Sessions Sponsored by the Forest Pathology Committee at the
2008 APS Annual Meeting

The 2008 APS meeting was held July 27-30, in Minneapolis, Minnesota.

In addition to the field trip and special sessions listed below, there were also a forest pathology paper session, and many forest pathology posters.

Forest Pathology Field Trip

7:30 a.m. Friday July 25th – 6:00 p.m. Saturday July 26th
Sponsoring Committee: Forest Pathology
Organizer: Joe O’Brien, USDA Forest Service, NA S&PF, St. Paul, MN
Financial Sponsors: Rainbow TreeCare, S&S Horticulture
Registration Fee: $150

Urban and rural forest tree disease problems will be presented and discussed as participants visit the TRE (Teaching, Research and Extension) Nursery at the University of Minnesota and stops between Minneapolis/St. Paul and Cloquet, MN. An al fresco evening barbecue and program at the Cloquet Forestry Center will cap off the day. Logging history and more tree diseases will be highlighted during the return trip via the St. Croix River Valley. Highlighted diseases will include white pine blister rust, Diplodia shoot blight, butternut canker, and ash yellows/decline.


Potential Impacts of Climate Change on Diseases in Natural Ecosystems: Using History to Predict the Future

Section: Epidemiology/Ecology/Environmental Biology
Organizers: Ned Klopfenstein, USDA Forest Service, Moscow, ID; Bryce Richardson, USDA Forest Service-RMRS, Moscow, ID
Sponsoring Committee: Forest Pathology

Climate change will likely have profound impacts on plant diseases. Natural forests, long-lived trees, and other natural ecosystems provide ideal systems to evaluate and predict effects of climate change on forest disease. Models are being developed to predict host and pathogen distribution based on climatic factors. Baseline information on historical climatic adaptation of hosts and pathogens can be combined with models that project future climate to predict future distribution and behavior of forest diseases. This symposium will address diverse approaches to predict potential impacts of climate change on diseases in natural ecosystems.

Climate change and plant disease in tallgrass prairie. KAREN GARRETT, Kansas State University, Manhattan, KS

Effects of climate change and Alder canker in Alaska. JENNIFER ROHRS-RICHEY, University of Alaska, Fairbanks, AK

Genetic responses to climate change: Comparisons between quantitative and molecular genetics in western white pine. BRYCE RICHARDSON, USDA Forest Service-RMRS, Moscow, ID

Overview: Current state of knowledge and information needs for predicting impacts for climate change on forest disease. JENNIFER JUZWIK, USDA FS, St. Paul, MN

Role of climate in impact of Armillaria root disease in western North America. MEE-SOOK KIM, USDA Forest Service – RMRS, Moscow, ID


If We Had Known Then What We Know Now: Reflections on Catastrophic Tree Diseases

Section: Disease of Plants
Organizer: George Hudler, Cornell University, Ithaca, NY
Sponsoring Committee: Forest Pathology

The establishment and spread of non-native, invasive forest pathogens in the US during the 20th century have changed forest composition, structure, and function in rural and urban landscapes. Because recovery from an invasive pathogen is typically an extremely long-term process, it is especially critical to incorporate lessons from previous invasions by diverse pathogens. Case studies covering historical perspectives on what was done to contain, prevent spread, and mitigate each disease through the century will be presented. This symposium will focus on lessons learned from historical pathogen invasions to improve our response to current and future threats.

Oak wilt. DAVE APPEL, Texas A&M University, College Station, TX

Phytophthora spp. EVERETT HANSEN, Oregon State University, Corvallis, OR

Pitch canker. TOM GORDON, University of California, Davis, CA

White pine blister rust. PAUL ZAMBINO, USDA Forest Service, Moscow, ID