Taxonomy

Phytophthora ramorum

Distribution

Status

Conservation status

Not Assessed

First reported in the wild

2002

Invasiveness

Invasive species - risk of High Impact

Irish status

Established

Introduction pathways - 1

Transport Contaminant

Introduction pathways subclass - 1

Parasites on plants

Invasive score

23

NAPRA Ireland risk assessed

No

Species Biology

Identification

Causes cankers on tree trunks and die back of leaves.

Ecology

Likely to impact on commercial forestry and native oak species if allowed to establish and spread in Ireland.

Habitat

Woodland, forest and other wooded land

Pathway and vector description

Likely introduced on nursery plants, most likely Rhododendron or Viburnum based on plant testing (Brennan et al., 2008). Monitoring and eradication program is in place to prevent further spread.

Mechanism of impact

Disease transmission

Habitat description

Found on trees, particularly woody ornamentals.

Species group

Other

Native region

Unknown

Distribution

World distribution(GBIF)

Irish distribution

Established - Restricted distribution. Mainly recorded on Rhododendron and Viburnum spp, it has also been recorded on Japanese larch. Of the 4000 samples collected between 2003 and 2007 percentage occurrence was: 8% (2003); 2% (2004); 19% (2005); 10% (2006); and 16% (2007) (Brennan et al., 2008).

Native distribution

Species was only described in 2001.

Temporal change

Date of first record category

2001-2010

Fifty year date category

2001-2050

Records submitted to Data Centre in 2024

The following map is interactive. If you would prefer to view it full screen then click here.

How can you help

Report any sightings to the National Biodiversity Data Centre.

References

Publications

Brennan J, Cummins D, Kearney S, Choiseul J, Cahalane G, & Nolan S (2008) Investigating the threat of Phytophthora ramorum to Ireland; the current situation. Phytopathology 98(6 suppl.), S25 EPPO (2015) PQR - EPPO database on quarantine pest [Online]

European and Mediterranean Plant Protection Organisation

CABI Datasheet