With the advent of winter, the temperature dropped and the farmed fish entered the wintering period. It is very important to strengthen feeding and management during this period and do a good job of prevention and treatment of fish diseases. Here are some of the common winter fish diseases and prevention methods.
Vertical scale disease
It is prone to occur with the prostrate when wintering. The symptoms are rough surface, the scales are erected like a loose ball, the base of the scale is edematous, and the liquid is slightly pressed out. Prevention: In the initial stage of the disease, flush the pond with fresh water; in addition, use 3% salt water to dip the fish for 15 minutes.
Filariasis
This disease is mainly harmful to fish species. It is caused by the floating filariae invading the skin of the fish and the skin. When a large number of filariae parasitize the skin of the fish, a layer of blue-gray mucus is formed. Prevention: Quanchiposa 5:2 by the ratio of copper sulfate and ferrous sulfate mixture, 0.7 grams per cubic meter of water; in addition to 3% salt water dip fish for 30 minutes.
Frostbite
When the water temperature in the pond is very low, the fish enter a state of paralysis and may even freeze to death. Prevention: Do a good job of cold insulation, such as the construction of winter sheds, deepen the pool water, etc.; In addition, when the temperature is high, appropriate to feed the bean cake, rapeseed cake, etc., to enhance the fish's ability to resist cold.
Mildew (also known as water mildew)
Often caused by scaling off, skin damage caused by water mold. When the mycelium grows in large numbers, it appears cotton-like and grayish-white, visible to the naked eye. Prevention: Use 3% salt solution to dip fish for 15 minutes to 20 minutes, can play a preventive role; after the onset of Quanchiposa salt and baking soda mixture (1:1 ratio), the amount of water per cubic meter of 2 grams, continuous Spill 2 days to 3 days.
Small melon worm
Parasitized by the small melon parasitized on the fish's skin, tendons, fins, etc., there are many small white spots on the lesion visible to the naked eye, when the skin is covered with a layer of white film, the swimming of the diseased fish is slow, the floating water surface; The fish body constantly rubbed against other objects and soon died in batches. Prevention: 250 grams per acre with fresh chili, ginger 100 grams Jianshui Quanchiposa.
Cloud disease
The disease occurred at temperatures below 15°C. The diseased fish had more surface mucus secretion, and the head, fins and body surface formed a layer of white serosa. The tail fins were more obvious. Severe disease can be complicated by vertical scale disease. Diseased fish body weight loss, loss of appetite, head often out of the water, see people unresponsive. Prevention: Antibiotic baits can be fed 2 times to 3 times a month; after the onset of illness, the fish body is soaked with 3% to 5% salt for 10 minutes to 15 minutes with good results.
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