Research in our lab is focused on the ecology and management of exotic and native forest tree diseases, primarily in California ecosystems. In California, millions of trees have died due to P. ramorum infection since the introduction of this pathogen in the mid-1990s. Our study sites span the range of P. ramorum infestation in California, from Big Sur to the Oregon border, and include long-term monitoring plots that encompass a diversity of forest types, including: redwood-tanoak, Douglas-fir-tanoak, coast live oak, and mixed oak woodlands. Across this range, we are studying the ecology of the pathogen and monitoring the establishment, spread and ecological impacts of SOD. We take a multiscale approach, with projects ranging from experimental studies of basic organism biology to landscape-scale field surveys.