Prevention and Control Measures for White Spot Syndrome in Whiteleg Shrimp Farming

1. Main symptoms.

Sick shrimp lose appetite, reduce or stop feeding, have empty stomachs, move sluggishly, jump weakly, lie still or swim abnormally; in the late stage of the disease, white spots appear on the subcutaneous shell and appendages of the shrimp body, softening of the shell is also common, the carapace is easily peeled off, the shell separates from the dermis, and the body color is dark or slightly red. The hepatopancreas is brownish-yellow and fragile. The disease is explosive and has a high mortality rate.

2. Prevention and control methods.

① Purchase disease-free shrimp fry.

② Year-round, add “Shabikang” and biologically active substances containing nucleosides, amino acids, polypeptides, enzymes and glycosides to the feed, such as “Baogantai”, “Shakangsu”, etc. The main effects are: stimulating the shrimp immune system and activating the phagocytic function of macrophages in the body, improving disease resistance. It helps the shrimp enzyme system adapt to changes in the internal and external environment, enhancing the shrimp's stress resistance. It repairs hepatopancreatic tissue damage caused by viral infection and restores hepatocyte vitality.

③ During the disease epidemic season, splash quicklime water at 75-150 kg/hectare or “Qiangli Xiaodushui” once every 15 days, or use “Xiayong Shaduwei” or “Baixia Mieduling”, “Baoxiading” once a week, splashing the whole pond once to regulate water quality.

④ Throughout the entire farming cycle, frequently splash “Lüshuibao”, “Huoshuijun”, “Compound Photosynthetic Bacteria”, “Shuangshuibao”, etc., to regulate water quality.