半致死质量浓度（LC50）分别为210.54 mg·L^-1、32.52 mg·L^-1和8.13 mg·L^-1;48h LC50分别为93.52 mg·L^-1、16.90 mg·L^-1和3.96 mg·L^-1;毒性大小依次为敌百虫＆gt;氯氰菊酯＆gt;阿维菌素,安全质量浓度（SC）分别为5.54 mg·L^-1、1.37 mg·L^-1和0.28 mg·L^-1。在上述安全质量浓度范围内,这些药物均可杀灭桡足类或其他寄生虫,但考虑药物残留和对水环境的污染,在生产中尽量采用生态防治办法,避免使用药物。

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 LC50 ＇s of trichlorfon,cypermethrin and avermectins were 210. 54 mg·L ^- 1 , 32. 52 mg·L^ - 1 and 8. 13 mg·L^ - 1 ,respectively,while 48 h LC50 ＇s were 93. 52 mg·L ^- 1 ,16. 90 mg·L^ - 1 and 3. 96 mg·L ^- 1 ,respec-tively. The order of lethality was trichlorfon ﹥ cypermethrin ﹥ avermectins,and their safe concentrations（SC）to juvenile snails of B. areolata were 5. 54 mg·L^ - 1 ,1. 37 mg·L^ - 1 and 0. 28 mg·L ^- 1 ,respectively. It is concluded that they all can be used in breeding of B. areolata,but considering environmental impact and drug residues,they should not be abused in practical application.