对重庆地区的蓝莓园叶枯病进行调查,对发病叶片进行分离、培养,通过菌落形态、生理生化和16S r DNA遗传分析鉴定到一株Bacillus cereus;将B.cereus针刺回接蓝莓幼苗,观察幼苗发病情况和测定植株中氧化保护酶SOD、POD和CAT活力。结果表明蓝莓叶片病斑变大,叶片枯黄,植株死亡;B.Cereus能提高发病植株叶片中氧化保护酶活力。研究表明B.cereus能引发蓝莓叶枯病。 To investigate the blueberry blight in Chongqing area, the diseased leaves were isolated and cultured, and a Bacillus cereus was identified by colony morphology, physiological and biochemical and 16S r DNA genetic analysis. Observation of seedling incidence and determination of plant antioxidant enzymes SOD, POD and CAT activity. The results showed that the blue spot of leaves was bigger, the leaves were yellow and the plants died. B.Cereus could increase the activity of oxidative protective enzymes in the leaves of diseased plants. Research shows that B.cereus can cause blueberry leaf blight.