鱼烂腮（Fish gills）

鱼烂腮（Fish gills） 鱼烂腮(Fish gills) How to prevent grass carp black gill disease? The main symptoms of grass carp rotten gills disease is disease of fish body color black, the head is the most obvious, slow reaction, Chi Chun, travel alone. Gill filaments punctate hyperemia, inflammation, no end rot, cartilage exposed, with silt. The disease is most prevalent when the water temperature is between 28 and 35 degrees centigrade, and the incidence is high. Grass carp was a major hazard. Prevention method: First, the early stage of the disease, can be used for prevention and treatment of bleaching powder in the food basket hanging around. Bleaching powder (containing effective chlorine 30%), the whole pond over, so that each cubic meter of water containing 1.5 grams of bleaching powder. The correct diagnosis is the premise of fish, prevent fish only can cure the disease of an antidote against the disease, to. In common fish diseases often have many diseases and pathogens, symptoms are similar, the control method is also different, which should be distinguished. The production of gill disease symptoms diagnosis and treatment methods are introduced as follows: First, the bacterial gill rot disease is the pathogenic bacteria of fish, which is called "rotten gill disease"". The main harm of grass carp and herring, above 15 degrees began. In the range of 15 -30 C, the higher the water temperature, the more likely the outbreak is and the shorter the lethal time. Fish disease symptoms: black, transparent window opercular middle part into a erosion often round or irregular, commonly known as the "open window". Increased mucus on gill, swelling of gill filaments, and ischemia of some areas of the gills were pale red or grayish white. Some parts of the blood due to local congestion and purplish red, and even small bleeding point. In severe cases, the gill lamella dies and falls, and the ends of the gill filament are defective and appear in a broom like manner with sundries and exposed cartilage. Microscopic examination of gill filaments without parasites or fungal parasites was diagnosed as Bacterial Gill rot. Treatment: 1 grams of water per cubic meter of water, 1.2-1.5 grams of bleach or 0.5-0.6 grams of bactericidal king or other disinfectants, water disinfection. Taking antibacterial drugs at the same time. Every 100 kilograms of fish every day mixed bait feed 1-2 grams of oxytetracycline or 10-20 grams of sulfanilamide -2, 6- pyrimidine or 50 grams of fishing, feed 3-6 days. Two, the most common parasitic gill disease and is the most serious harm of ergasilus gill disease. The disease is a disease, fish breathing difficulties, restless, in the water layer spin or crazy swim, the caudal fin leaves often appear above the surface, commonly known as "tail sickness", and finally emaciated, suffocation death. A lot of fish gill mucus disease, gill end dilated into a wooden club like pale ivory. Gill at the end of the number of 1-2 mm white maggot like insects, it is also called "gill maggot disease". The main harm of more than two years old grass carp and silver carp, bighead, 4-9, serious when can cause the death of fish disease. Treatment methods: copper sulfate per 1 cubic meters of water (or 0.5 grams of crystal trichlorfon) and ferrous sulfate 0.2 g whole pool sprinkles a good effect. If only the control of Chinese ergasilus gill disease, recommended the use of copper sulfate and ferrous sulfate mixture, because the cost is about 50% lower than dipterex. Disinfection of pond water after insect killing has better control effect. It is necessary to point out that the goods sold in the market are mostly pesticides, no killing effect on the family, with the product specification requirements and copper sulfate, in fact to the family is the effect of copper sulfate, The fishermen do not have to use these insecticides. Three, mixed type of gill rot disease of both bacterial gill disease symptoms, but also can be found at the end of a large number of fish gill disease of the parasitic worm. This situation is mainly due to infection of gills of fishes and parasites, which are caused by secondary infection of pathogens. Treatment method: the treatment method is similar to the bacterial rotten gill disease and the parasitic rotten gill disease. Need to emphasize is: first insecticidal, after sterilization. General requirements for the use of pesticide drugs, one day after the disinfection of the pool water. It is difficult to achieve the purpose of prevention and control when the drugs are used in reverse order. The grass carp black gill disease symptoms and prevention and control technology [pathogeny] Fish pest coccus. The fungus is suitable growth conditions, pH 6.5-7.5 grew well below pH 6 and pH 8 above the growth temperature to 25 degrees; the best growth and virulence is also strong, 33 growth is good, but the virulence receded, the growth slowed down 40 degrees 65 degrees, 5 minutes of death, 4 degrees below the growth. [symptoms and diagnosis] Anatomical observation of disease fish gills, obviously, gray, white or yellow mud visible spots on the surface of the gill piece; gills, gill mucus to end a lot, and often adhesion of mud and debris debris within the central operculum with serious illness in epidermis of the fish by Myxococcus piscicola after infection the transparent window is etched into round or irregular, so it is called "open window". [epidemic and danger] Throughout the country, the breeding area has the disease throughout the year, and every April -10 months is the epidemic season of the disease. Water temperature above 20 degrees began to pop, the most popular water temperature is 28 degrees -35 degrees, water temperature below 15 is rare. The grass, green, bighead carp and other fish can occur, but mainly harm to grass carp, grass carp was the most serious harm. [prevention and treatment] Prevention (1) because the droppings of herbivorous animals are the source of slime bacteria, the fish ponds must use fermented manure. (2) use of slime bacteria in 0. 7% salt water can not survive in the fish pond have weaknesses, nutrients, salt 2%-2.5% aqueous solution, to fish pickled 10 minutes -20 minutes, can effectively prevent the disease. Treatment (1) rhubarb ammonia water extract. With 2.5 mg / L -3.7% mg / L concentration of water to the pool splashing. (2) erythromycin. With 0.05 mg / L -0.07 mg / L concentration of water to the pool splashing. (3) fish clothing Kang A type. For oral use, 200 grams -250 grams per 100 kg fish body, mixed feeding, 1 days, 1 times, 3 days. (4) fish clothing Kang B-I type. For oral use, 100 grams per 100 kilograms of fish, mixed feeding, 1 days, 1 times, 3 days. How to prevent fish rotten gills disease? At 20:02 on Monday, 08 October, 2009, the disease was caused by the genus coccus of the genus Rhodococcus, which is also considered to be a cylindrical strain of 24. The main symptoms: early onset, gill white rot, sludge and mucus are usually attached on the gills of fish, serious opercular epidermis often corrosion piece, from the outward looking like a transparent window. Sick fish often swim, swim alone, slow, dark, slim. The disease started in the spring when the water temperature was above 15 degrees celsius, Water temperature in the range of 15-30 degrees, the higher the water temperature, easy to break out of the epidemic. Prevention method: 1, put the fish in the pond disinfection thoroughly. Lime, one volume per 667 square meters of water, 60-75 kg, dry cleaning; or one volume per 667 square meters of water, 125-150 kg, pond with water disinfection. Or with 28% chlorinated lime (bleach), one volume per 667 square meters of water, the water will be discharged to 5-10 kg, 5-10 cm, dry cleaning; or one volume per 667 square meters of water, 13.5 kg, pond with water disinfection. 2, preventive medication prescription: 8% BROMOCHLOROHYDANTOIN, one volume per 1 cubic meters of water, 0.2-0.3 grams, disease epidemic season, full pool splash, 1 or 15 days; 10% povidone iodine solution, one volume per 1 cubic meters of water, 0.5-1 ml, disease epidemic season, full pool splash, 1 or 15 days; oxytetracycline hydrochloride, once, every 1 kilograms of fish weight, 30-50 mg, were added into feed, 1 day 1 times, 3-5 days. 3, treatment prescriptions: norfloxacin or ofloxacin, one volume every 1 kilograms of fish weight, 10-30 mg, were added into feed, 1 day 1 times for 3-5 days; or florfenicol or thiamphenicol, one volume every 1 kilograms of fish weight, 5-15 mg, were added into feed 1 days, 1 days, even with 3-5; or SMZ-TMP, one volume every 1 kilograms of fish weight, 50 mg were added into feed, 1 day 1 times, once every 5 days for the first time, doubling the amount of.