PATHOCOMPLEX OF MICROMYCETES ASSOCIATED WITH BLACKCURRANT CANE DIEBACK

According to the research carried out in 2015–2020 it was found that the main reason why blackcurrant plants die back in Orenburg region is the lesion of roots and canes caused by the fungus Rhizoctonia sp. Fungi of the genus Cytospora (C. grossularia and C. ribes) mainly cause wilting of blackcurrant shoots growing in Moscow region. Mechanical damage on blackcurrant canes leads to the colonization with wound pathogens and, if severely damaged, to the death of the entire plant. As a result of the research, the pathogenic fungi Sphaeropsis malorum and species from the genus Colletotrichum also involved in the blackcurrant cane dieback, were first recorded on blackcurrant canes in Russia.