EPPO Global Database

Hydrocotyle ranunculoides(HYDRA)

Distribution details in United Kingdom

Situation
Current pest situation evaluated by EPPO on the basis of information dated 2006: Present, restricted distribution
First recorded in: 1980s
Comments
EPPO Reporting Service (2004/042) : Alert listing. Since first find in 1980s, recorded at 71 sites by 2001, mainly in south of England Wales, but also in northwest of England.

EPPO Reporting Service (2007/141) : infestation removed at Gillingham in SE England. Eradication not yet confirmed, but the approach has been shown to be successful if rapidly undertaken.
References
* Barker J, Newman J R & Watson R (1997) Genetic diversity in UK populations of Hydrocotyle ranunculoides measured by RAPD and AFLP analysis. Internal Report Long Ashton Research Station.

* Kelly A (2006) Removal of invasive floating pennywort Hydrocotyle ranunculoides from Gillingham Marshes, Suffolk, England. Conservation Evidence 3, 52-53.