1. Institute for Epidemiology and Pathogen Diagnostics, Julius Kühn-Institut - Federal Research Centre for Cultivated Plants (JKI); Braunschweig; Germany
2. Institute of Crop Science and Resource Conservation, Soil Science and Soil Ecology, University of Bonn; Bonn; Germany
3. Agrosphere Institute (IBG-3), Forschungszentrum Jülich GmbH; Jülich; Germany