A few words about C. fraxinea. Chalara fraxinea is a fungus that kills Ash trees by destroying their leaves. The term most commonly used is Ash dieback. Sapling trees are most vulnerable and older trees tend to survive a few more years.
Signs to look for
Loss of leaf at the crown
Wilting leaves with black/brown discoloration
Whole trees with withered tops
Die back of shoots and twigs
Spores of Chalara fraxinea blow around in the air and can spread up to 20 miles a year. Experts currently remain mildly optimistic that this fungus might still be contained before it starts to produce spores in the Spring.
If you do suspect the disease, and saplings will be the most vulnerable, please contact one of the following Agencies.
Forest Research Tree Health Diagnostic and Advisory Service 01420 23000
Forestry Commission Plant Health Service 0131 314 6414