1. Institute of Biology, University of Graz, Graz, Styria 8010, Austria
2. Tvärminne Zoological Station, University of Helsinki, Hanko 10900, Finland
3. Laboratory of Entomology, Wageningen University, Wageningen 6700, The Netherlands
4. Institute for Resistance Research and Stress Tolerance, Julius Kühn Institute (JKI) – Federal Research Centre for Cultivated Plants, Quedlinburg 06484, Germany
5. Ecology and Genetics Research Unit, University of Oulu, Oulu 90014, Finland