In 1997, supplying Plant Pathogenic Microorganism Collection, microflora of diseased root crops from field and storage was analyzed. Samples from Districts Inspectors of PIOR from area of Poland were received, and 139 isolates of fungi from 369 samples of sugar and forage beat, forage cabbage, forage carrot and potatoes were obtained. The most often fungi from genus Fusarium occurred, and 23.5% of isolates from beet, 14.2% from cabbage, 29.5% from carrot and 48,2% from potatoes were received. The second dominant was species Alternaria a/terna ta, isolated from diseased plants in 28.9%, 50%, I 8.5% and 20% respectively. Among saprophytic fungi, species Penicillium and Aspergillus were represented in 9,7% of obtained isolates. Received results suggested that Fusarium spp. and Alternaria a/tema/a could be potentially dangerous for root crops as a pathogens or weak pathogens.