Control methods of common diseases of crucian carp

Crucian carp is mainly cultivated in the middle and lower reaches of the Yangtze River in China. In recent years, with the economic progress, the market of Crucian carp has gradually opened up, followed by the increase of breeding density and area, excessive use of antibiotics and other agents, and the incidence of Crucian carp diseases has become higher and higher. The infection rate after the disease is extremely fast, and the mortality rate is relatively high, which affects the income of farmers. So what are the main diseases of crucian carp? The pro-farming network brings you common disease prevention methods for crucian carp, and we will understand them together.

1. Water mold

Water mold is caused by fungi parasitism on the surface of crucian carp. When the water temperature is 10-15 degrees, the spores of fungi are easy to reproduce, and then the cultivation density is too high. When crucian carp swims or other reasons cause surface abrasion, then the fungi wait for the opportunity to attach to the wound site, germinate and parasitize, and gradually spread with reproduction, resulting in mold appearing on the surface of other crucian carp. Finally, the fish swims abnormally, loses appetite, and dies weakly.

Prevention and control methods: mainly occurred in the spring low temperature period, control the breeding density, regular disinfection treatment, strengthen water quality management, prevent excessive fertilizer water.

2. Bleeding disease

Hemorrhagic disease mainly occurs in poor water quality management, resulting in deterioration of water quality environment, especially in highly dense breeding environment is extremely frequent, the onset of violence, rapid infection, high mortality. Crucian carp eyes, mouth, fins and other different parts of the disease congestion, bleeding, internal organs will also bleed swollen.

Prevention and treatment methods: regular disinfection, injection of new water, sprinkling water quality improver, strengthen water quality management, when the disease with 2-3 tablets of virus spirit crushed mixed feeding, feeding with 1 gram of blood per 5kg, continuous one week can be cured.

3. Hepatobiliary syndrome

Hepatobiliary syndrome is a more prevalent disease caused by the increase of breeding density in recent years. In order to reduce breeding costs, many farmers do not pay attention to water quality when breeding, and feed is relatively single, resulting in malnutrition and disease. When the disease occurs, the tail tip and fin tip of the crucian carp appear swollen and discolored symptoms.

Prevention and control methods: strengthen water quality management at ordinary times, disinfect water with bleaching powder or chlorine dioxide regularly, improve feed formula, balance and match, and improve nutrition required for crucian carp growth.

4. Red gills

Red gills mainly occurs in the period of higher temperature, when the water temperature is about 20-26 degrees, when the disease occurs, the crucian carp is still 5-10 cm away from the water surface, and when it is afraid of hitting with things, it will droop, but after a while it will remain still. In addition, the fish is black and thin, and the gills are red and swollen.

Prevention and control methods: must pay attention to disinfection measures when clearing the pond, pay attention to control the water quality when breeding, feed carbohydrates should not exceed 40%, after the disease can be used to sprinkle strontium perchlorate treatment of the pond.

The above is the common disease prevention and control methods of crucian carp brought to you by the pro-agricultural network. From the above contents, it can be seen that the disease causes of crucian carp are mainly water quality problems and breeding density problems. Farmers must pay attention to two points when breeding to ensure the disease-free growth of crucian carp.