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池塘养殖的河蟹在生长过程中,有时在头胸甲和腹肢上长出毛状物,此时,河蟹行动迟缓、食欲不振、呼吸困难、螯足不夹人,甚至不能脱壳,最终死亡。如不及时防治,会造成极大的经济损失。河蟹“长毛”,主要是河蟹患病所致。河蟹患哪些疾病会出现“长毛”现象呢?“长毛”后又该如何防
Crab farming ponds in the growth process, and sometimes grow hairy in the head and chest and abdominal, at this time, the river crab slow action, loss of appetite, difficulty breathing, chelating feet without people, or even shelling, and ultimately death . If not prevented in time, will cause great economic losses. Crab “hairy”, mainly due to sick crabs. Which diseases of river crab suffer from “hairy” phenomenon?