Join the RHS today and support our charitable work
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Free entry to RHS members at selected times »
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Help us achieve our goals
Join the RHS today and support our charity
Horse chestnut leaf-mining moth has spread rapidly across since it was first identified as present in Britain from Wimbledon in 2002. The effect on the appearance of horse chestnut trees in late summer 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 horse chestnut 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.
Horse chestnut trees appear to tolerate the moth and so control is not necessary or in most cases practical.
New to Britain in 2002, this moth has become widespread in England and is spreading in Wales. It may spread throughout most of Britain.
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 miner
Encouraging moths into your garden
Hellebore leaf miner
Holm oak leaf-mining moths
Horse chestnut bleeding canker
Horse chestnut leaf blotch
Horse chestnut leaf-miner (UK Moths)
Laburnum leaf mining moth
Lilac leaf mining moth
Phytophthora bleeding canker
Pyracantha leaf-mining moth
Sempervivum leaf miner
Winter moth caterpillars
the RHS today and get 12 months for the price of 9
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.