Based on an analysis of publications and author’s own research, it is shown that the south of Russia is a macro-region where the spread of new alien species of plant pathogens is observed, and this process will inevitably continue in the future. Brief information about the findings of several important phytopathogenic fungi previously unknown in Russia but discovered in the south of Russia, is provided. Monitoring the possible spread of newly found dangerous plant pathogens, especially Hymenoscyphus fraxineus (T. Kowalski) Baral, Queloz & Hosoya, which causes ash dieback, and Cryptostroma corticale (Ellis & Everh.) P.H. Greg. & S. Waller, which causes sooty bark disease of maples, is an extremely important task.

T.S. Bulgakov