抄録
A new disease of quince with fruit spots and brown flecks on leaves was found in Aomori. A species of Cylindrosporium was isolated from the fruit spots, and Mycosphaerella type pseudothecia were obtained from overwintered, affected leaves. Single-spore isolates from the pseudothecia produced a Cylindrosporium anamorph on potato dextrose agar. These isolates caused the same spots on quince and apple fruits and the blown flecks on quince leaves in inoculation tests. Based on morphological and cultural characteristics, the fungus was identified as Mycosphaerella pomi (anamorph: Cylindrosporium pomi). This is the first report of M. pomi on quince in Japan.
