Proceedings of the sudden oak death sixth science symposium

Abstract

The Sudden Oak Death Sixth Science Symposium provided a forum for current research on sudden oak death, caused by the exotic quarantine pathogen Phytophthora ramorum. More than 50 submissions describing papers or posters on the following sudden oak death/P. ramorum topics are included: biology, genetics, nursery and wildland management, monitoring, and ecology. Abstracts are also provided from a special session on Phytophthoras in California native plant nurseries and restoration sites.

Titles contained within Proceedings of the sudden oak death sixth science symposium

• Slowing spread of sudden oak death in Oregon forests, 2001–2015
• Lessons from 15 years of monitoring sudden oak death and forest dynamics in California forests
• Phytophthora ramorum: update On the impact and wider consequences of the epidemic in Britain
• Resilience of diversity-disease risk interactions following wildfire disturbance
• Effects of diversity, topography, and interannual climate variability on pathogen spillover
• Collaboratively managing sudden oak death using tangible geospatial modeling
• How well has the spread of sudden oak death been predicted by the models in northern California?
• Lessons learned from the USDA Forest Service, Pacific Southwest Region, sudden oak death management program
• Conditions 10 years after sudden oak death suppression treatments in Humboldt County, California
• Reducing CO₂ emissions by managing for sudden oak death...is it possible?
• Restoration of Mount Tamalpais forests destroyed by the sudden oak death pathogen
• Managing sudden oak death on federal lands in southwest Oregon: triumphs and challenges
• Long-term monitoring of sudden oak death in Marin County and the East Bay Hills
• Novel interactions between wildfire and sudden oak death influence sexual and asexual regeneration in coast redwood forests
• Vibrational spectroscopy-based chemometrics to map host resistance to sudden oak death
• Urban activities influence on Phytophthora species diversity in British Columbia, Canada
• A polyphasic approach to gaining insights into causes of acute oak decline in Britain
• Monitoring for pests and diseases in native oak woodlands: the case of acute oak decline in the United Kingdom
• Transcriptome analysis of tanoak reveals divergent mechanisms of innate and phosphite-induced resistance to Phytophthora ramorum
• Host-induced genome alterations in Phytophthora ramorum, I. NA1 lineage on coast live oak in California, II. EU1 lineage on Chamaecyparis lawsoniana in UK
• Analysis of populations of the sudden oak death pathogen in Oregon forests
• Biological differences between the evolutionary lineages within Phytophthora ramorum and Phytophthora lateralis: Should the lineages be formally taxonomically designated?
• Managing Phytophthora ramorum at Bloedel Reserve
• Hot spots of Phytophthora in commercial nurseries
• Pilot program (proof of concept) to mitigate Phytophthora ramorum at an infested nursery based on a systems approach
• Incubation of Phytophthora ramorum-infested leaf debris in soil affects survival, sporulation capacity, and subsequent risk of epidemic development within nurseries
• Relative heat sensitivities of certain Phytophthora spp. and the potential for soil solarization to disinfest nursery beds in West Coast states
• An update on Phytophthora species in California native plant nurseries and restoration areas
• Restoration outplantings of nursery-origin Californian flora are heavily infested with Phytophthora
• Testing and implementing methods for managing Phytophthora root diseases in California native habitats and restoration sites
• Steam, solarization, and tons of prevention: the San Francisco Public Utilities Commission's fight to contain Phytophthoras in San Francisco Bay area restoration sites
• 31 flavors to 50 shades of grey: battling Phytophthoras in native habitats managed by the Santa Clara Valley Water District
• The Golden Gate National Parks Phytophthora response plan
• Phytophthora ramorum and Phytophthora gonapodyides differently colonize and contribute to decay of California bay laurel (Umbellularia californica) leaf litter in stream ecosystems
• Determining the amount of soilborne inoculum of Phytophthora ramorum within an Oregon tanoak forest
• Rhododendron leaf baiting of coastal California watersheds for Phytophthora
• Microsatellite analysis of the EU1 lineage of Phytophthora ramorum in Washington state nurseries, landscapes, and waterways
• How do we know if plants in our nursery have Phytophthora? Detection methods and an integrated approach to monitoring
• Next generation sequencing of oomycete communities in nursery irrigation water
• Monitoring streams and stormwater ponds for early detection of oomycete plant pathogens in western Washington, a citizen science project
• Testing biological control agents for suppression of Phytophthora ramorum in potting mixes in a simulated nursery environment
• Development of a predictive model to estimate the effect of soil solarization on survival of soilborne inoculum of Phytophthora ramorum and Phytophthora pini
• CALINVASIVES: a revolutionary tool to monitor invasive threats
• Validation of the bait test with Rhododendron leaves for Phytophthora diagnosis
• Diversity of foliar Phytophthora species on Rhododendron in Oregon nurseries
• Development of reagents for immunoassay of Phytophthora ramorum in nursery water samples
• Sentinel plant monitoring of Phytophthora ramorum at a research nursery over a six-year-period indicates limited aerial pathogen spread
• Management of foliar infection of Rhododendron by Phytophthora ramorum with film forming polymers and surfactants
• Soil moisture and temperature conditions affect survival and sporulation capacity of Rhododendron leaf disks infested with Phytophthora ramorum
• Identification of five new hosts of Phytophthora ramorum in an infested forest in California
• Host range determination and fungicide resistance assessment of Phytophthora lateralis isolates from horticultural nurseries in Oregon
• Thermal inactivation of infested plants, nursery equipment, and soil is a management option for the treatment of Phytophthora ramorum, causal agent of sudden oak death
• Research on the quarantine pathogen Phytophthora ramorum at the National Ornamentals Research Site at Dominican University of California
• Potential susceptibility of Canadian flora to EU2 lineage of Phytophthora ramorum
• Interaction of Trichoderma asperellum with Phytophthora ramorum inoculum soil populations and enzyme secretion
• Solarization of reused pots is an inexpensive and efficient method to eliminate Phytophthora cactorum and other serious soilborne Phytophthora spp. found in production nurseries
• The effect of moisture on infection of Rhododendron 'Cunningham's White' and Viburnum tinus by zoospores of Phytophthora ramorum
• This tree is not big enough for the both of us: symptoms of Phytophthora ramorum on California bay laurel are lower when insect herbivores are abundant
• Longevity of active Phytophthora ramorum in terminal tree hosts following the removal of primary sporulating hosts
• Resequencing of the Phytophthora ramorum genome to characterize genetic variation and population dynamics of the invasive pathogen

Citation

Frankel, Susan J.; Harrell, Katharine M., tech. coords. 2017. Proceedings of the sudden oak death sixth science symposium. Gen. Tech. Rep. GTR-PSW-255. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 106 p.