Chinese medicine for preventing fish diseases
1. The Immersion Method involves bundling a certain amount of Chinese herbal medicines and soaking them in the fish pond near the food market or in flowing water. The extracted juice is then spread throughout the pond to prevent fish diseases. For example, 10 to 15 kilograms of maple, poplar, or eucalyptus leaves can be soaked per mu of fish pond to control lice, fleas, and other parasites. Additionally, white weed (4 to 5 kg per acre), ramie leaves (4 to 5 kg per mu), and small pine leaves (10 kg per mu) can be tied into 2 to 3 bundles and soaked daily. By turning the sap once a day, the released juice can help treat "red skin disease" in fish such as grass carp, herring, and bream.
2. Another method is to sprinkle chopped or decocted Chinese herbal medicine directly into the pond along with the residue. Alternatively, industrial methods can be used to extract active ingredients like alkaloids from the herbs. Once prepared as a powder, it can be mixed at a specific concentration and applied throughout the pond to prevent fish diseases. For instance, using 1.5 to 3 ml per liter of Gallnut Quanzhi Quanchiposa solution can effectively prevent gill disease and printing disease in grass carp, silver carp, and other species. Another example is using 2.5 to 3 kg of fresh five-claw dragon grass per mu, crushed into juice, mixed with borax (1.5 to 2 ml per kg), and administered for three days to treat "white head and mouth disease" in young grass carp, blue gill, and other fry stages.
3. The feeding method involves mixing the Chinese herbs into a mash or sauce and combining it with feed. For example, "Three Yellow Powder" (a mixture of rhubarb, cork, and yellow root in a 5:3:2 ratio) can be used during the peak season of grass carp diseases. Every 15 to 30 days, 500 grams of Three Yellow Powder and 250 grams of salt can be mixed with 100 kg of grass carp feed and fed for 3 to 6 days. This helps prevent bleeding disease in grass carp. Another approach is to mix 10 kg of peanuts, 500 grams of rhubarb powder, 250 grams of salt, and 250 grams of garlic with 10 to 20 kg of duckweed, goose, or wheat bran and rice flour to create bait. This mixture should be fed for one week, and it's recommended to stop feeding 1 to 2 days before starting. Early application during the onset season yields better results.
4. The saccharification method involves fermenting a mixture of Chinese herbal medicine and concentrated feed to achieve disease prevention. For example, using 60% straw powder and 30% to 50% bran, combined with an appropriate amount of pepper, can create fermented bait that helps prevent grass carp "enteritis" and promotes faster growth.
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