Prevention and control of fish disease with Radix Isatidis

Banlangen, also known as Radix Isatidis and Radix Isatidis, is bitter and cold. Radix Isatidis has the effects of heat-clearing and detoxification, cooling blood and stopping bleeding. Its decoction has inhibitory effect on both Gram-negative and Gram-positive bacteria. The acetone extract of root also has bacteriostatic effect. Radix Isatidis has a good effect on a variety of bacteria and viruses. The application of Radix Isatidis in the prevention and treatment of fish diseases is introduced as follows:

First, prevention and treatment of grass carp hemorrhagic disease. One month before the onset of the disease season, one course of treatment of Radix Isatidis and andrographis paniculata mixture was given every semimonthly to prevent hemorrhagic disease. The specific methods are as follows: on the first day, soak every 100 kg of fish with 2.5 kg of Radix Isatidis and 1.5 kg of andrographis paniculata with boiling water for 1 hour, take juice and add 0.5 kg of salt, then mix in 4 kg of wheat bran or cornmeal to make bait; on the second day, take the residue left on the first day in the pan and fry it in water for 1.5 hours, and the juice is fed again according to the method of the first day. Or every 100 kg of fish is fed with 0.5 kg of rhubarb, Cortex Phellodendri, Scutellaria baicalensis, Radix Isatidis and 0.5 kg of salt every day for 7 days to prevent and cure grass carp hemorrhagic disease. Or 70% of Radix Isatidis and 30% of bitter wood are mixed in proportion, 2.5 kg ~ 5 kg of bait per 100 kg fish per month, of which 0.5 kg of powder and 5 ~ 10 g of sulfonamides are added for 5 ~ 7 days.

Second, prevention and treatment of bacterial Gill rot and enteritis of grass carp. First sprinkle 15 kilograms of quicklime throughout the pond according to the water depth of 1 meter per mu, then use 50 grams of Huangbian whisker root and 100 grams of Radix Isatidis, add 2.5 kilograms of water to boil medicine soup, and then use medicine soup to boil rice or rice to feed fish, once a day for 2 days. If the patient is seriously ill, he will be fed 3 ~ 4 times in a row.

Third, prevent and cure the complications of red skin disease, Gill rot disease and enteritis of long-snout fish. Every 100 kg of fish with Radix Isatidis, Coptis chinensis, Scutellaria barbata, andrographis paniculata, Pleurotus ostreatus, thatch root and licorice juice 100 grams in proper proportion, adding 2 grams of oxytetracycline, evenly mixed into the feed, once a day for 5 days, combined with external germicidal disinfection drugs can effectively prevent and cure the disease.

Fourth, prevention and treatment of soft-shelled turtle branchial adenitis. Spraying the decoction of 20ppm and Radix Isatidis 40ppm evenly in the whole pool can effectively prevent and cure the Gill disease of soft-shelled turtle, and the serious soft-shelled turtle was injected with compound injection of Folium Isatidis and Radix Isatidis at a dose of 2ml / kg, twice a day, and then immersed in the mixture of 20ppm and Radix Isatidis (1 ∶ 2).