1. Agricultural Institute of Slovenia; Plant Protection Department; Ljubljana Slovenia
2. Agroscope; Institut für Pflanzenbauwissenschaften; Waedenswil Switzerland
3. Zurich University of Applied Sciences, School of Life Sciences and Facility Management; Campus Grueental; Waedenswil Switzerland
4. INRA; Center for the Biology and Management of Populations (CBGP), UMR; Montpellier France