瘟病是杂种美人蕉(大花美人蕉Canna×genearlis和兰花美人蕉C.×Orchiodes的一种重要病害。其病原鉴定为Pyricularia chnnaecola llashioka.在广州地区,该病每年6月至9月高温高湿病害最严重,连续降雨或刮台风更利于病害的流行。防治措施:病害初发期及早将病叶清理干净,交替喷40％灭病威1000ppm、70％甲基托布津1000ppm、75％百菌清1000ppm或30％稻瘟灵1000ppm液,每隔7天喷一次,连续喷三次,可以有效地抑制病害。 Blast is an important disease of hybrid canna (Canna × genearlis and C. × Orchiodes), and its pathogen is identified as Pyricularia chnnaecola llashioka. In Guangzhou, the disease is most severe in June and September every year due to high temperature and humidity , Continuous rainfall or typhoon is more conducive to the epidemic. Prevention and treatment measures: early disease disease will be cleaned up the diseased leaves, alternating spray 40% off sick Granville 1000ppm, 70% thiophanate-methyl 1000ppm, 75% chlorothalonil 1000ppm or 30% rice blast of 1000ppm liquid, spray once every 7 days, spraying three times in a row, can effectively inhibit the disease.