1. Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, P.O. Box 102, H-1525 Budapest, Hungary
2. Department for Innovation in Biological, Agro-food and Forest Systems, University of Tuscia, 01100 Viterbo, Italy
3. Institute of Plant Protection, Georgikon Faculty, University of Pannonia, H-8360 Keszthely, Deák F. 56, Hungary
4. Department of Agri-food and Environmental Systems Management, Plant Pathology Section, University of Catania, 95123 Catania, Italy
5. Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, P.O. Box 102, H-1525 Budapest, Hungary. This research was supported by OTKA grants K61107 and K101914