The quality of aquatic fingerlings will affect aquaculture production and economic benefits. Practice has proved that even healthy fish, shrimp, and crab species inevitably carry some pathogens, and ponds that have been disinfected in clear ponds will still bring pathogens into the pond if they are stocked without disinfection. Therefore, the seedlings should be immersed in different ponds for different species and different pathogens before entering the pond. The commonly used disinfection methods before the seedlings are described as follows:
I. Seed soaking agent: This product has obvious preventive effect on freshwater crabs, fish, shrimps, shellfish, turtles, ticks virus diseases, bacterial diseases, fungal diseases. For every 50 kg of aquaculture water, add 10 ml of this product, stir well, and soak the seeds for 35 minutes, then pour the liquid and seed into aquaculture water.
Second, salt: fish, shrimp, crab seed before stocking with 2% -5% saline soaked for 10-20 minutes, can kill myxobacteria, water fungus and trichoderma and so on.
Third, bleaching powder: The bacteria, viruses, fungi have different degrees of killing, can prevent red skin, gills and other bacterial skin diseases. Usage: Add 10g of bleaching powder per cubic meter of water and mix it evenly. Fish and crab seeds will be put into the pond about 10-15 minutes after dipping.
4. Potassium permanganate: Fish, shrimp, and crab seedlings are soaked in an aqueous solution of 10-20 g/m 3 for 20-30 minutes to kill the third generation of fish, the ringworm, trichoderma, and the filamentous bacteria and arcs of shrimps and crabs. Bacteria and so on.
5. Trichlorfon: Fish species should be washed with 20-30 g/m3 of fish dipterex solution for 15-20 minutes before stocking, killing parasites such as the three generations of parasites, ringworms, anchor heads, and maggots.
6. Copper sulphate: 8 g/m3 copper sulfate and 10 g/m3 bleach mixture. At a water temperature of 15°C, the fish body will be soaked for 20-30 minutes. It can prevent rot, red skin, trichoderma and oblique tube. Insects, hairy worms and other diseases.
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