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本尼登虫是对海水网箱养殖大黄鱼危害最大的寄生虫之一。本实验采用十二种渔用杀虫剂对大黄鱼进行急性毒性实验。结果表明:水温26℃时,处理90min,大黄鱼的半数死亡浓度(LC50)分别是:甲醛500×10-6、氨水200×10-6、过氧化氢1200×10-6、硝酸铵3.5×10-6、敌百虫0.5×10-6、36%醋酸100×10-6、高锰酸钾8×10-6、盐60‰、水烟浸出液290×10-6。对自然感染本尼登虫的大黄鱼进行药浴试验,杀虫效果较好的有:过氧化氢、高浓度盐水、高锰酸钾。
Bennigans is one of the most harmful parasites to marine cages for breeding large yellow croaker. In this experiment, 12 kinds of fishing insecticides were used to test the acute toxicity of large yellow croaker. The results showed that the LC50 values of big yellow croaker were as follows: formaldehyde 500 × 10-6, ammonia 200 × 10-6, hydrogen peroxide 1200 × 10-6, ammonium nitrate 3.5 × 10-6, trichlorfon 0.5 × 10-6, 36% acetic acid 100 × 10-6, potassium permanganate 8 × 10-6, salt 60 ‰, hookah leachate 290 × 10-6. On the natural infection Benny Deng large yellow croaker medicated bath test, insecticidal effect is better: hydrogen peroxide, high concentrations of salt water, potassium permanganate.