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Diagnosis and Management


In this section, you’ll find links to descriptions and photos of Phytophthora ramorum symptoms, a list of currently known host plants, and how to diagnose, treat, and manage the disease.

Symptoms and Diagnosis

Symptoms: An in-depth description of how Sudden Oak Death affects host plants.

Look-alikes & Misdiagnosis: A guide to plant and tree diseases commonly mistaken for Sudden Oak Death.

Diagnosis Guide: Step-by-step guide to diagnosing your plant or tree.

Sampling: Sampling procedures in preparation for lab testing.

Host & Associated Plant Photo Gallery: Extensive list of host plants and photos referenced by scientific and common names.

Treatment and Management

Best Management Practices: Customized BMPs for different user groups, in printable PDF form.

Treatments: Preventive measures that may protect plants.

Arborists & Applicators: List of tree care professionals who have been through a COMTF training.

Native Plant and Tribal Resources: Information about Sudden Oak Death (Phytophthora ramorum) and native plants with an emphasis on those issues concerning tribes.

Sanitation and Reducing Spread: Helpful details and links on sanitation measures to reduce the risk of spreading the pathogen.

P. ramorum in the Urban Interface: List of resources for those who live and work in infested areas along the urban-wildland interface.

P. ramorum in Wildlands: Resources useful when addressing or managing P. ramorum or Sudden Oak Death in forests and wildlands.

P. ramorum in Nurseries: Information for nursery growers and regulators working in nursery environments.