Ash dieback regulations, information and advice for Scotland

Chalara dieback of ash is a serious disease of ash trees caused by a fungus called Hymenoscyphus fraxineus.

The disease causes leaf loss and crown dieback  and is usually fatal in younger trees whereas mortality in older trees is more often associated with the combined impact of root pathogens such as the honey fungus (Armillaria mellea). It has caused widespread damage to ash populations across Europe, and was first discovered in the UK in a Buckinghamshire nursery in February 2012.

Ash dieback is present across Scotland. Management efforts are now focused on mitigating safety risks from diseased trees, while allowing for natural regeneration of potentially disease-tolerant or resistant trees wherever possible.