First report of Brenneria goodwinii, Gibbsiella quercinecans and Rahnella victoriana in Switzerland
In Switzerland, Brenneria goodwinii, Gibbsiella quercinecans and Rahnella victoriana were detected for the first time in 2017 in the municipality of Muttenz (Basel-Stadt canton) on 3 sessile oaks (Quercus petraea) exhibiting stem bleeding symptoms. These bacteria have been associated with acute oak decline, a syndrome which was first observed in the United Kingdom. The oak trees were 15-20 years-old and had been imported from Germany in March 2017. On these trees, signs of infestation by Agrilus biguttatus (two spotted oak buprestid) were also observed. Affected trees will be felled, and plant material will be destroyed. Monitoring of surrounding forests will also be carried out.
The pest status of Brenneria goodwinii, Gibbsiella quercinecans and Rahnella victoriana is officially declared as: Present, only in some parts of the Member State concerned
Sources
NPPO of Switzerland (2018-02).