Update of the situation of Ceratocystis platani In Switzerland
In Switzerland, the presence of Ceratocystis platani (EPPO A2 List) causing the canker stain of plane was first observed in 1983 in Ticino. C. platani also occurred later in Canton of Vaud (1987) and Canton of Geneva (2001-2003). No symptomatic plants have been observed in Canton of Geneva and Canton of Vaud for at least 10 years and spores of the fungus were last detected in 2009 in Geneva using spore traps.
In Canton of Ticino, C. platani is still present, with a restricted distribution: there are 6 demarcated areas established in Ticino and official measures have been taken with the aim to eradicate C. platani. The demarcated areas consist of infected zones (width of at least 300 m, including all plants known to be infected) and buffer zones of a width of at least 1 km, surrounding the infected zones. In these demarcated areas, a total of 23 newly infected plane trees were removed in winter 2019/2020. A map of the regulated areas in available at https://www4.ti.ch/fileadmin/DFE/DE-SA/fito/Cartine_delimitazione_CCP.pdf. Monitoring is ongoing.
The pest status of Ceratocystis platani in Switzerland is officially declared as: Present, under eradication, only in some parts of the Member State concerned.
Sources
NPPO of Switzerland (2020-06).