EN
The foliage and bulb healthiness of six narcissus cultivars grown on two commercial plantations near Puławy, was investigated in the years 2007–2009. Among fungal isolates obtained from foliage, species Botrytis narcissicola dominated. Its share ranged at the beginning of flowering from 0.0 to 93.1% and at the end of flowering from 86.4 to 96.3% of all obtained isolates. The diseased plants showed symptoms ranging from necrotic 1-side streaks to a leaf causing sickle–shaped deformation, necrosis of flower buds to necrosis of flower stalk, base of which became brown, soft and slimy, covered with gray mass of conidial sporulation. From the bulbs of narcissi, the fungus was isolated less frequently, only in a single year and from one plantation. This indicates another possible primary inoculum sources than bulbs.