1. Dept. of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila (Italy)
2. Istituto per la Protezione Sostenibile delle Piante, CNR, Viale P.A. Mattioli 25, 10125 Torino (Italy)
3. Via S. Pietro d' Ollesia 13b, 10053 Bussoleno (Italy)
4. Apto. de correos 6, Caldes de Malavella, 17455 Girona (Spain)
5. Oregon State University, Department of Botany and Plant Pathology, Corvallis, Oregon 97331 (United States)