[Pathogen] belongs to a new species of Myxococcus, which is very similar to the form of Myxococcus mutans. [Disease and Diagnosis] The diseased fish turns milky white from the kiss end to the eyeball, the lips are swollen, and the Zhang Zhang is out of order. Causes difficulty in breathing. The skin around the mouth is festered and floc adheres to it. [Popularity and Hazards] This disease is an fulminant disease, which has a prevalence in different degrees in various areas of fish farming in the Yangtze River and Xijiang River basins in China. The epidemic season of the disease generally begins in late May and peaks in June. It is rare after the middle and late July. Whitehead white beak disease is one of the serious diseases that endanger the species of summer flowers (grass, blue, beak, pupa, pupa, etc.), especially the grass carp. The rapid onset of disease, between the day, can cause thousands of summer fish species to die, serious wild fish in the sick pool and even crickets will be infected and died. [Prevention and Treatment] Prevention: (1) At the first stage of fry stocking, a reasonable stocking density of 225 tails per square meter should be adopted to prevent the occurrence of the disease. (2) Keep the water clean, have adequate and palatable food, and do not apply unfermented manure. (3) Before fry stocking, soak with 2% salt solution for 10 minutes to 15 minutes. Treatment: (1) rhubarb. 2.5 mg / l -3.7 mg / l final concentration of water to Quanchiposa. (2) rhubarb and copper sulfate mixture. Rhubarb 1.0 mg / l -1.5 mg / l, the preparation method as above; Copper sulphate 0.5 mg/l, respectively, into a solution, Quanchiposa. (3) erythromycin. The final concentration of 0.05 mg / l -0.07 mg / l water to the Quanchiposa. (4) Gallnut. With 2 mg The final concentration of -4 mg/L of water is spilled on the whole pool.
Parodontology,Teeth Mold ,Impression Materials ,Impression Tray
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