浅谈鱼苗下塘的技术要点(国外英文资料).doc

浅谈鱼苗下塘的技术要点(国外英文资料) 3 g / M 3 NO2, three chloro isocyanuric acid disinfectant disinfection full pool splash. (6) the pathogens of the disease were Aeromonas hydrophila, Aeromonas hydrophila and other gram negative bacilli. The lesion mainly occurred all-match Zhuang: trunk and abdomen on both sides of the dorsal fin after. The diseased part first appeared near the round erythema, so it was called printing disease. Then, the scales in the middle of the lesion dropped off, and the necrotic epidermis decayed, revealing white dermis, badly decayed and muscle, and even exposing bones and viscera. Prevention methods: comprehensive prevention, to avoid injury to fish. After the disease can be spilled chlorine disinfectant. The fish in the artificial breeding and disease, can apply a 1% Potassium Permanganate solution in lesions. 2. Fungal diseases The pathogen of water mildew is surface fungi, belonging to algae fungi, and its thallus is slender and branching. When fish are injured, it is easy to induce the disease. The surface of the wound or sick fish flake off attached clouds of gray white cottony hairs, loss of appetite, weakness, floating in the water and finally died. The more in the winter and spring season two, eggs and a variety of fish are disease. Prevention methods: be careful of operation of the fish, avoid fish injury, this can effectively reduce the fungal infection; the disease occurs in the pond, the available concentration of 4 g / M 3 salt and 4 g / M 3 little Su Daquan pool splash. 3, parasitic diseases (1) wheel worm disease is caused by vehicle rotifers. The diseased fish are black and thin, with or without appetite, swimming at the side of the pool. When a large number of parasites, gill tissues secrete large amounts of mucus, gill filament white rot, seriously wandering on the edge of the pool, and finally died. The disease is most prevalent in 4-5 months, which is harmful to fry and fingerling. The disease is characterized by high transmission ra