Summer is the peak period of disease occurrence in Europe. Due to the continuous high temperature and high water temperature, the growth of carp is in an uncomfortable environment, resulting in long-term high-temperature stress reaction, resulting in weakened constitution. During the high water temperature period, the squid had a large food intake, the pollution of the cultured water was increased, and the number of pathogenic bodies increased. Summer was the most frequent and most harmful season for carp disease. Maintain a good culture environment: China's market place attaches great importance to pathogens. Most of them are equipped with microscopes, but they do not pay enough attention to water quality. This is an important cause of diseases. The optimum physical and chemical indicators of the European seawater to the water environment are: PH: 6.8-7.5, DO: 5mg/L, TC: 24-26°C, H2S: Maintaining a stable breeding water environment The carp is often unsuitable for the change of the aquaculture environment or even the disease Therefore, it is extremely important to maintain the stability of the aquaculture water environment. In summer, the water temperature is high and Europa is already in an uncomfortable state. When the water temperature rises by 1-2°C, a stress response will occur. Should pay attention to the water level and weather conditions from noon to before 4 pm, adjust the sewage, change the time, try to control the water temperature does not have a short-term drastic changes. The frequent thunderstorms and typhoon storms in summer often lead to turbid water sources or diffuse toxic substances in the bottom silt to the entire pool, resulting in deterioration of water quality. Caused an outbreak of major diseases. Some ecological ponds for cultivating plankton should keep aquatic organisms relatively stable. Once the biological phases are destroyed, the farming environment will also undergo an instantaneous drastic change. Only by maintaining a stable ecological environment can the healthy and healthy survival of farmed carp be guaranteed. Grasp the appropriate amount of feed and feeding method European eel breeding process, the appropriate feeding amount in different stages, in addition, the amount of feeding and culture conditions are closely related. Different water temperature and specifications European 鳗鲡 Suitable daily feeding rate (鳗鲡% of body weight) Water temperature (°C) / Specification (tail/kg) 10 10-12 12-16 16-20 20-24 24-26 26-28 28-30 30 10 0.8 0.8-1.0 1.0-1.5 1.5-2.0 2.0-2.5 2.5-3.0 3.0-2.0 2.0-1.0 1.0 10-20 1.2 1.2-1.5 1.5-2.0 2.0-2.5 2.5-3.0 3.0-3.5 3.5-2.5 2.5-1.5 1.5 20-50 1.5 1.5-1.8 1.8-2.3 2.3-2.8 2.8-3.5 3.5-4.0 4.0-2.8 2.8-1.8 1.8 50-100 1.8 1.8-2.0 2.0-2.5 2.5-3.0 3.0-3.8 3.8-4.3 4.3-3.0 3.0- 2.0 2.0 100-250 2.0 2.0-2.2 2.2-2.8 2.8-3.5 3.5-4.2 4.2-4.8 4.8-5.0 5.0-2.5 2.5 250-350 1.8 1.8-2.0 2.0-2.6 2.6-3.5 3.5-4.5 4.5-5.5 5.5-6.0 6.0-3.5 3.5 350-500 1.5 1.5-2.0 2.0-2.5 2.5-3.5 3.5-4.5 4.5-6.0 6.0-6.5 6.5-4.0 3.5 500-800 1.3-1.8 1.8-2.5 2.5-3.5 3.5-4.5 4.5-6.5 6.5 -7.0 7.0-4.5 4.5 800 1.0 1.0-1.5 1.5-2.5 2.5-3.0 3.5-4.5 4.5-7.0 7.0-7.5 7.5-4.5 4.5 While emphasizing grasping the appropriate amount of feeding, the farmer should pay more attention to stable feeding. Quantity, accurate, quantitative feeding. During the high temperature period, it is forbidden to rapidly change the amount of daily feeding in a short period of time. It is not uncommon to see cases of severe consequences caused by drastic changes in the amount of daily feeding. European gluttony, if you increase the amount of daily feed in a short period of time, you are in a state of oversatisfaction in a short period of time, its physical function is not adapted to this state, leading to digestion, absorption and decline in body regulation function, circulation, breathing, Immunity disorders and batch deaths.