The hot summer season is over and usher in a cool autumn. The temperature difference between day and night and the peak of feeding amount are followed. As a result, the water quality of aquaculture water is prone to deteriorate during this season, and it is easy to induce various aquatic animal diseases. Therefore, the following issues should be noted during cultivation:
(1) With the increase of feeding amount and excrement, various bait and organic contaminants will accumulate in the water. Therefore, it is necessary to pay attention to the changes of dissolved oxygen in the aquaculture water and prevent floating heads and even pans from occurring. Increase the amount of water exchanged, and at the same time start the aerator, avoiding oxygen deficiency. (2) The water quality management must not be slack, always pay attention to the changes of ammonia nitrogen and nitrite in the water, and pay attention to the weather forecast. According to the weather, water temperature, etc., scientifically set the feeding amount and feeding method, stick to the patrol pond in order to find the abnormal situation, and timely deal with.
(3) The prevention and treatment of diseases should be handled under the guidance of professionals according to the actual situation and the characteristics of the aquaculture water body, so as to prevent the abuse of drugs causing harm to the water quality and the cultured objects.
Diseases that need attention:
Bacterial sepsis of freshwater fish: the epidemic time is from March to November, and the epidemic peak is from May to September. The main manifestations are severe bleeding caused by upper and lower jaws, lids, eyes, etc., and fish on both sides of the diseased fish. Anal swelling, abdominal pale yellow or light red water, liver and spleen and kidney enlargement, intestinal wall congestion, intestinal cavity with a lot of liquid or gas.
Prevention: Use potassium permanganate solution with a concentration of 0.02% to 0.1% for medicated bath for 10 minutes. Apply rhubarb serum externally. Dilute with appropriate dilution with water. Quanchiposa is used every 15 days during the season of high disease incidence. The fish body was given orally vitamin K3 powder for 3 days.
Shrimp red leg disease: The epidemic time is from June to November, August to September is the peak period of the epidemic, manifested as reddened limbs, swimming feet is the most obvious, the temporal area of ​​the cephalothorax is pale yellow or light red, the liver was Light yellow or dark brown, inflexible muscles.
Prevention: External use of bactericidal red, Quanchiposa, 1 day, once every 2 days, while the mixed bait was fed with the new enzyme peptide immunopolysaccharide for 3 days to 5 days.
Grass carp hemorrhage: the epidemic season is June to September, the water temperature 25°C～30°C is the peak of the epidemic season. The diseased fish manifests as hemorrhage at the base of the palatal lid and fins, and the intestinal tract of the abdomen, liver and spleen congestion or blood loss and whiteness. When the temperature is high, secondary bacterial infections are easy.
Prevention: External use of strong iodine or A can be net Quanchiposa, mixed baits feeding Sanhuang scattered or yellow Taino scattered.
Cyclophiliasis: Multiple in the spring and autumn, when the body of fish is heavily parasitized by the ringworm, it appears that the sputum mucus is increased, swollen, and the epithelial cell hyperplasia is serious and the sputum is fused.
Prevention: Clear aquaculture ponds with lime in advance, fish species can be used before 0.02% to 0.1% potassium permanganate solution bath 15 minutes to 20 minutes, external spores scattered Quanchiposa, once every 3 days to 4 days, Or use 100 grams of Quanchiposa.
Mumps: The epidemic season is from May to October. The main manifestations are systemic edema. The neck is particularly severe. There are massive hemorrhages in the carapace and plastron. There are blood clots in the chest or abdomen or the salivary glands are red and gastrointestinal anemia.
Prevention: A can be diluted with appropriate water, and the Dianchi, pool walls and tools are thoroughly sterilized on a regular basis.
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