EPPO Global Database

Phytophthora ramorum(PHYTRA)

Distribution details in United States of America (California)

Current pest situation evaluated by EPPO on the basis of information dated 2014: Present, restricted distribution
From CABI Disease map 978 (2013): Present, restricted distribution
According to NAPPO Newsletter Sep 2002, found in 12 counties.

EPPO Reporting Service (2003/037) : further details.

EPPO Reporting Service (2004/053) : found in a nursery in Los Angeles county, in a dry area not near any source of infection.

EPPO Reporting Service (2005/160) : 55 infested sites in California in 2005.

EPPO Reporting Service (2011/003) : detected in a single Abies magnifica tree (in Christmas tree plantation), near infested Umbellularia californica.

EPPO Reporting Service (2014/015) : detected on Cinnamomum camphora (urban trees in Mill Valley, Marin county - nursery trees in Sacramento county).

EPPO Reporting Service (2020/210) : on native Arctostaphylos species.
* Chastagner GA, Riley KL (2010) First report of Phytophthora ramorum infecting California red fir in California. Plant Disease 94(9), p 1170.

* 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.

* Garbelotto M, Barbosa D, Mehl H, Rizzo DM (2014) First report of the NA2 lineage of Phytophthora ramorum from an ornamental Rhododendron in the interior of California. Plant Disease 98(6), 849-850.

NAPPO Phytosanitary Alert System
- News Stories: Sudden Oak Death (Phytophthora ramorum) detected in five Georgia Nurseries & Sudden Oak Death (Phytophthora ramorum) discovered in three Florida nurseries (2004-04-14 & 2004-04-05). http://www.pestalert.org
- Official Pest Reports - Sudden Oak Death Syndrome in California Nurseries (2004-03-17).

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

* Rooney-Latham S, Honeycutt E, Ochoa J, Grünwald NJ, Blomquist CL (2013) First report of camphor tree (Cinnamomum camphora) as a host of Phytophthora ramorum. Plant Disease 97(10), 1377-1378.
------- On Cinnamomum camphora.

* Rooney-Latham S, Blomquist CL, Soriano MC, Uhler M (2020) First report of Phytophthora ramorum causing foliar and stem blight of two California native Arctostaphylos species, A. viridissima and A. glauca. Plant Disease. https://doi.org/10.1094/PDIS-07-19-1359-PDN
------- on native Arctostaphylos species.
Situation in neighbouring countries
Country State Status
Canada British Columbia Present, few occurrences view...
Canada Present, few occurrences view...