The publication presents the main results of the current stage of research of alien phytopathogenic fungi that infect trees and shrubs in the Donbass. Based on the results of many years of research, 105 alien species were recorded. Three main groups of alien species can be distinguished among all pathogens of woody plants according to the type of diseases causing a significant deterioration in the vital condition of many arboreal plants species in the Donbass: pathogens causing vascular mycoses (wilting); pathogens causing diseases of leaves or needles; pathogens causing bark necrosis, shoot dieback and cancer diseases. It is critically important to monitor the possible spread of two new dangerous phytopathogenic fungi in the region: Hymenoscyphus fraxineus (T. Kowalski) Baral, Queloz & Hosoya, causing ash dieback, and Cryptostroma corticale (Ellis & Everh.) P.H. Greg. & S. Waller, causing sooty bark disease of maples.

I.V. Bondarenko-Borisova, T.S. Bulgakov