The spring is warm and the fry are being released. However, at this time, it is also a season for the proliferation of pathogens. The fry which is “freshly arrived†is prone to contracting patients. Therefore, prevention and treatment of diseases should be focused on. The diagnosis and control methods of five fry susceptible diseases are described below:
1. White skin disease. The disease was the whitening of the tail and the scales falling off. The tail rotted badly and died soon afterwards. Control methods: (1) bleaching powder is dissolved in water at a volume of 1 gram per cubic meter, and Quanchiposa; (2) Schisandra 2-4 grams per cubic meter Quanchiposa; (3) 0.5 grams per cubic meter of Furfural Spilled.
2. Scrap Ichthyosis. In the sick fish's crotch and body surface, "small white spots" are formed, and the body of the fish is prone to cause death. The disease can be controlled by 0.10.2ppm of mercuric nitrate or malachite green Quanchiposa or by the use of capsaicin therapy, that is, use 1.5ppm dry chili powder and 1ppm ginger mixture, add water and boil for 30 minutes, dip water Quanchiposa, once daily , continuous 2 or 3 times, the effect is good and economic.
3. Bubble disease. The diseased fry floats on the surface of the water. There are large bubbles in the intestine. The body loses its balance. The head is down, and sometimes it struggles. When it swims in the deep, it flies on the surface of the water and soon dies. Each mu of water surface with burning plaster 4 kg mash, fresh plantago 4 kg, soaked soybeans 5 kg, plus water swelling, mixing refining, Quanchiposa, for the treatment of bubble disease has a good effect; or with a concentration of 1.5%-2.5% ammonia-repellent water solution is poured and the whole pool is splashed, and the treatment effect is also good.
4. Trichinosis. The parasite parasitizes on the surface and stern of the fish, stimulates the fish to produce a large amount of mucus, and has a phenomenon of “red head and white beakâ€, which is harmful to the species of summer flowers. Can be used 0.7ppm copper sulfate and ferrous sulfate mixture (5:2) Quanchiposa to control, can also be used buckwheat branches and leaves per acre of water per meter with a pond of 30 kg of boiling water Quanchiposa treatment.
5. Saprolegnia. At first, the disease is not obvious. Once the bacteria enters the fish body and spreads into the muscle, the fish body will appear gray-white floc, and the mold will produce a lot of enzymes to decompose the fish tissue, causing the fish body to be strongly stimulated and secrete a lot of mucus. The fish is restless in the water and eventually causes the fish tissue to become necrotic. Control methods: (1) Clearing the pond thoroughly with quick lime in the fish pond can reduce the occurrence of the disease; (2) Care should be taken in the dropping process to avoid injury to the fish; (3) Dip the fish body with 10 ppm malachite green solution. In 20 minutes (or 0.2ppm of malachite green Quanchiposa), you can also use 4/4 of the salt and 4/4 of the baking soda mixture Quanchiposa.
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