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2.鲢中华鳋病(1)症状:雌虫用大钩钩在花、白鲢的鳃丝和鳃耙上,对鱼危害与大中华鳋相似。鱼整天在水体表层打转或狂游,尾鳍上叶往往露出水面,称“翘尾病”。(2)流行情况:4～11月份,6月中旬至7月下旬最为严重。(3)防治方法:同大中华鳋病。3.锚头鳋病(针虫病、铁锚虫病)(1)症状:发
2, silver carp, fistula (1) Symptoms: females with hooks in the flower, silver carp gill filaments and gill rakers, the harm of fish is similar to Greater China. Fish swirling or swimming all day in the surface of the water, caudal leaves often reveal the surface, called “end of the disease.” (2) prevalence: April to November, mid-June to late July the most serious. (3) prevention and treatment methods: the same with the large Chinese Hysteria disease. 3. Anchorage disease (echinococcosis, iron anchor disease) (1) Symptoms: hair