Prediction and forecast of aquaculture diseases in Hunan Province in April 2021
By: Date: 2021-03-25 Categories: foodtechnology Tags: ,
  According toHunanThe Provincial Meteorological Department predicts that there will be periods of low temperature and rain in April. In the weather, there are heavy to heavy rains in some areas, the temperature is in the range of 8-22℃, and the precipitation is between 50-140mm. Due to the relatively large temperature difference, which will further affect the water quality, various pathogens are also in the growth and development period, and bacterial diseases are prone to occur. Based on the incidence characteristics and climatic conditions of Hunan Province over the years, the disease predictions for this month are as follows:

  1. Illness prediction

  1. Carp spring viremia:it can infect all carp sizes, and young fish below 1 year old are the most vulnerable, and the water temperature is prevalent when the water temperature is 12~18℃. , Susceptible species include carp, koi and so on. The fry breeding grounds in Wangcheng District of Changsha, Pingjiang County of Yueyang and other places should focus on prevention and control.

  2. Saprolegniasis:It is prevalent when the water temperature is 10~18℃. The disease occurs frequently and is widely distributed. It can occur from fish eggs, fry to adult fish , Are distributed throughout the province.

  3. Bacterial gill disease, enteritis disease. It mainly occurs in cultured species such as common carp, crucian carp, grass, silver carp, and bighead carp, and is distributed throughout the province.

   2. Prevention measures

  1. Thoroughly clear the pond:Eliminate silt, use quicklime, tea bran, bleaching powder, pyrethroids, etc. to clear the pond for disinfection, kill fish pests, etc., to ensure good Growth environment;

  2. Put healthy seedlings, buy quarantine qualified seedlings from a regular seedling farm, disinfect the seedlings before entering the pond to prevent pathogens from being introduced, Control the occurrence of diseases from the source;

  3. Adjust the water quality of the pond, set up aeration equipment at multiple points, regularly monitor and disinfect, and cultivate a”fat, refreshing, tender and live” water body. Fish provide a good living environment, enhance their physique, and improve disease resistance;

  4. Reasonably set the breeding density, catch the large and leave the small in time, and standardize the operation when the seed is transferred to the pond and put into the pond to avoid the infection of pathogenic bacteria caused by the injury of the fish body, regularly Disinfect breeding tools;

  5. Water mold prevention and control:prevent the fish from pulling the net carefully to prevent the fish from being injured and causing secondary infection; use 1%salt and 0.04%before the fish are placed in the pond Soak the soda mixture for 20 minutes, once a day.

  6. Bacterial fish disease:Use 0.4g/m3 of trichloroisocyanuric acid and other disinfectants to regularly splash the whole pond, and use enrofloxacin at the same time. For bait feeding, use 10%enrofloxacin in an amount of 2 to 4 grams per kilogram of feed for a course of treatment for 5 to 7 days. Cure fish bacterial sepsis, gill rot disease and enteritis disease.