Several common green environmental protection fishery drugs

Although quicklime and salt are not special fishery drugs, they are effective in preventing and controlling aquatic diseases, and do not pose a threat to the environment, and there is no problem of drug residues.

Sprinkling quicklime into the aquaculture water regularly can not only reduce the occurrence of many diseases, but also provide the necessary calcium elements for cultured organisms, which is particularly important for crustacean aquaculture. Usage: choose quicklime without weathering, clean the pond and disinfect it with 150ml 200kg per mu; use it once every 20 days or so for disease prevention and control, and use 15mu 20kg per mu with a water depth of 1m. Quicklime and pond fertilization can not be carried out at the same time, the time interval is generally about 5 days; quicklime is not used at the same time with chlorine-containing disinfectants, generally using chlorine-containing disinfectants and pesticides for 5 days before using quicklime; the pH value of the water is greater than 8, it is best not to use quicklime.

Tea seed cake, also known as tea withered, tea cake, is a by-product of oil extraction of Camellia oleifera. Because it contains a hemolytic saponin, it will kill all kinds of wild fish, frog eggs, tadpoles, leeches, snails, clams and so on. At the same time, tea seed cake is rich in protein, a small amount of fat and a variety of amino acids and other nutrients, tea seed cake cleaning pond disinfection, has a protective effect on aquatic plants. During the culture period, tea seed cake can prevent diseases such as fish hemorrhagic disease, bacterial rotten Gill, red skin, enteritis, kill pathogens and parasites (eggs) on fish body surface and Gill, and promote shelling of shrimp and crab. Usage: choose fresh, non-mildew lump or crushed tea seed cake, soak it for 1 day and night, then sprinkle it with dregs and juice throughout the pond, with about 50 kg per mu; prevent fish, shrimp and crab diseases, from April to October, use tea seed cake 5 kg per mu of water depth 1 meter, step it into the silt around the pond and in the center respectively.

Garlic and allicin have the effects of killing insects and eliminating accumulation, detoxifying and relieving pain, digestion, sterilization and relieving dysentery, and can inhibit Gram-positive and Gram-negative bacteria, many kinds of fungi and some viruses in varying degrees. Oral administration can promote intestinal peristalsis and enhance appetite. Usage: mash fresh garlic and mix feed, add garlic according to 1% of the body weight of aquatic animals, or 0.2% add allicin for 4-6 days. It can also be sprinkled with allicin and water in the whole pool, and the dosage is the water drug concentration of 4murmur20mg / L.

Salt at low concentration can stimulate the growth of pathogens, while at high concentration, it can inhibit the growth of pathogens, prevent uterine nematode disease, parasitic diseases of skin or Gill caused by protozoa, and fungal diseases and some bacterial diseases caused by water mold. Usage: crude salt is mainly used in aquatic products. 2% Mel 5% solution soaks aquaculture animals for 15 mi for 20 minutes to prevent multiple parasites on the body surface and Gill; the internal dosage is 25Mel 50g per kilogram of feed. The soaking time depends on the water temperature and the tolerance of the fish. Frogs have a poor tolerance to salt and should be used with caution.