| Birch
Polypore (Piptoporus betulinus) |
| Fruiting
bodies: July – November |
| Area
of infection: trunk |
| Wood
decomposition: brown rot |
| Comment:
This affects only the birch trees. |
| Effect:
Enters through wounds in the trunk and then spreads downward – considerable danger
of breaking. |
| Recommendation:
Tree should be evaluated. More photos. |
