Witches' broom gall
Podosphaera phytoptophila and Eriophyes celtis
- Proliferation of small branches and twigs bunched together at the ends of branches
- Clusters of twigs develop from a single point on the branch
- Symptoms are caused by the interaction of a disease and mite
- Damage is most noticeable after leaves have fallen
- More information on Witches' broom gall...