According to Koganezawa and Sakuma (1984), the morphology of the fungus is identical to that of Botryosphaeria dothidea. The sizes of the ascoma, asci and ascospores are variable. Asci are 80-130 x 14-23 µm, and ascospores are 19-26 µm long. The conidia, of the Fusicoccum anamorph, are 23-29 x 6-8 µm. In China, conidia of 10 isolates measured 20.0-31.5 x 4.5-7.0 µm (Lee and Yang, 1984).
Related crop
- Malus
- Pyrus communis
- Pyrus pyrifolia
- Malus domestica
Related invasive species
- Botryosphaeria
- Botryosphaeria berengeriana f.sp. pyricola
- Botryosphaeria dothidea
- Wart bark
- Fusicoccum
Related Farm Practice
- Damage
On Japanese pears [ Pyrus pyrifolia ] (Kato, 1973) and apples [ Malus ] in China (Lee and Yang, 1984), the fungus forms wart-like protuberances (wart bark) on the surface of trunks and branches, rather than typical Botryosphaeria cankers. These are subsequently surrounded by dark-brown spots. Infected twigs eventually wither and die back. Large contoured dark-brown spots are formed on the leaves and the fruits. The warts on trunks and branches damage the tree, reducing its growth and productivity. The leaf spots are of minor importance and do not affect yield.