Control of melon disease in cultured Pelteobagrus fulvidraco

The main results are as follows: (1) the pathogen has many children.

(2) the symptoms are on the skin, fins and gills of diseased fish, white dot cysts can be seen with the naked eye, and in severe cases, the body surface seems to be covered with a white film. Diseased fish are slow to react or float on the surface. Due to the infection of bacteria in the focus, the body surface of the fish was inflamed, or local necrosis, scale shedding, oblique cleft of fin, proliferation of Gill epithelium, Gill death due to dyskinesia and dyspnea.

(3) epidemic and harmful melons parasitize on the Gill and body surface of Pelteobagrus fulvidraco. The suitable breeding water temperature for Pelteobagrus fulvidraco to Pelteobagrus fulvidraco is 1525 ℃, pH6.5~8, which is rare in summer. When excessive close breeding, insufficient bait. When the fish is thin, it is especially easy to be infected by melon insects.

(4) Prevention and control methods

① adopts quicklime pond cleaning, fish seed disinfection, reasonable stocking and other production measures to prevent the spread of melon disease.

② soaked diseased fish with formaldehyde 60mg / L for 10min (depending on the water temperature), soaked once again every other day, and then raised in the pool. The original pool was thoroughly disinfected with formaldehyde. This method is effective only in the early stage of the disease, such as the examination is found late, the diseased fish is covered with small white spots, even if continuous medication, the loss of seedlings is also very large.