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Presentations and Workshops on Phytophthora ramorum

Presentations and workshops are available on a variety of topics related to Sudden Oak Death. Presentations can be downloaded for viewing. Contact Marianne Elliott to arrange a presentation or workshop for your group.

SOD Symptom ID and Nursery Management

A presentation for nursery professionals on recognizing symptoms of P. ramorum on nursery crops and best management practices to minimize the impact of P. ramorum on a nursery. (pdf)

plants in pots with red flagging ribbon tied around them. Many of the leaves show evidence of phytophthora-related lesions.
Symptomatic nursery plants

Life Cycle of P. ramorum as it Relates to Soil and Water

Learn how P. ramorum survives and spreads in soil and water environments. Best management practices for nurseries are also discussed. (pdf)

plants in pots are set on wooden pallets to keep their bottoms dry. White irrigation spigots with sprinkler heads are set up through the slats of the pallets.

Sudden Oak Death and Other Phytophthora Diseases of Rhododendron

Rhododendron is the most important host of P. ramorum in Washington nurseries. Learn how to recognize symptoms of P. ramorum and other Phytophthora diseases of Rhododendron. (pdf)

a cluster of ruffly pink rhododendron flowers. the leaves that can be seen are yellowing.

Sudden Oak Death and other Phytophthora diseases in Washington ecosystems

Sudden Oak Death is devastating California forests, but what about Washington? For those interested in the potential effects of P. ramorum on WA forests, native plants, and implications to trade in forest products. Other Phytophthora species and their role in forest ecosystems will be discussed. (pdf coming soon)

a fern frond. Some of its leaves have arcing brown damage.

Sudden Oak Death, Madrone Canker, and Systemic Acquired Resistance

A not so random grouping of subjects that will interest tree care professionals and others.

a conifer with two boles leaning away from the camera over a lake. the conifer has live foliage, but the bark on its roots has flaked off. Growing with the conifer is a madrone that is large enough it has started to keep the bark on its lower trunk, but the bark on the branches has mostly peeled.

“What’s killing my tree?”

A presentation from the Master Gardener Advanced Education Conference, Sept 22-24 2011, Ocean Shores, WA. Includes information about tree diseases with special sections on SOD and madrone blight.

a clearing in a mixed conifer/broadleaf forest. On the ground is a large amount of twisty dead wood. A large trunk with a jagged top sticks up from the ground in the top left of the frame.
Decaying Oaks killed by P. ramorum

Available Workshops

First Detector Workshops

Sudden Oak Death First Detector workshops are available for interested groups and industry professionals. The purpose of these workshops is to train participants as first detectors in case of P. ramorum being introduced to Washington’s landscape. Master Gardener volunteers and horticultural and natural resource professionals are encouraged to attend a training session.

Managing Phytophthora diseases in the nursery

Phytophthora diseases are very costly to nurseries, and a positive P. ramorum find can have huge economic consequences. At this hands-on workshop, methods for reducing damage by Phytophthora diseases in the nursery will be demonstrated.

To schedule a workshop for your organization, contact Marianne Elliott.

WSU Puyallup Research & Extension Center
2606 West Pioneer, Puyallup, WA, 98371-4998 USA
Last updated 9/24/2025