MySheen

Control measures of White spot Syndrome of cultured Penaeus vannamei

Published: 2024-11-25 Author: mysheen
Last Updated: 2024/11/25, 1. Main symptoms. Diseased shrimp anorexia, reduced or stopped feeding, diseased shrimp empty stomach, slow movement, weak bouncing, lying still or abnormal swimming; in the later stage of the disease, white spots appeared in the subcutaneous carapace and appendages of shrimp, and carapace softening was also common, and the head and chest nail was easy to peel.

1. Main symptoms.

In the later stage of the disease, white spots appeared in the subcutaneous carapace and appendages of the shrimp, and the softening of the carapace was also more common. the head and chest carapace was easy to peel off, the shell was separated from the dermis, and the body color was dark or reddish. The hepatopancreas is brownish yellow and fragile. The disease is fulminant and the mortality is high.

2. Prevention and control methods.

① chooses and buys disease-free shrimp seedlings.

② adds "Xianbikang" to the feed all the year round and bioactive substances containing nucleosides, amino acids, peptides, enzymes and sugars, such as "Baogantai", "Xiankang Su" and so on. The main function is to stimulate the immune system of shrimp and stimulate the phagocytosis of macrophages in the body so as to improve the ability of disease resistance. It is helpful for shrimp enzyme system to adapt to the changes of internal and external environment and enhance the anti-stress ability of shrimp. Repair the damage of hepatopancreas caused by virus infection and restore the vitality of hepatocytes.

During the epidemic season of ③ disease, sprinkle 75,150kg / ha of raw lime water or "strong disinfectant water" every 15 days, or sprinkle it once a week with "shrimp disinfectant", "white shrimp methotrexate" and "Baoxiangding" in the whole pond to adjust the water quality.

In the whole culture cycle, ④ often sprinkles "Lvshuibao", "live water bacteria", "compound photosynthetic bacteria", "Shuangshuibao" and so on to regulate the water quality.

 
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