引起白及叶枯病的一种病原物种类鉴定

Species identification of one pathogen causing leaf blight on Bletilla striata

白及是兰科植物白及[Bletilla striata(Thunb.)Reichb.f.]的干燥块茎,其性微寒,味苦、甘、涩,归肺、肝、胃经,具有收敛止血,消肿生肌的功效,临床上被广泛用于咯血、咳血、消化性溃疡出血等症[1],主要分布于贵州、甘肃、云南、四川和陕西等地。白及花朵色彩鲜艳,形态优美,有白色、蓝色、粉色等多种色调,被誉为“中国洋兰”,因此还是一种极具观赏价值的植物[2]。

Bletilla striata is one of the genuine medicinal materials in Guizhou,and its planting area ranks first in China.In 2022,the leaf blight of Bletilla striata occurred in Guizhou Academy of Agricultural Sciences with a large area and was serious.In this study,the pathogenic fungus was isolated from the leaves with obvious symptoms,which was identified to be Rhizoctonia solani AG1-IB based on the results of morphological identification,ITS sequence analysis,and hyphal anastomosis.To our knowledge,there have been no reports on the isolation of R.solani AG1-IB from Bletilla striata in China as so far.This is the first report and the results will provide theoretical reference for effective control and further research of leaf blight on Bletilla striata.