[1
]Dipartimento di Arboricoltura, Botanica e Patologia Vegetale (ArBoPaVe), Università
di Napoli Federico II, Portici, Napoli, Italy 80138; email:
[2
]Department of Horticultural Sciences, New York State Agricultural Experiment Station,
Cornell University, Geneva, New York 14456; email:
[3
]Centro Hispano-Luso de Investigaciones Agrarias (CIALE) Departamento de Microbiología
y Genética, Universidad de Salamanca, Campus de Villamayor, Salamanca, Spain 37008;
email: