The Horse Chestnut Leaf mining moth is spreading rapidly and a lot of trees now have brown and tatty leaves. This moth has been more in evidence over the last few years, but there there is no evidence as yet that damage by the moth leads to a decline in tree health, the development of dieback, or tree death. Trees survive repeated infestations and re-flush normally in the following year. It appears that most of the damage caused by the moth occurs too late in the growing season to greatly affect tree performance.They should come back with fresh leaves as normal in spring. Raking up leaves and destroying them by burning or sealing in a plastic bag until next July (when adult moths would have been hatched) will help on single specimens as there is no-where for pupae to over-winter.
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