氰戊菊酯、醚菊酯对日本囊对虾的急性毒性

Acute toxicity of Fenvalerate and Ethofenprox on Penaeus japonicus

为了研究两种拟除虫菊酯类农药对日本囊对虾(Penaeus japonicus)的急性毒性效应,采用半静态换水补药方法研究了氰戊菊酯和醚菊酯对平均体重(10.6±2.5)g日本囊对虾的急性毒性。试验结果表明:在水温(18.2±0.3)℃时,氰戊菊酯对日本囊对虾的24 h LC50、48 h LC50、72 h LC50、96 h LC50分别为1.52、0.810、0.520、0.310μg·L-1,安全浓度为0.069 0μg·L-1;醚菊酯对日本囊对虾的24 h LC50、48 h LC50、72 h LC50、96 h LC50分别为1.88、1.30、0.940、0.760μg·L-1,安全浓度为0.190μg·L-1。两种农药均属于极高毒药物,对日本囊对虾的毒性大小为:氰戊菊酯>醚菊酯。因此在作为清塘药物进行清塘时需特别谨慎使用。

To study the acute toxic effects of two pyrethroid insecticides on Penaeus japonicus, the acute toxicity of Fenvalerate and Ethofenprox on Penaeus japonicus [ weight （ 10. 6 ± 2. 5 ） g ] was studied under labo- ratory conditions [ water temperature （ 18.2 ±0. 3 ） ℃ ] by the semi - static test method. The mean static a- cute 24 h LC50, 48 h LC50, 72 h LC50, 96 h LC50of Fenvalerate on Penaeusjaponicus were 1.52, 0. 810, 0. 520, 0. 310 μg . L-1 , respectively. The mean static acute 24 h LC50, 48 h LC50, 72 h LCso, 96 h LC50 of Ethofenprox on Penaeus japonicus were 1.88, 1.30, 0. 940, 0. 760 μg . L-1, respectively. The safe concentration （SC） of Fenvalerate and Ethofenprox were 0. 069 0 μg . L-1 and 0. 190 μg . L-1- The results showed that the order from strong to weak of acute toxicity of two pyrethroid insecticides which were belonged to the high - toxic substance on Penaeus japonicus was Fenvalerate 〉 Ethofenprox. As a pond clearing drug, it should be carefully used.