论文部分内容阅读
采用低倍显微镜观察法,对家蚕食下传染和胚种传染的微粒子病蚕的中肠病征及早期诊断做了研究。经对32个家蚕品种试验证实,不论化性、系统、滞育卵与非滞育卵、原种或一代杂交组合,食下感染病原抱子后的第2-3天,都出现特异的黑褐色病斑,并比病原孢子形成时间提早4-6天,可作为食下传染微粒子病蚕的早期诊断法加以利用。本试验证明,胚种传染的微粒子病蚕不存在原发性的中肠病斑。
Low magnification microscope was used to study the pathological features and early diagnosis of the midgut of the silkworm, which is caused by the infection of the silkworm. After 32 varieties of silkworm trials confirmed that, regardless of sex, system, diapause eggs and non-diapause eggs, the original or a cross-generation hybrid combinations, eruption of 2-3 days after infection of pathogen spores, there are specific black Brown spots, and spore formation than the pathogens 4-6 days earlier, can be used as an early diagnosis of foodborne particle pathogenic bacteria to be used. The test shows that embryo-infected microparticles silkworm disease does not exist in the primary midgut lesion.