EPPO Global Database

Phytophthora ramorum(PHYTRA)

Distribution details in United States of America (Washington)

Current pest situation evaluated by EPPO on the basis of information dated 2022: Absent, pest eradicated
Pest status declared by NPPO: Absent, eradicated (2022-05)
From CABI Disease map 978 (2013): Present, no details
EPPO Reporting Service (2003/079) : found in 4 rhododendrons at one nursery in King's county.

EPPO Reporting Service (2005/160) : 16 infested sites (nurseries) in Washington State in 2005.

From State of Washington, Department of Agriculture (2022): occasionaly found in nurseries, but any infected nursery material is systematically destroyed. Surveys which have been conducted since 2003 confirmed that P. ramorum has never been detected in the natural environment. The pest status of P. ramorum in Washington State is officially declared as 'Absent, eradicated'.
* Dart NL, Chastagner GA (2007) Estimated economic losses associated with the destruction of plants due to Phytophthora ramorum quarantine efforts in Washington State. Plant Health Progress 8(1), 20.
------- Nursery.

* Davidson JM, Werres S, Garbelotto M, Hansen M, Rizzo DM (2003) Sudden oak death and associated diseases caused by Phytophthora ramorum. Plant Health Progress 4(1), 12.

* Elliott M, Rollins L, Bourret T, Chastagner G (2021) First report of leaf blight caused by Phytophthora ramorum on periwinkle (Vinca minor) in Washington State, USA. Plant Disease 105(7), p 2023. https://doi.org/10.1094/PDIS-08-20-1721-PDN

* Elliott M, Rollins L, Bourret T, Chastagner G (2020) First report of leaf blight caused by Phytophthora ramorum on cherry laurel (Prunus laurocerasus) in Washington State, USA. Plant Disease 105(3), p 712. https://doi.org/10.1094/PDIS-07-20-1489-PDN
------- First recorded in 2014 (in a nursery).

NAPPO Pest Alert – Official notifications. Sudden Oak Death (SOD), Phytophthora ramorum, first detection in Washington State – 06/12/2003. http://www.pestalert.org
USDA-APHIS website
- Plant disease caused by Phytophthora ramorum. A national strategic plant for USDA (2005-09-15). http://www.aphis.usda.gov/ppq/ispm/pramorum/pdf_files/usdaprstratplan.pdf
- Pest detection and management programs – Phytophthora ramorum. Program update 2005-11-16. http://www.aphis.usda.gov/ppq/ispm/pramorum/updates/update11-15-05.pdf
California oak mortality task force website. http://nature.berkeley.edu/comtf/html/about_p__ramorum.html

* Oak SW, Hwang J, Jeffers SN, Tkacz BM (2008) General Technical Report - Pacific Southwest Research Station, USDA Forest Service No.PSW-GTR-214, 59-64.

* Prospero, S.; Grunwald, N. J.; Winton, L. M.; Hansen, E. M. (2009) Phytopathology 99 (6), 739-749.
-------- In nurseries.

* State of Washington. Department of Agriculture (2022-05).
------- Absent, eradicated.

Situation in neighbouring countries
Country State Status
Canada Present, few occurrences view...
Canada British Columbia Present, few occurrences view...