White manure disease is often manifested as feeding prawns normally at the initial stage, then slowly eating or even not feeding, and then discharging slender, white and sticky feces, attaching to the material platform or floating on the water surface, gathering a lot of stench. After incision, the upper mucosa of the intestine fell off and the lower mucosa proliferated and edematous. In severe cases, the jejunum and liver atrophy or swell or necrosis. The main components of "white stool" are the pathological tissue discharged from the liver, the mucosa shed from the intestine and a small amount of normal feces.

The cause of white stool disease 1. Weather difference

? The difference between the north and the south, according to friends from farmers in different regions, there is less white manure in the process of shrimp farming in the north at present. However, farmers in the south report that white manure disease has begun to appear generally in the south. In the final analysis, it is caused by the difference in weather. Rainy days are more common in southern China, especially in this season. As we all know, a rain is enough for shrimp farming, not to mention a long rainy day.

Second, frying.

At present, the fry problem is the biggest hidden danger of shrimp culture. According to the master who has many years of experience in shrimp farming, the quality of fry is uneven now. On the surface, it is a pure shrimp seedling of a big company? Quality is guaranteed. Who can guarantee that they are selling dog meat with sheep's heads hanging? For farmers, it is recommended to use shrimp seedlings with stable and reliable quality to ensure the stable production of shrimp.

Three. Water quality, sediment and biological factors of aquaculture water.

Friends engaged in aquaculture know that water is the best and most important place to raise prawns. Then let's introduce the factors that cause white stool disease from the following aspects:

1, bacterial infection

A large number of harmful pathogens such as Vibrio parahaemolyticus, Vibrio harveyi and Vibrio vulnificus attach to some feed, residual bait and dead algae at the bottom of the pond. When prawns eat, these bacteria are ingested into the body with food, and continue to multiply and grow, leading to gastrointestinal infection, atrophy of hepatopancreas, reduced or no consumption of prawns, and gradually white stool.

2, harmful algae outbreak

At present, harmful algae such as cyanobacteria are easy to erupt, and a large number of microcystins are formed after algae inversion. These harmful algae are ingested by prawns, leading to poisoning, and the liver causes hepatopancreatic and intestinal diseases of prawns, resulting in white feces.

Prevention of white manure disease of shrimp 1 and attention to feeding situation.

Be sure to pay attention to the feeding situation of prawns, and be alert to the disease if you eat less or even no food. Among them, the feeding platform is essential, and the feeding situation of shrimp is mainly reflected by the feeding platform. Therefore, in the process of feeding, we must pay close attention to the situation of the feeding platform.

2, protect the intestinal hepatopancreatic environment

To prevent white manure, feed is mixed with high-quality lactic acid bacteria for intestinal health care in the process of breeding. At the same time, Chinese herbal medicines and probiotics can be taken regularly to protect the health of the liver and pancreas. At present, there are two products on the market: oral nutrition and liver protection. One is a biological preparation containing microorganisms, and the other is traditional Chinese medicine technology. These two products are green and safe, so you can use them with confidence. ?

3, water disinfection

? Disinfection treatment, it is recommended that you use more than 40% potassium persulfate to disinfect continuously for 2 days, and then disinfect again 24 hours after the first disinfection. At present, most disinfectants on the market are iodine, strong chlorine essence and chlorine dioxide. These three products are greatly affected by the organic matter content in the pond, and the quality level of iodine is uneven, which can not achieve good disinfection effect. However, strong chlorine dioxide needs 20ppm in the case of rich organic matter, which not only kills Vibrio, but also kills our cultured varieties. At the same time, chlorine dioxide and strong chlorine will also produce a lot of residual chlorine. Many varieties we breed have great side effects, which are easy to cause chlorine poisoning, and more than 40% of potassium persulfate will not be affected by the concentration of organic matter and will not produce toxic and harmful substances such as residual chlorine, so the disinfection effect is good.

4, processing bottom material

There are many kinds of reformed products. The latest technology in the market is safe and efficient potassium persulfate double salt for negative film. Potassium bisulfate is known as the fifth generation disinfectant, which is green and safe, has little stimulation to cultured animals and no residue when used, and is now recognized by more and more farmers. However, when selecting potassium persulfate double salt to replace the negative film, potassium persulfate with content above 20% should be selected.

5. Feed management

Pay attention to the preservation of feed, never use inferior feed, and never use moldy expired feed. Feed is no small matter, don't ruin your hard work in order to save costs.