鱼的寄生虫病是鱼病中除细菌性疾病以外最常见的鱼病,甚至有过之而无不及,其死亡率一般虽不高,但发病率高,影响鱼类的生长,因此,也常常给渔业生产造成严重的经济损失。同其他鱼病相比,鱼的寄生虫病的防治难度大。这一方面是因为鱼塘杀虫是立体杀虫,而非象对农作物那样只需进行表面杀虫即可;另 Parasitic diseases of fish are the most common fish diseases except bacterial diseases in fish diseases, and even worse, the mortality rate is generally not high, but the incidence is high, which affects the growth of fish. Therefore, Often causes serious economic losses to fishery production. Compared with other fish diseases, fish parasite disease prevention and treatment difficult. This is because the fishpond insecticide is a three-dimensional insecticide on the one hand, not just like the crop as the surface insecticide can be; the other