Causes and Treatment Methods of White Spot Disease in Crayfish

In recent years, the market price of crayfish has been quite decent. It is understood that in 2017 the price of crayfish rose to 40 yuan per jin, and in 2018 the price trend was stable, remaining at around 20-30 yuan per jin. This has attracted many novice farmers to raise crayfish to make money. The most common disease that occurs during crayfish farming is white spot disease, so what are the causes of white spot disease in crayfish? How is it treated properly? An introduction is given below:

I. Introduction to white spot disease in crayfish

1. Symptoms of white spot disease in crayfish

Crayfish are too weak to climb onto the grass, their activity decreases, their feeding decreases, fluid accumulates in their bodies, the head carapace is easily peeled off, the hepatopancreas turns white, and the mortality rate rises rapidly. The appearance of these related symptoms indicates that the crayfish have already contracted white spot disease.

2. Time of onset of white spot disease in crayfish

White spot disease in crayfish usually occurs in May each year, and this period is the outbreak period of white spot disease in crayfish. It is mainly caused by the rotting of aquatic plants, abnormal weather, deterioration of the bottom sediment, and excessive density.

II. What are the causes of white spot disease in crayfish?

1. The first cause of white spot disease in crayfish is that too many crayfish are kept in the pond and pond division was not carried out in time;

2. The second cause of white spot disease in crayfish is that feed is given too late and in insufficient quantity;

3. The third cause of white spot disease in crayfish is the stocking of juvenile crayfish during the disease season and non-standard harvesting and transport;

4. The fourth cause of white spot disease in crayfish is that seedlings are stocked in the same pond for too long a time, especially when only a small amount of supplementary stock is added to the breeding pond; 5. The fifth cause of white spot disease in crayfish is that the aquatic plants in the pond are planted in a non-standard way and the water quality is turbid;

6. The sixth cause of white spot disease in crayfish is harvesting with small-mesh ground cages, after which the small crayfish are returned to the pond after sorting;

7. The seventh cause of white spot disease in crayfish is that stress response is one of the important causes of disease.

The above 7 points are the main causes of white spot disease in crayfish.

III. How is white spot disease in crayfish best treated?

1. Promptly splash quicklime or monocalcium phosphate to improve water quality;

2. Promptly change the water or flush water into the shrimp ditch to buffer the deterioration of water quality;

3. Mix allicin or antibacterial drugs into the feed to treat white spot disease in crayfish;

4. Go to an agricultural supply store to consult the staff, or consult an experienced crayfish farming expert, to see what medication can be purchased to treat the symptoms of white spot disease.

The above 4 points are an introduction to the treatment methods for white spot disease in crayfish.

IV. What are the prevention and control measures for white spot disease in crayfish?

1. Thoroughly clean and disinfect the pond every year, with iodine preparations being the most ideal;

2. Stock healthy, high-quality seedlings and control the stocking density;

3. Feed concentrated feed earlier to improve the disease resistance of the crayfish;

4. Regulate the farming water quality well and regularly splash chlorine preparations or microbial preparations;

5. Transplant and cultivate aquatic plants well to improve the bottom sediment of the breeding pond.

The above 5 points are an introduction to the preventive measures for white spot disease in crayfish.

Summary: The above content is an introduction by the Tuliu.com editor on the causes and treatment methods of white spot disease in crayfish, and it is hoped that it can help farmers in need. This article is compiled from the Internet.