Howardian Local Nature Reserve Close Window ~ Horse Chestnut Leaf Miner Cameraria ohridella ~ July 2009 The Horse Chestnut Leaf Miner is the larvae of a Moth (5mm) having up to five generations a year. Cameraria ohridella discovered in Macedonia in 1985 has rapidly spread across Europe and is gaining a foothold in the UK, since its discovery in 2002. There can be many mines on a leaf and this can cause serious defoliation. An Exotic Pest Alert on C. ohridella published June 2003. First found in Cardiff 2006. In 2010 samples of five trees were taken for the Web of Life Cameraria ohridella Survey. Data Cameraria ohridella larva on Horsechestnut leaf Cameraria ohridella pupa in survey envelope Cameraria ohridella in survey envelope Parasitic Eulophid wasps lay eggs in the grubs Howardian Local Nature Reserve Back to top