1. Department of Life Sciences; CRAW; Walloon Agricultural Research Centre; Rue de Liroux 4 Gembloux B-5030 Belgium
2. ILVO; Institute for Agricultural and Fisheries Research; Plant Sciences Unit - Crop Protection; Burgemeester Van Gansberghelaan 96 bus 2 Merelbeke B-9820 Belgium
3. JKI-GF; Julius Kühn-Institut; Federal Research Center for Cultivated Plants; Institute for Plant Protection in Horticulture and Forest; Messeweg 11/12 Braunschweig D-38104 Germany