Systematic prevention of diseases in fish and shrimp

Systematic prevention of fish and shrimp diseases refers to taking preventive measures to control the occurrence and development of fish diseases from the seedling stocking stage to the beginning of adult fishing. The occurrence of fish and shrimp disease is the result of both body and external factors, in which the infection of pathogenic microorganisms is an important factor leading to the disease of fish and shrimp. As there are pathogenic microorganisms in the aquaculture water environment, such as viruses, bacteria, molds, parasites and other pathogenic microorganisms, once the environment deteriorates, the resistance of fish and shrimp decreases, which will cause a large number of pathogenic microorganisms to invade the fish and lead to the epidemic of diseases. Therefore, how to systematically prevent the outbreak of fish and shrimp disease is not only to reduce the breeding cost, but also an extremely important way to put an end to the disease.

Yuanzheng disinfectant No. 2 (for fish and shrimp) is a compound aquatic disinfectant successfully developed by our company by adopting German production technology and advanced technology and multi-step synthesis and complexation of strong virus killing factor (iodine). It has the efficacy of super sterilization, deodorization and improving water quality. compared with other types of disinfectants such as chlorine-containing disinfectants, it has strong ability to resist organic matter, strong resistance to hard water, no irritation and no side effects. The effective action time in water can be as long as 7-10 days.

According to the current epidemic characteristics of fish and shrimp diseases, especially those of light and seawater shrimp, combined with Expedition disinfectant No. 2 (special for fish and shrimp), the systematic method of preventing fish and shrimp diseases can achieve better results. The specific methods are as follows:

1. Clear the pond and disinfect. Before using the fish and shrimp breeding pond, clear the pond with water with Expedition disinfectant No. 2 (for fish and shrimp only) and sprinkle it throughout the pond. The dosage of water depth per mu is 750-1500ml for 5-7 days and then release the seedlings. You can also disinfect the pond with bleach and water first, sprinkle it in the whole pond, use 13-15 kg per mu of water depth for 3-4 days, and then disinfect again with Expedition disinfectant No. 2 (for fish and shrimp), sprinkle the whole pond with 500-1000ml per mu of water depth, and release seedlings every 3 days. The above two methods can kill most of the pathogenic microorganisms in water.

2. Stocking fish and shrimp fry that are physically strong and do not carry pathogenic microorganisms, operate carefully to avoid damage to the fish.

3. Seedling disinfection. Before the seedlings were put into the pond, they were placed in large buckets or large pots, and each cubic meter of water was bathed with Yuanzheng disinfectant No. 2 (special for fish and shrimp) 1ml (body surface disinfection). After 20 minutes, most of the pathogenic microorganisms on the body surface could be killed.

4. Strengthen the feeding and management, ensure the nutritional needs of fish, keep the pond water fat, alive, tender and cool, and reduce the occurrence of various environmental stress.

5. Prevention and disinfection. In the disease-prone season from April to June, Expedition disinfectant No. 2 (for fish and shrimp) was regularly used with 100-200ml per mu of water depth and sprinkled in the whole pond. Preventive disinfection is carried out once every 10 days, or fish Kangning (produced by our company) is fed with 100g per 100kg fish body, twice a month, 5 days each time, which can prevent the occurrence of most fish and shrimp diseases.

6. Treatment. After the occurrence of fish disease, immediately use Expedition disinfectant No. 2 (for fish and shrimp) with 200-400ml per mu of water surface depth, sprinkle it in the whole pond, twice a week (interval of 3 days), continuous use for 2 weeks, until cured; at the same time, if combined with Yukangning, 100g per 100kg fish body reuse drug is mixed with bait for 5 days, once a day, an excellent therapeutic effect can be achieved.

7. Points for attention.

A. When using Expedition disinfectant No. 2 (for fish and shrimp), dilute it about 300 times, then spread it evenly in the fish pond and start the aerator at the same time (20-30 minutes).

B, to use Expedition disinfectant No. 2 (for fish and shrimp), please choose to give the medicine at 10:00 or around 6pm on a sunny day, the effect is the best.

C. Foam floating on the pond surface after sprinkling is a normal phenomenon and has no harmful effect on fish and shrimp.

Explanation: after adopting the above systematic prevention and control measures, we can basically put an end to the occurrence of most fish diseases, especially white spot baculovirus disease, hepatopancreatic virus disease, vibrio disease, swollen Gill, black Gill, yellow Gill, red leg disease and ciliosis of shrimp, explosive hemorrhagic septicemia, rotten Gill, enteritis, red skin, printing disease and bacterial disease and virus disease of river crab, eel and soft-shelled turtle in domestic fish.