Ash Dieback
What Is Ash Dieback?
Ash dieback (also known as Hymenoscyphus fraxineus) is a serious disease affecting ash trees across the UK. It’s caused by a fungal pathogen that attacks the tree’s leaves, branches, and trunk often leading to dieback of the crown, and in many cases, the death of the tree.
It was introduced to Europe about thirty years ago where it began to decimate our native Ash population, which has no natural defense against it. It is going to have a massive impact on our flora and fauna. The Ash dieback fungus wasn’t formally described until 2006, but is thought to have been around for some time before the symptoms became apparent. In the UK, ash dieback has had the most impact in the south-east of England although there is evidence of the disease throughout the U.K.
Signs of Ash Dieback
Ash dieback can affect Ash trees of all ages. Younger trees succumb to the disease quicker but in general, all affected trees will have these symptoms:
- In the summer there will be a noticeable change in the leaves, which will develop dark patches and may then shrivel and discolour to brown/black.
- Lesions spots and cankers can appear on the bark. These are often diamond-shaped and dark brown/black.
- Inner bark looks brownish-grey under the lesions.
- New growth will appear from previously dormant buds further down the trunk. This is known as epicormic growth and is a common response to stress in trees.
Why It’s a Problem
Ash dieback weakens the structure of the tree, making it more likely to shed branches or collapse entirely posing a serious risk to people and property. Infected trees near roads, paths, or buildings may need urgent attention.
What Can Be Done?
While there’s currently no cure for ash dieback, affected trees can sometimes be managed with careful pruning. In severe cases, removal may be necessary especially if the tree is unsafe. We can:
- Assess the health and stability of your ash trees
- Advise on the best course of action
- Safely remove dangerous trees if required
- Handle all necessary permissions (e.g., for protected trees)
The whole process from start to finish was efficient and helpful. The team carrying out the work were polite and extremely friendly. They were organised, efficient and cleaned up after themselves leaving my garden clean and tidy.
Anita
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