关键词: 日本囊对虾, 氰戊菊酯, 醚菊酯, 急性毒性, Penaeus japonicus, Fenvalerate, Ethofenprox, acute toxity

Abstract: 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 laboratory conditions［water temperature (18.2±0.3) ℃］by the semi-static test method. The mean static acute 24hLC50、48hLC50、72hLC5 0、96hLC50 of Fenvalerate on Penaeus japonicus were 1.52、0.810、0.520、0.310 μg?L-1 respectively. The mean static acute 24hLC50、48hLC50、72hLC50、96hLC50 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 0.0690 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.