How to prevent and cure the disease of yellow croaker

How to prevent and cure the disease of yellow croaker

First, two kinds of cleaning and disinfection of the pond in winter (1) dry pond cleaning: drain the pond water first, or leave water 6cm ~ 9cm, emulsify with 75kg ~ 100kg of quicklime per mu, and sprinkle it evenly all over the pond without cooling. After clearing the pond, the drug power generally disappears after 7 ~ 10 days, and the fish can be released. (2) bleach cleaning pond: general bleach contains about 30% available chlorine, its dosage is 15 kg per mu, sprinkled all over the pool. Generally, the drug power disappeared completely after 4 ~ 5 days.

2. The seedlings should be soaked in 5% salt water for 10 minutes before putting the seedlings into the pond.

Third, water quality management insists on observing algae phase and algae concentration in water bodies. According to the water color, use inorganic fertilizers (urea, calcium superphosphate, potassium dihydrogen phosphate, etc.) to adjust the water fertility and keep the transparency at 30 cm ~ 35 cm. The aerator is used scientifically according to the determination of dissolved oxygen and the weather and water quality.

IV. Commonly used drug prevention and treatment

(1) insecticide: killed by the enemy. According to the concentration of 0.03ppm per cubic body of water, sprinkle the whole pool or sprinkle with the concentration ratio of copper sulfate: ferrous sulfate = 0.15 ∶ 0.05ppm. The above insecticides have good insecticidal effect on ring worm, rotifer and so on, but the two drugs can only be used alone, not mixed or used alternately, let alone overdose.

(2) Antibacterial and anti-inflammatory agents: oral medicine (mixed evenly into granules in the feed) sulfamethazine tablets, 15 ~ 20 grams per 50 kg diet for 3 days, twice a day or 10 grams of dysentery plus 20 grams of oxytetracycline mixed well into 50 kilograms of food, 3 days in a row, twice a day; oral penicillin capsules can also be used to feed (5 grams) for 3 days, twice a day. Disinfect the fish: dilute and soak the fish with 0.25% bleaching powder or penicillin powder for 10 minutes. The above oral ingredients are best fed now, once for 3 days. Mainly for diseased fish infected by bacteria.

(3) for the treatment of hemorrhagic disease: 50 kg of raw salt per mu was sprinkled throughout the pond, and 100 grams of sulfathiazole and 10 grams of vitamin c were evenly mixed in the feed every 50 kg of bait, fed twice a day for 3 days. In the process of preventing and controlling the disease of Pelteobagrus fulvidraco, it is generally said that trichlorfon is refused to be used to kill insects.