1. Institute of Genetics, Technical University Braunschweig, Braunschweig, Germany
2. Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden
3. Institute of Forest Protection, Julius Kuehn Institute (JKI), Braunschweig, Germany
4. Institute for Plant Protection in Horticulture and Urban Green, Julius Kuehn Institute (JKI), Braunschweig, Germany