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烤烟K326品种接种赤星病菌后,用透射电镜进行叶细胞观察及致病机理研究。随接种时间的延长烟叶细胞受损及崩解程度增加,而未接种的叶细胞内各种细胞器正常、完整。在染病前至病菌侵入后细胞病变初期进行化学防治(喷施代森锰锌),效果达100％;接种后36h施药,烟叶出现病斑,施药时间越晚,发病越早,且病情越重,防治效果越差,感病144h后施药与不施药的病情差异不大。
Flue - cured tobacco K326 variety inoculated with the pathogen, TEM observation of leaf cells and pathogenesis. With the prolongation of inoculation time, the damage and disintegration of tobacco cells increased, while the non-inoculated leaf cells in various organelles were normal and complete. In the early stage of infection before disease invasion of bacteria after the initial chemical control (spraying mancozeb), the effect of up to 100%; 36h after inoculation, tobacco leaf spot, the application time later, the onset of the disease, and the more serious , The worse the effect of prevention and treatment, illness after 144h application and no application of the disease is not different.