Ash dieback is caused by a fungus (Hymenoscyphus fraxineus) originating from Asia, that infects Ash trees of all ages. The younger trees succumb to the disease faster, but all the affected trees eventually start showing symptoms. The European ash species (Fraxinus excelsior), is devastated by the disease because the  species does not have any natural defense against the fungus, which is known in Europe and UK for 30 years but it was not described until in 2006.  Early symptoms are dark patches, discoloration to black and premature shedding of leaves. The trees also develop dark brown lesions in the shape … Continue reading 95% Of The Ash Trees May Die By 2030 In The UK