Spring water temperature rises to beware of carp herpesvirus disease
2020-05-06
Carp is a traditional breeding species. Due to its fast growth and high meat yield, it is cultivated in Jiangsu, Sichuan, Henan and Tianjin. The Yancheng area of Jiangsu Province is mainly mixed with grass carp and intensive carp, while the mixed culture of fish and shrimp is the most common in Lianyungang area. In recent years, carp diseases have gradually intensified. Among them, carp herpes virus disease is the most serious disease that harms carp farming. The onset water temperature of the disease is about 18-30 ℃, and the peak water temperature of the disease is 23-28 ℃. There are two waves of epidemics in the northern region each year, from late May to July and mid-to-late August to September.
One.Onset disease
Sick fish eyeball depression, head atrophy, head and back black, especially the head is the most obvious. With the development of the disease, the eyes are obviously sunken, and the local necrosis of the gill pieces is white, mostly on the roots of the gill filaments and the innermost gill pieces. Sick fish swim slowly in the pond and gather at the inlet and the edge of the pond. Anatomical fish, more fatty liver, liver bleeding point, intestinal redness.
2. Preventive measures
The disease is a viral disease, no specific drugs, pay attention to prevention.
During feeding, the feeding rate should be strictly controlled to avoid excessive liver and gallbladder load and damage to detoxification, digestion and immune function.
2.According to the epidemic characteristics, before the epidemic20-30 days,It can be taken orally with enrofloxacin, strong liver growth factor, virus nemesis and aquatic special multi-dimensional, and fed for one week to enhance fish immunity and anti-stress ability.
3. Disinfection in time after insecticidal, can be usedZhongren gold iodine water disinfection, Zhongren gold iodine is a high concentration of sediment iodine, the middle and lower water disinfection more thoroughly.
4. Regular use of clear water detoxificationDetoxification and beautiful bottom change.
5. When fertilizing water, diatom can be used with probiotic group to transfer water and fertilize water to keep the water environment stable.
Three. Treatment methods
First of all, we must stop or reduce the material, do not add water, do not blindly use insecticidal and disinfectant drugs, at this time the fish constitution is poor, many drugs can aggravate the death, should use less stimulating drugs to prevent bacterial infection aggravated death, harmful substances to water quality (nitrite, ammonia nitrogen, hydrogen sulfide) exceed the standard and use too many drugs and pond with large death, first use drugs with detoxification and anti-emergency, suchStress Detoxification CE, external use the next dayWuhuang Jiedu LiquidDisinfection of water bodies. At the same time, reduce the material and mix the internal medicine:Florfenicol3 bagsGangdan Kangtai1 bagAstragalus polysaccharide1 bagVirus Nemesis1 bag mixed with a bag of ingredients, continuous feeding for 4-5 days. After the condition is stable, the feeding will be slowly resumed and added to the feed.Astragalus polysaccharideandAquatic special multi-dimensional, liver detoxification, improve immunity.
Virus NemesisIt is a high concentration of Chinese medicine concentrate, which contains honeysuckle, scutellaria baicalensis and forsythia, with strong resistance to virus and repair liver injury. Honeysuckle can not only clear heat and detoxify liver fire, but also alleviate the damage of drugs and other substances to the liver and gallbladder. Scutellaria baicalensis can enhance the body's immune ability, with anti-stress and antibacterial effect, at the same time can remove the virus and inhibit the spread of the virus. Forsythia suspensa can clear heat and detoxify, in the protection of liver and gallbladder at the same time also has a strong antibacterial effect.
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