Occurrence and Prevention Methods of Rice Field Eel Diseases

@#@236@#@Rice field eels live year-round in water bodies with complex environmental factors and are frequently attacked by pathogens such as viruses, bacteria and parasites. During the rearing process, sudden changes in water temperature, insufficient dissolved oxygen, excessively high water acidity, and poor feeding management, such as insufficient feed, malnutrition, or feeding rotten and spoiled feed, and deterioration of water quality, disrupt their physiological state, weaken the eel body and lower their resistance, and in severe cases often cause mass death. Even if they do not die, it directly affects the growth and development of the rice field eels. In some cases, it is also due to excessive stocking density, or rough manual handling that injures the eel body. The external environment creates a good breeding ground for pathogens, and pathogens take the opportunity to invade the eel body. There are many causes of eel diseases, which, summed up, are the result of the interaction between the body and the external environment.

Artificial rearing of rice field eels should follow the principles of preventing disease before it occurs, treating disease early, and prioritizing prevention over treatment. To do a good job in disease prevention, there should mainly be a dedicated person responsible for managing the eel pond. Before stocking the eel fry, the eel bodies should be externally disinfected with drugs such as 8-10 mg/kg potassium permanganate and 2%-3% salt water, and each square meter of eel pond should be splashed throughout the pond with 50-100 grams of quicklime water; after 5-7 days, once the drug's effect has dissipated, the eel fry are then put in for stocking. Water quality changes should be carefully observed and the water body environment improved, and this should be handled flexibly according to the tolerance of the eel fry and the water temperature. During inspection, if it is found that the rice field eels in the pond water move rather slowly and show signs of restlessness, they should be taken out of the water for observation and records should be kept; for eel ponds where disease has already occurred, 10 grams of bleaching powder should be dissolved in 5 kg of water and splashed for disinfection. Isolation of diseased eels should be done well to completely prevent the occurrence and spread of eel diseases. If there are sick or dead eels, a pit should be dug to bury them deeply, and they must never be discarded at random, so as to prevent the spread of disease.