Situation of Pseudomonas syringae pv. aesculi in Germany
As reported in EPPO RS 2009/117, the presence of Pseudomonas syringae pv. aesculi (EPPO Alert List) in Germany was confirmed in 2008 in one horse chestnut (Aesculus hippocastanum) tree in Hamburg. The NPPO of Germany recently informed the EPPO Secretariat that the disease has also been detected in Sachsen. Six horse chestnut trees that had been planted in 2008 showed bleeding and bark necrosis. One of the trees has been destroyed for diagnostic purposes, and the remaining five are under supervision. The NPPO of Germany explained that the pest status of P. syringae pv. aesculi in Germany was difficult to describe because the diagnostics for this disease is complex and the presence of the bacterium could only be confirmed in a few cases. Nevertheless, based on this uncertain data, the pest status of Pseudomonas syringae pv. aesculi in Germany is officially declared as: Present, verified only in parts of the area / single cases.
Sources
NPPO of Germany (2011-02).