引起水稻颖壳褐斑病的两种蠕孢菌分离鉴定

Identification of pathogens causing brown spot disease on rice glume

水稻(Oryza sativa)是我国重要的粮食作物,穗部特别是颖壳病害可严重影响其质量和产量。已报道的水稻穗部病害有稻粒黑粉病菌(Tilletia horrida)引起的稻黑粉病^([1])、稻平脐蠕孢(Bipolaris oryzae)引起的胡麻斑病^([2])、稻曲病菌(Ustilaginoidea virens)引起的稻曲病^([3])、禾谷镰孢菌(Fusarium graminearum)、稻黑孢菌(Nigrospora oryzae).

Brown spots on rice glumes cause withered seeds and yield loss.The rice seeds with brown spot disease were collected from the field of China Agricultural University experimental station in Beijing.Exserohilum rostratum and Bipolaris zeicola were identified as the pathogens which cause brown spot disease based on morphological and molecular characteristics and their pathogenicity.