The temperature in Anhui Province will continue to rise in June, as the saying goes, "eat the Dragon Boat Dumplings, just send the cold clothes", the maximum temperature of the month may reach 35 ° C, the water temperature will also rise sharply to 25 ~ 30 ° C; rainy, heavy rain, strong convection and other weather occasionally appear. In the early summer, the ambient temperature changes rapidly, the water quality is gradually eutrophicated, and the diseases of aquatic animals tend to be frequent and high. Parasitic diseases, bacterial diseases, crayfish hypoxia (leukoplakia syndrome, infectious subcutaneous and hematopoietic organ necrosis, shrimp liver and intestinal cytozoasis test result is high), grass carp "three diseases" have entered a high incidence period, the majority of farmers should strengthen management, timely prevention, while paying attention to hypoxia pan pool.
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1. Crucian carp: prone to freshwater fish bacterial sepsis, crucian herpes virus-type II., anchor crucian disease, ringworm disease, sporecosis. The high-density pond culture area in Anhui Province is the key focus area.
2. Grass carp: prone to freshwater fish bacterial sepsis, gill rot, enteritis, red skin disease, Chinese loach disease, anchor head loach disease, hepatobiliary syndrome, grass carp hemorrhagic disease may also occur. Pond culture of second-instar grass carp in Anhui Province is a key area of focus.
3. Yellow white carp: prone to anchorhead loach disease, Chinese bream disease, and may be infected with bacterial sepsis of freshwater fish. The high-density pond culture area in Anhui Province is the key focus area.
4. River crab: edema disease, water deflation disease, molting shell failure may occur, pond high-density culture may occur gill rot disease, and tremor disease disappears for a few years, and then it will reappear. When the ecological crab farming area of Tu County, Wuwei County and Wuhu County pond crab farming area are the key areas, and the juvenile crab breeding and other breeding areas in Xuanzhou District should also be concerned.
5. Crayfish: the water temperature gradually increased in June, the intake of crayfish increased, the discharge of residual bait feces increased, the water quality deteriorated, the leukoplakia syndrome (infectious subcutaneous and hematopoietic organ necrosis, shrimp rainbow virus disease, shrimp hepatolental cytozoasis monitoring positive rate is higher), iron shell, head, tail blisters, rot shell, enteritis common. The concentrated area of rice field shrimp farming in Anhui Province is the key focus area.
6. Turtles: prone to rotting skin disease, mumps, white bottom plate disease, June is the greenhouse turtle moved to the outer pond for ecological breeding season, Huaiyuan County, Nanling County, Wuwei County and other turtle and turtle breeding areas should focus on attention and prevention.
7. June is the key season for the cultivation of summer flower fingerlings of various types of fish fry, with a high incidence of parasitic diseases such as wheelworms and ringworms, and the cultivation of summer flower fingerlings in ponds in Anhui Province, especially in areas with high density cultivation, is the focus area.
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1. To prevent wheelworm disease, water should be appropriately added to the pool, the concentration of organic matter in the pool water should be adjusted, and the national standard fishing drug copper sulfate and ferrous sulfate mixture or commercial drugs for the treatment of wheelworm disease should be used for treatment. Drugs such as the prevention or treatment of fish anchorhead loach, Chinese loach disease using fishing enemy hundreds, and the national standard fishing drug mebendazole solution (for aquatic use) are very effective for anchorhead loach, and also have a certain effect on ringworm disease (sensitive fish should be used with caution).
2. To prevent bacterial sepsis and no other bacterial diseases in freshwater fish, management should first be strengthened, new water should be regularly filled, photosynthetic bacteria should be used for high ammonia nitrogen, bacillus or EM should be used to regulate water quality, high organic matter should be fed with high quality feed, and water bodies should be disinfected with calcium peroxide (for aquatic use). According to the results of the 2020 drug susceptibility test, the national standard fishing drugs florfenicol powder and enrofloxacin powder (for aquatic use) with more sensitive pathogens were selected to treat fish bacterial sepsis, gill rot, enteritis and erythroderma.
3. To prevent grass carp hemorrhage, use the national standard fishing drug povidone iodine (for aquatic products) to sprinkle the whole pond for water disinfection during the onset season, and can also use calcium peroxide (for aquatic products) and other disinfectants to sprinkle the whole pool, and at the same time take the national standard antibiotic drugs internally, which has an auxiliary therapeutic effect.
4. Prevention of crayfish disease, June is the rice field planting period, the water level is low, you need to salvage over-dense aquatic grass, change the water frequently, after the seedlings return to green, if the shrimp seedlings are released for the second time, there may be enteritis, rot ulcers and tail blisters, you can use 0.3 ~ 0.5mg / L povidone iodine (for aquatic products) sprinkled disinfection, in severe cases, use enrofloxacin + three yellow + vitamin C (aquatic) mixed bait feeding treatment.
5. Prevent turtle diseases, avoid injuries in the stocking process, reasonably control the stocking density, feed the full-price feed with balanced nutrition, add natural feed in an appropriate amount, and move the greenhouse turtle to the outer pond for stocking, and do a good job of separate breeding of male and female. Calcium peroxide (for aquatic products) is used to disinfect water bodies in the early stage of stocking, and appropriate water is added to improve water quality. Antibiotics such as national standard fishing drugs such as thiamphenicol powder and florfenicol powder have a good effect on the treatment of bacterial diseases of turtles.
6. In view of the lack of oxygen of fish, shrimp and crabs that may be caused by sweltering weather, attention should be paid to strengthening daily management, paying attention to observing the feeding and water quality of fish, and taking corresponding measures such as injecting new water and taking oxygenation in time when finding hypoxia.
Source: Anhui Aquatic Technology Promotion Station