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Horse chestnut leaf-mining moth has spread rapidly across since it was first identified as present in Britain from Wimbledon in 2002. It had probably been present in that area for at least a year before it was discovered. The effect on the appearance of horse chestnut trees in the second half of the summer by the leaf-mining moth can be profound.
Cameraria ohridella (horse chestnut leaf miner). Credit: RHS/Entomology.
Horse chestnut leaf-miner is a small moth with caterpillars that feed inside the leaves, causing brown or white blotch mines to develop between the leaf veins.
It is usually easy to spot trees affected by the leaf-mining moth, especially as the season progresses.
New to Britain in 2002, this moth has become widespread in England and is spreading in Wales. It may spread throughout most of the UK.
Monitoring the long term impact of horse chestnut leaf mining moth on the health of trees is key to understanding this pest. Through citizen science, gardeners can help with this work. Conker Tree Science is monitoring horse chestnut (Aesculus) trees for the presence of leaf-miner damage and are inviting members of the public to help by sending in their reports.
Apple leaf miner Astrantia leaf miner Beet leaf mining fly Celery leaf mining fly Echinops leaf minerEncouraging moths into your gardenHellebore leaf miner Holly leaf-minerHolm oak leaf-mining mothsHorse chestnut bleeding cankerHorse chestnut leaf blotchHorse chestnut leaf-miner (UK Moths)Laburnum leaf mining moth Lilac leaf mining moth Phytophthora bleeding cankerPyracantha leaf-mining moth Sempervivum leaf minerWinter moth caterpillars
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