1Institute of Forest Entomology, Forest Pathology and Forest Protection (IFFF), Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, Vienna (BOKU), Hasenauerstraße 38, A-1190 Vienna, Austria.
2Federal Research and Training Centre for Forests, Natural Hazards and Landscape (BFW), Department of Forest Protection, Seckendorff-Gudent-Weg 8, A-1131 Vienna, Austria.
Email: [email protected]