Harmfulness of some micromycetes during propagation of raspberries in protected soil conditions

Our research conducted in 2024–2025 revealed that the death of raspberry root suckers during their rooting in protected ground in early spring is caused by a set of pathogenic micromycetes. These include Botrytis cinerea with an occurrence frequency of 8.3–50%, Fusarium spp. (37.5%), Cylindrocarpon spp. (50%), Dactylonectria macrodidyma (33.3%), Phytophthora sp. (25–33.3%), Pythium spp. (12.5–16.6%), and Rhizoctonia solani (12.5–50%). The species composition of the micromycete set is infl uenced by a number of factors, with the main being the temperature during rooting and the species composition of the micromycetes parasitizing the root system of mother plants. Concerning the pathogenicity of individual micromycete species for raspberries, the Berkeleyomyces basicola fungus plays a particular role, being isolated in 37.5% of aff ected parts. Berkeleyomyces basicola is capable of independently causing damping-off disease on raspberry root suckers in protected soil conditions.