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Subject: The invasive horse chestnut leafminer, Cameraria ohridella Deschka and Dimic (Lepidoptera: Gracillariidae), continues spread through Europe
Date posted: May 20, 2003
Source: The Netherlands Entomological Society
Cameraria ohridella is an invasive species of unknown origin that has spread throughout Central and Western Europe since its discovery in Macedonia in 1984. This leafminer prefers the white flowering horse chestnut tree, Aesculus hippocastanum L.( Hippocastanaceae). Larvae feed between the leaf epidermal layers leaving large mines where they eventually pupate. Cameraria ohridella can reach high population densities and completely defoliate trees. This will aesthetically impact streets, parks, and gardens in urban areas and ultimately raise public concern. To date, leaf litter removal appears to be the only practical control method available for this urban pest.

For more about Cameraria ohridella see:

Gilbert, M., A. Svatos, M. Lehmann, S. Bacher. 2003. Spatial patterns and infestation processes in the horse chestnut leafminer Cameraria ohridella: a tale of two cities. The Netherlands Entomological Society 107: 25-37.

Kehrli, P., S. Bacher. 2003. Date of leaf litter removal to prevent emergence of Cameraria ohridella in the following spring. The Netherlands Entomological Society 107: 159-162.