1. CREA—Council for Agricultural Research and Economics, Research Centre for Olive, Citrus and Tree Fruit, 95024 Acireale, Italy
2. Agrobiotech Soc. Coop. z.i. Blocco Palma I, Stradale Lancia 57, 95121 Catania, Italy
3. The S. Tolkowsky Laboratory, Department of Plant Pathology, The Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel
4. Formerly, Department of Phytosanitary Science and Technologies, University of Catania, 95123 Catania, Italy