Neil will talk about the process of introducing an exotic species for classical biological control of non-native invasive tree pests in England. Neil will use the recent release of a parasitoid wasp for the management of Oriental Chestnut Gall Wasp, and preparing for the management of Emerald Ash Borer in the event of its arrival in the UK, as examples.

In this talk, we will discuss how we detect plant viruses and historical work on UK tree viruses and what is being done to better understand the risks these viruses pose to UK trees.

This talk will take a look at past outbreaks as well as some current issues and a look to potential future threat to tree health.

In the light of climate change and the growing problem of tree diseases John discusses the need for expanding the range of trees used in amenity, woodland and forestry settings in the UK.