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orchid anthracnose
兰花炭疽病
又称黑斑病,褐斑病,主要危害叶片,也可危害茎部,是兰花常见的重要病害。该病不仅严重阻碍兰花生长,还严重影响观赏价值,特别是一些以观叶为主的叶艺品种。
引起
兰花炭疽病
的病原菌为兰刺孢菌,以菌丝在病叶或土壤中越冬,由病株和带菌土壤传播,一般经伤口侵入。病菌分生孢子在11-38度的气温下均可萌发,温度22-28度、相对湿度95%以上时为最适宜,借风雨传播。通风不良,高温高湿,连续阴雨条件下利与病菌的传播蔓延。盆土过湿,叶面喷水过度,兰株放置过密,均可感染发病。