Family: Gracillariidae       Sub-family: Lithocolletinae 366a     *     Horse Chestnut Leaf-miner     *     Cameraria ohridella Leaf mines on Horse-chestnut, Aesculus hippocastanum. Sept 2011 Wingspan: 8mm. First UK record was in SW London in 2002 Flight time: Probably three generations Food plant: Horse-chestnut (Aesculus hippocastanum). Also Acer spp. Mine: May-October The egg is laid on the upperside, usually near a vein. A small corridor leads to a large, elongate, upperside blotch, usually between veins. Blotch is cinnamon-coloured with a dark centre. Many mines can occur on each leaf, causing serious defoliation N.B. The fungus Guignardia aesculi is very similar and can cause confusion

Horse Chestnut Leaf-miner, Cameraria ohridella
Leaf mine on Horse-chestnut, Aesculus hippocastanum. UK. Sept 2011