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烟草炭疽病(Colletotrichum nicotianaeAverna)是烟草苗期的一种主要病害,成株发病较轻,这种病害1922年首先报道于巴西,以后世界各产烟草国家都有报道。我国各烟区均有此病,尤以河南为害最重,对生产威胁很大。为了解在我国烟区的烟草炭疽病菌,在形态、生理上与国外有无差异,及报道不多的有关该菌对营养元素和各种化学药剂的反映,我们进行了观察研究。一、病原菌的自然形态和培养特征的观察(一)自然形态菌丝有分隔、分枝,初无色,随着菌龄的增长,菌丝逐渐粗壮,内含大量的原生质粒,色变暗,在寄主的表皮组织下可形成子座组织,
Tobacco anthracnose (Colletotrichum nicotianaeAverna) is a tobacco seedling of a major disease, the incidence of mild adult plant, the disease was first reported in Brazil in 1922, after the world’s tobacco producing countries have been reported. All tobacco-growing areas in China have this disease, especially in Henan, which is the most harmful and threatens the production. In order to understand the anthrax of tobacco in China’s tobacco area, morphologically and physiologically with foreign differences, and little reported about the bacteria on the nutrients and various chemical agents, we conducted an observational study. First, the observation of the natural morphological characteristics of the pathogenic bacteria and culture characteristics (a) of the natural morphology hyphae separation, branching, early colorless, with the growth of bacteria, mycelium gradually stout, contains a large number of primary plasmid, dark color , In the host’s epidermal tissue can form sub-tissue,