First report of Cryphonectria carpinicola in France
The NPPO of France recently informed the EPPO Secretariat of the first finding of Cryphonectria carpinicola (EPPO Alert List) on its territory.
In June 2021 and later in June 2024, C. carpinicola was detected in two forest stands located in north-eastern France (Bourgogne- Franche-Comté region). The fungus was isolated from branches and trunks of Carpinus betulus trees. The identification of the fungus in pure culture was confirmed by the French reference laboratory (Anses LSV, Unité de Mycologie) by morphological identification. In both locations, the pathogen was found in drought-stressed hornbeam stands, confirming it behaves rather as a weak pathogen and does not appear to be a primary pathogen. Both infested stands had 5 to 10% dead or severely declining (i.e. trees with more than 50% of dead branches) hornbeam trees.
The pest status of Cryphonectria carpinicola in France is officially declared as: Present, in specific parts of the country, at low prevalence.
Sources
NPPO of France (2025-03).