Four Phytophthora species, P. citricola, P. megasperma, P. quercina and P. syringae, were isolated during
a systematic survey of oak forests (Quercus cerris and Q. robur) in Tuscany (central Italy), and in the Po Valley and
the Venetian Plain (northern Italy) from 22 out of 54 soil samples. The main morphological characteristics of the
isolates and their growth rates on different substrates and at different temperatures are reported
