'Candidatus Phytoplasma ulmi'(PHYPUL)
Distribution details in France
Current pest situation evaluated by EPPO on the basis of information dated
2009: Present, restricted distribution
Although 'elm yellows' observed in North America and Europe present different symptoms and disease severity, the phytoplasmas associated with them are very closely related (if not belonging to the same species).
EPPO Reporting Service (495/03) of 1988: according to Dr Morvan (INRA, Montfavet FR) witches' broom symptoms on elms have been known in France for some time. A strain is maintained in culture in Vinca sp. at Versailles.
EPPO Reporting Service (2009/217) : 1 strain was isolated on U. minor near Avignon in the 1990s. Surveys conducted in 1998-2000 showed that symptoms of elm yellows were quite frequent in the elm conservatories of Nogent-sur-Vernisson (Loiret, region Centre) and Guémené-Penfao (Loire-Atlantique, region Pays de la Loire), where approximately 30% of the trees observed were mildly symptomatic. In addition, ‘Ca. Phytoplasma ulmi’ was detected in a small number of samples collected from symptomatic elm trees in Loire-Atlantique, Franche-Comté (U. glabra), and Basse Normandie (U.minor)
EPPO Reporting Service (495/03) of 1988: according to Dr Morvan (INRA, Montfavet FR) witches' broom symptoms on elms have been known in France for some time. A strain is maintained in culture in Vinca sp. at Versailles.
EPPO Reporting Service (2009/217) : 1 strain was isolated on U. minor near Avignon in the 1990s. Surveys conducted in 1998-2000 showed that symptoms of elm yellows were quite frequent in the elm conservatories of Nogent-sur-Vernisson (Loiret, region Centre) and Guémené-Penfao (Loire-Atlantique, region Pays de la Loire), where approximately 30% of the trees observed were mildly symptomatic. In addition, ‘Ca. Phytoplasma ulmi’ was detected in a small number of samples collected from symptomatic elm trees in Loire-Atlantique, Franche-Comté (U. glabra), and Basse Normandie (U.minor)
* Boudon-Padieu E, Larrue J, Clair D, Hourdel J, Jeanneau A, Sforza R, Collin E (2004) Detection and prophylaxis of Elm Yellows phytoplasma in France. Investigación Agraria: Sistema y Recursos Forestales 13(1), 71-80. http://www.inia.es/gcontrec/pub/071-080-(08)-Detection_1161943300187.pdf
* Personal communication with Dr Morvan (INRA, Montfavet, France), 1988.
* Personal communication with Dr Morvan (INRA, Montfavet, France), 1988.
| Country | State | Status | |
|---|---|---|---|
| Belgium | Present, few occurrences | ||
| Germany | Present, widespread | ||
| Italy | Present, restricted distribution |