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对车前草穗枯病症状进行了系统观察,并对其病原菌进行了鉴定。车前草穗枯病主要为害穗部,也为害穗轴和叶片。穗部主要表现为顶端变黑腐烂,后引起全穗枯死;叶片出现圆形、直径1~2 cm大型病斑,病斑中央灰绿色,边缘暗绿色,病叶易发生焦枯;穗轴、叶柄产生椭圆形或梭形大斑,病斑呈暗绿色或灰白色。病部易产生大量黑色小点(子座)。病菌鉴定按柯赫氏法则进行。在成功完成病菌分离、回接及再分离过程的基础上,对病菌的形态及大小进行了观察和测量,结果表明车前草穗枯病病原菌为一种壳梭孢属真菌(Fusicoccumsp.)。
The symptom of plantain blight was systematically observed and the pathogen was identified. Plantain ear blight mainly damage spike, but also for the rachis and leaves. The panicle mainly showed black rot at the top, which caused the whole panicle to die. The leaves appeared round with 1 ~ 2 cm in diameter. The lesions were central gray green with dark green edge, Produce oval or fusiform big spot, dark green or gray spots. Disease prone to produce a large number of black dots (child seat). Germs identified by Koch’s law. Based on the successful completion of the pathogen separation, rewinding and reisolation, the morphology and size of the pathogen were observed and measured. The results showed that the pathogen of plant head blight was a Fusicoccumsp.