Ukraine among European countries is in the leading place for growing crops. Among crops is black currant berries which contain 5,5–12,9% sugars, 1,9 to 3,8% of organic acids, 0,4–0,9% pectin, vitamin C 98–450 mg per 100 g wet weight, carotene, vitamins B1, B2, B9 (folic acid), PP, E, organic phosphorus, iron, potassium, calcium, magnesium, nitrogen, organic dyes. The potential yield of modern varieties of berries of a black currant can be up to 15 t /ha, but in fact it is 3–4 times less. The main reasons for the decline in yield of berries is the defeat of black currant fungal diseases: American powdery mildew, Anthracnose rust, Septoria blotch, milk shade, askohitozom, and verticlock fading. The results of the research, the study of varietal resistance of black currant to fungal diseases is established, the degree of damage of foliage, shoots and berries on the plants and dynamics of their development. Fetopathology the results of the evaluation indicate that the degree of damage of leaf apparatus was changed from 2,2 to 8,0% of the young newly formed shoots was 0,8 to 3,2%, berries and 1.2 to 5,7%. The weight of 100 fruit varieties jubilee Kopania was 225 g, Cossack – 224 g, Suite Kiev – 222 g, 76, 45, 43 g, respectively, compared to the grade standard Sanita. The highest structure of the berries had a positive impact on the yield of berries of black currant. The highest level of performance was the varieties jubilee Kopania, Cossack, Suite Kyiv – 5,6, 5,1, 4,9 t /ha, which provided the increase in yield of berries of black currant, respectively, 1,2, 0,7, 0,5 t /ha compared with the grade standard Sanita. For the purpose of protection black currant from fungi diseases and obtain stable yields of berries it is necessary to use resistant varieties of black currant Yubileynaya Kopanya, Cossack, Suite Kyiv, this will enable in terms of our economy further to 1200 kg/ha of berries

Keywords: American powdery mildew, anthracnose, the degree of damage, the yield of berries