The symposium is organized within the framework of the EU project CONTROCAM, a multidisciplinary research project aimed at the control of the horse chestnut leaf miner, Cameraria ohridella, a moth of unknown origin which has spread recently over vast areas of Europe, causing severe damage to horse chestnut trees, Aesculus hippocastanum, both in urban areas and in natural stands (see www.cameraria.de and our web pages for more details).

In recent years, many independent groups initiated research programmes on various aspects of the biology, ecology, impact and control of the horse chestnut leaf miner in Europe. The objective of this symposium is to evaluate the current state of the art of research on Cameraria ohridella, to estimate the needs for future research and to build up new collaborations.

Beside Cameraria ohridella, other exotic leaf miners recently invaded Europe and became pests of trees, shrubs and orchards, e.g. Phyllonorycter platani on Platanus, Phyllonorycter robiniella and Parectopa robiniella on Robinia, Argyresthia thuiella on Thuja and Chamaecyparis, and the citrus leaf miner, Phyllocnistis citrella. All these invasive species share similar characteristics. Therefore, presentations on these leaf miners are strongly encouraged.

The symposium will cover all possible topics related to Cameraria ohridella and other exotic leaf miners in Europe, such as:

• Biology and ecology
• Impact on host trees, and on urban and natural ecosystems
• Natural enemies and other mortality factors
• Biological, mechanical and chemical control
• Monitoring
• Spread

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