How to prevent vibriosis in cultured shrimp.

Special attention should be paid to the development and transformation of hepatopancreas of white shrimp before 1 and 30-40 days before. Liver transformation is smooth, liver function is complete, shrimp immunity is good, and Vibrio is not easy to infect. This is one of the reasons why shrimp may not get sick even if there is a small amount of Vibrio in the pool water.

2. When the initial symptoms of Vibrio infection are found, such as liver red, stomach red, intestine red, beard red, tail red, leg red and leg yellow, and deep spots appear on shrimp, em bacteria from Wangnong aquatic products should be sprayed in time to protect the liver and intestines, kill Vibrio in hepatopancreas and stomach, and avoid further infection.

3. Pay attention to carefully observe the hepatopancreas, stomach and shrimp. Once the feeding situation is abnormal, the number of Vibrio in water and shrimp should be checked in time and measures should be taken immediately (don't wait for the result of Vibrio detection before taking measures, which will often delay the treatment time). After we used the following scheme, the symptoms of Vibrio infection gradually disappeared and the shrimp ate normally.

A, using Wangnong Aquatic Products 10kg/ mu em bacterial liquid to disinfect the bottom of the pond at night to control the number of vibrios in the bottom of the pond;

B. In the sunny morning, use 2 bags of "Gan Li Dan Kang San"+1 bottle of "Herbal Plaster" and splash 2 mu of water to protect the liver and promote the recovery of swollen hepatopancreas. If the situation is serious, the hepatopancreas will be normal after 2 days, and the effect is obvious;

C, in the afternoon, feed a meal with em bacteria solution of Haowangnong Aquatic Products mixed with 80 kg of feed, and use it continuously for a period of time to kill Vibrio in the stomach, liver and pancreas, and relieve the symptoms of gastrointestinal swelling after use;

We remind farmers to pay attention to the concept of improving the bottom of the pool. General farmers think that it is unnecessary to change the bottom 20 days before seedling release 15. This needs to be used flexibly according to the weather and algae phase. If the weather is much hotter before May this year, the algae phase is changeable, the aging time of algae is accelerated, and too many dead algae are accumulated at the bottom of the pool, it will easily become a hotbed for Vibrio reproduction. We suggest that farmers regularly use em bacteria from Wangnong Aquatic Products to spray and decompose the dead algae and manure at the bottom of the pond, and flexibly change the bottom according to the changes of temperature and weather. With the increase of temperature, it is better to change the bottom frequently, and it is better to use em bacteria in aquatic products alternately. The effect will be better.