Prevention and control of small melon worm disease during overwintering period of cultured white pomfret
Watermelon disease is the second most common disease of freshwater white Pomfret during overwintering. Its incidence is lower than that of water mold, but the mortality per unit area is higher than that of water mildew, and it can also lead to water mildew.
1. Pathogen
Many small melon bugs.
2. Symptoms
Many punctate vesicles are visible to the naked eye on the fish surface and Gill petal and covered with a layer of white mucus; microscopic examination of these white spot mucus can find the presence of many small melon insects. The parasite tissue is inflamed and necrotic, and the fish gills sometimes bleed, showing dark red. When the cornea is parasitized, sometimes cause membranous eyes, diseased fish loss of appetite, fish weight loss, swimming in the water, breathing difficulties, can cause a large number of dead fish.
3. Prevention and control methods
① soaked the fish in 150ml formalin solution per cubic meter of water for 15 minutes for 20 minutes, once every other day, and used medicine for 2 ~ 3 times in a course of treatment.
② the whole pool sprinkled formalin, each cubic body of water with 1530 ml, so that the pool water concentration of 20 mg / L, use once every other day, 2 times for 3 times.
③ is mashed with 0.5kg ginger per mu of water, 0.25kg of chilli powder, 10kg of water, boiled into spicy ginger soup, diluted with 15kg cold water, and then sprinkled in the whole pool. Once a day for three consecutive days.
- Prev
Daily Management experience of Freshwater Pomfret
1. A kind of bait variety is fed directly with northeast soybeans. The other is fed with pellet feed, the protein content of pellet feed is more than 32%, and the fat content of the later feed should be increased. 2. Feeding method the feeding method of soybeans is to check the pool more than three times a day and eat
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Preparation before adult culture of freshwater white Pomfret
one。 Under pond conditions, the area of adult freshwater Pomfret culture pond is 10 mu, and the water depth is about 1.8 meters, which requires sufficient water source, fresh water quality, convenient injection and drainage, flat bottom and less silt. two。 Clear the pond and disinfect the dry pond at the end of the year to get rid of too much.
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