1. Dipartimento di Scienze Agrarie Alimentari e Ambientali Borgo XX Giugno 74 06121 Perugia Italy
2. Department of Plant Pathology, Physiology and Weed Science Virginia Tech Blacksburg VA USA
3. MAIB‐CIHEAM The Mediterranean Agronomic Institute of Bari via Ceglie 9 – 70010 Valenzano (Bari) Italy