Prevention and treatment of acne disease of crucian carp in cultured crucian carp

In recent years, crucian carp culture is the main species in our region, and the incidence of crucian carp is getting higher and higher. Crucian carp pox disease, which hardly occurred in the past, now occurs from time to time. The disease generally occurs after the end of autumn, and rarely causes fish death, but seriously affects the commercial value of crucian carp.

The symptoms of crucian carp acne disease are as follows: milky white spots appear on the body surface of early diseased fish, and are covered with a thin layer of white mucus. With the development of the disease, the size and number of white spots gradually increase and expand, resulting in the spread of the whole body. As the epidermis of the diseased part is stimulated by some kind of stimulation, it thickens and forms a proliferative organism, which can be 1mm higher than the surface of the fish and cannot be knocked off by friction. It is currently considered to be a viral disease.

The prevention methods of crucian carp acne disease are as follows: (1) clean the pond strictly and thoroughly with quicklime; (2) strictly check the seedlings to put an end to the fish species purchased in the affected area; (3) keep sufficient dissolved oxygen in the breeding pond; (4) sprinkle disinfectants on the whole pond regularly; (5) adjust the culture structure and do not raise crucian carp and carp temporarily.

Treatment of crucian carp acne disease: on the first day, use quaternary amine salt (commercial drugs such as antibacterials, high-efficiency quaternary ammonium salts), the dosage is the description of the dosage, sprinkle the whole pool; on the second day, use quaternary amine salts to complex iodine (commercial drugs such as iodophor, etc.), the dosage is 50% higher than the stated dosage, sprinkle in the whole pool. In this way, the proliferation of most diseased fish can fall off, thus restoring the commercial value of diseased fish.

In short, there is far from a complete cure for the disease. The author believes that prevention should be given priority to, and the pond where the disease occurred last year had better change its culture structure, with grass carp, herring, carp and so on as the main culture species. Because these fish are generally not infected with the disease. For the ponds where the disease occurred last year, the fish should be checked frequently after September. If you start to develop the disease, you should treat or clear the pond as soon as possible to reduce economic losses.