根据文献的记载,藤井溥曾发现白叶枯菌菌株之间,有时会有互相抑制的作用,即先受感染的植物体对后侵染的病原菌能产生防御反应;并且这种抑制作用还受品种抗性的影响。在前人工作的基础上,本项研究选用了抗性强和抗性弱的三个水稻品种,用致病力不同的菌系作交互接种试验,以研究交叉保护(以下简称交保)的实际效果。材料和方法 According to the records of the literature, Fujii Pu has found that among the strains of B.cereus, sometimes there is a suppressive effect on each other, that is, the first infected plant can produce a defensive response to the pathogen after infection; and this inhibition is also affected Variety resistance effects. Based on the previous work, three rice cultivars with strong resistance and weak resistance were selected in this study. Cross-vaccination experiments were conducted with different strains of pathogenicity to study the actuality of cross protection (hereinafter referred to as cross insurance) effect. Materials and Method