The Phytophthora diseases of stone fruit trees in Greece

Phytophthora collar and crown rots are serious soilborne diseases which for a long time have caused considerable losses in stone fruit orchards in Greece. A number of Phytophthora species are notorious for being the cause of crown and root rots in Greek stone trees, including P. cactorum, P. citricola, P. cryptogea, P. drechsleri, P. nicotianae, P. citrophthora, P. syringae and P. megasperma. The most important Phytophthora species is P. cactorum, while P. syringae and P. citrophthora may be locally significant. The economic consequences from death of peach trees and yield losses caused by this disease in Imathia County are serious.