- Chalara dieback of ash is a serious disease of ash trees caused by a fungus called Chalara fraxinea
- It has caused widespread damage to ash populations in continental Europe, including estimated losses of between 60 and 90 per cent of Denmark’s ash trees
- Chalara dieback of ash is particularly destructive of young ash plants, killing them within one growing season of symptoms becoming visible
- Local spread, up to some tens of miles, may be by wind
- Over longer distances the risk of disease spread is most likely to be through the movement of diseased ash plants
You can read more information about the spread of ash dieback disease here.
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