General
General
The horse-chestnut leaf miner, Cameraria ohridella, probably originates from natural stands of the European horse-chestnut in Greece, Albania and Macedonia. It was first observed attacking ornamental horse-chestnut trees in Macedonia in the 1970s, from where it spread to most of Europe. Since then, in all invaded regions, outbreaks have continued unabated, causing aesthetic damage to horse-chestnut, one of the favourite ornamental trees in European cities.