Skip to main content Skip to navigation
Washington State University
WSU Puyallup Ornamental Plant Pathology

Pacific Madrone Research Projects


Research is important to maintain the health and sustainability of Pacific madrone in the Pacific Northwest. More resources and information about the importance and threats of this species are available here.

See below for more information about the projects and focus areas of our program. Contact us if you are interested in contributing or collaborating.

You can also join the Arbutus ARME to learn more about the opportunities to contribute to research as citizen scientists.





  • Identifying methods of propagating and transplanting madrone seedlings. More information about propagation is available here.


  • Phytophthora
    • Searching for resistance to Phytophthora cinnamomi root disease
    • Investigating the variation in susceptibility to Phytophthora ramorum infection from a range-wide collection of Pacific madrone seedlings
  • Surveillance for additional foliar pathogens of madrone
  • Madrone leaf blight
    • Screening for resistance to Phacidiopycnis washingtonensis, the cause of leaf blight
    • Identifying environmental conditions that promote infection and disease expression of P. washingtonensis

Citizen Science

  • Join the Arbutus ARME to learn more about the opportunities to contribute to research.

Research Outcomes