Anthracnose. Puccinia sparangioides: Apply a fungicide in the spring to protect young leaves and twigs of trees usually found with the disease. Anthracnose is a common disease among deciduous trees, especially sycamore, ash and oak. It will change the UK landscape forever and threaten many species which rely on ash. Recent estimates suggest that the disease can kill up to 70% of ash trees. Ash dieback is a devastating tree disease that has the potential to kill up to 95% of ash trees across the UK. How do I know if there are ash trees in my area that are infested with EAB? Ash, genus of 45–65 species of trees or shrubs (family Oleaceae), primarily distributed throughout the Northern Hemisphere. Hymenoscyphus fraxineus is an Ascomycete fungus that causes ash dieback, a chronic fungal disease of ash trees in Europe characterised by leaf loss and crown dieback in infected trees. Several species are valuable for their timber and beauty. A large proportion of England’s Ash trees, including Sheffield’s 250,000, are at risk from Ash Dieback, an infectious Asian tree disease sweeping across the country. Yellows It also affects shrubs such as privet. It causes unsightly dark, sunken lesions on leaves, stems, flowers and fruits. The highly infectious, incurable disease which only affects Ash trees, is spreading rapidly … The spores formed on ash blow to and infect Spartina (cordgrass) in salt marshes where the fungus overwinters. If you have ash trees in land under your control, it is your responsibility to act now. image caption Ash trees make up 60% of trees in Northern Ireland's hedgerows The Woodland Trust says it expects virtually all native ash trees to succumb to a fatal tree disease. An ash tree that is not healthy due to disease or insects, has poor shape or structural damage, is otherwise unattractive, or is in a bad location (e.g., near a power line) is of lower value. 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2020 ash tree disease