3种抗寄生虫药对方斑东风螺稚螺的急性毒性试验

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

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>氯氰菊酯>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。

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.