EPPO Global Database

Pseudomonas syringae pv. aesculi(PSDMAX)

Distribution details in United Kingdom

Current pest situation evaluated by EPPO on the basis of information dated 2013: Present, restricted distribution
First recorded in: 2003
From CABI Disease map 1093 (2015): Present, widespread
EPPO Reporting Service (2009/117) : occurs in England and Wales, and Scotland. Previous episodes of bleeding cankers of horse chestnut trees had been attributed in the 1970s to a Phytophthora sp. but these bleeding cankers were considered to be uncommon and only seen in the South of England. However, since 2003 an upsurge of the disease has been observed. From 4 cases reported in 2001, 60 were seen in 2003, 90 in 2004, 75 in 2005 and more than 110 were reported in 2006, and from locations as far north as Lancashire (north-west of England), and Glasgow and Fife (Scotland).

Genomic data (Green et al., 2012) suggest that British and Indian strains share a recent common ancestor and that the British strains studied descend from a single, very recent introduction of the bacterium into Britain.
* Green S, Laue BE, Steele H, Sharp PM (2012) Using genomics to gain insights into the evolution and biology of Pseudomonas syringae pv. aesculi on European horse chestnut. Journal of Agricultural Extension and Rural Development 4(9), 214-216.

* Henricot, B. (2009) Plantsman 8 (4), 216-223.

* Mabbett, T. (2007) Forestry & British Timber 36 (9), 16-18, 20, 22-23.

* Mullett, M. S.; Webber, J. F. (2013) Forestry Pathology 43, 371-378

* INTERNET (last retrieved 2009-06)
Forestry Commission (GB). Bleeding canker of horse chestnut. http://www.forestry.gov.uk/fr/INFD-6KYBGV

* Webber JF, Parkinson NM, Rose J, Stanford H, Cook RTA, Elphinstone JG (2008) Isolation and identification of Pseudomonas syringae pv. aesculi causing bleeding canker of horse chestnut in the UK. Plant Pathology 57(2), p 368.