Horse chestnut canker
This disease was first reported in the UK in the 1970s but was relatively uncommon until around five years ago.
What is horse chestnut canker?
A new strain of horse chestnut canker has seen cases surge across the UK, affecting trees of all ages and spanning from the south of England to the north and Scotland.
- Extensive bleeding areas on tree stems
- Occasional bleeding areas on scaffold branches
- Linked to a bacterium species known as Pseudomonas syringae pv. aesculi
- Mild winters and wet springs perhaps worsened symptoms in recent years
- Large, mature trees can be disfigured by the disease
- In severe cases large old trees can die
- Younger trees are at greater risk and can die within 3-5 years
If you think you’ve spotted this disease please inform the Forestry Commission using the Tree Alert reporting tool. Three good-quality digital photographs are required to aid identification.
For more information visit the Forestry Commission.