The correct method of medication for fish

Administration of drugs

The main drugs used to prevent and treat fish diseases are halogens (bleach, sodium chloride, iodine, etc.), heavy metal salts (copper sulfate and ferrous sulfate, copper chloride, potassium dichromate, etc.), sulfonamides (sulfadiazolium, sulfathiazole, sulfadiazine, etc.), furans (furacilin, furazolidone, etc.), organophosphorus pesticides (trichlorfon, etc.), antibiotics (penicillin, streptomycin, chloramphenicol, chlortetracycline, oxytetracycline, etc.) Erythromycin, etc.), Chinese herbal medicine (, garlic, Magnolia, iron amaranth, etc.) And other germicidal dyes such as malachite green and methylene blue, quicklime, sulfur, borax, potassium permanganate and so on.

There are usually four methods of pesticide application:

① hanging bag (basket) method.

The bag or basket containing medicine is suspended in the food table of the fish pond or in the water around the food farm to form a drug action area. The fish automatically enter and leave the area within the tolerable drug concentration range and are affected by the drug to kill the pathogens on the body surface and Gill. It is generally used for prevention or early treatment. Copper sulfate and ferrous sulfate hanging bags are commonly used to control grass carp rotifer and Chinese oyster disease, and bleaching powder hanging basket is used to control red skin disease and Gill rot disease of herring and grass carp.

② immersion method.

The fish is immersed in a container with a higher concentration of the drug and forced to give the drug in a short time, thus killing the pathogens on the fish's body surface or Gill and harmless to the fish itself. 2% salt concentration and furacilin 20ppm concentration are commonly used to control myxobacteria white head and white mouth disease, Gill rot disease, etc., and potassium permanganate 10~20ppm concentration is used to control the third generation disease, ring disease, etc.

③ sprinkling method.

Is one of the most commonly used methods. That is to say, the drug concentration which is effective in killing a certain disease but safe to the fish itself is sprinkled all over the fish pond to kill the pathogens in the body surface, Gill and water of the fish. In order to use this method, the volume and dosage of pool water must be calculated accurately. The mixture of copper sulfate 0.5ppmm and ferrous sulfate 0.2ppm is commonly used to treat rotifer, fish wave bean disease, oblique tube disease, Chinese oyster disease, etc. Rhubarb 2.5~3.75ppm concentration is used to treat myxobacteria white head and Gill rot disease, and crystal trichlorfon 0.25~0.5ppm concentration is used to treat trichlorfon trichlorfon 0.25~0.5ppm concentration to treat trichlorfon trichlorfon.

④ oral method.

Feeding fish with palatable granules mixed with drugs in the bait is a method of drug prevention and treatment for visceral organ diseases. Raw garlic, salt and sulfonamidine are commonly used to control herring and grass carp enteritis, and sulfathiazole or sulfur powder and iodine tablet mixture are used to control herring coccidiosis.

⑤ injection method

Such as vaccination to prevent some viral or bacterial fish diseases, injection of penicillin and streptomycin to treat printing diseases and postpartum injuries of grass carp, silver carp and bighead carp.