The investigations were done between 1990-1994. Seedlings collected from 120 plantations were evaluated. The fungi responsible for seedling damping-off occurrening most often were Alternaria spp., Fusarium spp. and Pythium spp. isolated from 46,3, 32,2 and 16,6% of infected plants, respectively. The most important pathogens were A. petroselini which infected 33% of seedlings and A. radicina - 11%. Among Fusarium species the most common was F. avenaceum, comprising 61% of total Fusarium isolates. The next were following: F. culmorum - 21%, F. solani - 12,6% and 3% for both F. equiseti and F. oxysporum. Damping-off of seedlings was also caused by the other fungi but they were noted in low intensity. Among them were following: Phoma spp., A. alternata and Rhizoctonia solani on 2,8; 2,3 and 1,2% of tested seedlings, respectively. The species: Sclerotinia sclerotiorum, Botrytis cinerea, Bipolaris sorokiniana and Septoria petroselini were isolated in total from 0,9% of seedlings. Drechslern biseptatu and Stemphylium botryosum caused seedling damping-off sporadically.