银杏叶枯病病原菌形态及分类

THE CHARACTERISTIC FEATURES AND CLASSIFICATION OF GINKGO LEAF BLIGHT PATHOGENS

银杏叶枯病的病原菌有3种。经形态观察、显微计测及培养试验,它们分别是链格孢〔Alternaria alternata (Fr.) Keissl.〕、围小丛壳〔Glomerella cingulata (Stonem.) Spauld.et Schrenk〕和银杏盘多毛孢〔Pestalotia ginkgo Hori〕。链格孢能为害多种木本植物,但侵染银杏,引起叶枯病,尚属首次报道。

According to the results obtained from morphological observation, micrometry and cultural experiments, ginkgo leaf blight is caused by three different parasitic fungi, which are named Alternaria alternata, Glomerella cingulata and Pestalotia ginkgo. Though it is known that Alternaria is often to attack a variety of trees, a leaf blight disease is often to attack a variety of trees, a leaf blight disease of Ginkgo caused byAlternaria alterncta is hitherto not reported.