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5.小瓜虫病(1)病因及症状:病原体为小瓜虫。小瓜虫寄生处容易形成白点,肉眼可以看见,故该病又称白点病。严重时,全身各处遍布小白点,同时伴有大量粘液,病鱼体色发黑,消瘦,游动不正常。可以通过显微镜检查,镜下可以发现有马蹄形的圆球,即可判断为小瓜虫。(2)防治方法:①养殖池使
5. Small melon worm disease (1) causes and symptoms: the pathogen is melon. Small melon parasites at the formation of white spots easily visible to the naked eye, so the disease, also known as white spot disease. Seriously, the whole body throughout the white spots, accompanied by a large number of mucus, diseased fish body color black, thin, swimming is not normal. Microscope examination can be found under the mirror can be horseshoe-shaped ball, you can determine the small melon insects. (2) prevention and treatment methods: ① ponds to make