1. Department of Agroecology, Aarhus UniversityFlakkebjerg Research Centre Forgøsvej 1, DK4200 Slagelse Denmark
2. Dipartimento di Scienze Agrarie, Area EntomologiaUniversità di Bologna Bologna Italy
3. Department of Plant Protection, Faculty of Agrobiology and Food ResourcesSlovak Agricultural University Tr. A. Hlinku 2, SK‐949 76 Nitra Slovakia
4. NIRDBS/“Stejarul” Research Centre for Biological Sciences 6 Alexandru cel Bun St. Piatra Neamt 610004 Romania