Chalara ash dieback disease is a fungus which mainly affects the Common Ash tree. Trees affected are increasingly being found across Europe and the UK. The disease has been located widely across the UK, from woodlands, to urban areas and tree nurseries. Spores produced on the fruiting bodies of the Chalara are spread via vectors such as the wind and through fallen leaf litter. The fungus attacks with different intensities and over time can cause loss of leaves, crown dieback of the tree and possible tree death. Emergency strategic measures are currently in place to monitor and prevent the spread of the disease further.