现介绍几种对鱼苗鱼种危害较大的常见病害和敌害的防治方法。 白头白嘴病:主要危害放养1周后的夏花鱼种,病鱼的吻部及头部呈乳白色,该病属急性病,发病迅速,易致鱼苗大批量死亡。其防治可用含有效氯30％的漂白粉全池泼洒1-2次,浓度为1×10~(-6)。 小瓜虫病:在病鱼的鳃部及体表形成“小白 Are introduced to the fish species more harmful to the common diseases and predatory control methods. Whitehead white mouth disease: the main risk stocking 1 week after the summer flower species, sick fish kisses and head was milky white, the disease is acute, the rapid onset, easy to cause large-scale death of fry. Its control available available chlorine 30% bleach Quanchiposa 1-2 times, the concentration of 1 × 10 ~ (-6). Baby melon disease: gills in the diseased fish and body surface form "white