1 DLR Rheinpfalz, Institute of Plant Protection, Neustadt an der Weinstrasse, Germany, and Laboratory of Plant Molecular Physiology, Biotechnology Center of Borj Cedria, PB 901, 2050 Hammam-Lif, Tunisia.
2 Plant Pathology Laboratory, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium.
3 Instituto Valenciano de Investigaciones Agrarias, 46113 Moncada, Valencia, Spain.
4 DLR Rheinpfalz, Institute of Plant Protection, Neustadt an der Weinstrasse, Germany.