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养殖对虾的主要病害除了常见的黄鳃病、黑鳃病外,近年又发现了新的病种——中国对虾肠道节结病。这种虾病发病急,感染快,死亡量大,且由于虾池清淤不彻底及水质严重污染,形成了恶性循环,发病时间日趋提前,病虾体长越来越短,导致养虾减产越来越严重。例如,1991年舟山市发现中国对虾肠道节结病的时间为8月7日,当时对虾体长约10厘米,1992年发现此病的时间几乎提前一个月,病虾体长仅7厘米左右。以前对这种对虾疾病唯一补救的办法是提高捕捞,即一旦发现病虾马上全池起捕,这样虽可挽回一些损失,但亏损仍很大。因此有些地方的虾农对养虾失去了信心,严重地影响了养虾业的稳定发展。中国对虾肠道节结病的生要症状是,在
The main diseases of shrimp farming in addition to the common gill disease, black gill disease, in recent years has also found a new disease - intestinal shrimp prawn disease. This shrimp disease acute, rapid infection, large amounts of death, and due to incomplete shrimp pond dredging and serious water pollution, forming a vicious cycle, the onset time is getting earlier, sick shrimp shorter and shorter body length, resulting in reduced shrimp production getting more serious. For example, in 1991, Zhoushan City, China found that the prawn gut node was infected on August 7, when the prawn body was about 10 cm long. In 1992, it was found that the disease was almost one month ahead of schedule. The body length of sick shrimp was only about 7 cm . In the past, the only remedy for this kind of shrimp disease was to increase its fishing capacity. That is, once it was discovered that the sick shrimp immediately started to catch the entire pond, this would save some losses but the losses would still be large. Therefore, shrimp farmers in some areas have lost confidence in shrimp farming and have seriously affected the steady development of the shrimp industry. Chinese prawn gut node disease symptoms to be, in