Communities of free-living and plant parasitic nematodes in some forest nurseries of the Slovak Republic

Communities of free-living and plant parasitic nematodes were studied in some forest nurseries of different regions of the Slovak Republic. 89 nematode species, members of all trophic groups, were found altogether. A total of 18 species of plant parasitic nematodes were identified in all the localities. Predominating species were Helicotylenchus digonicus, Malenchus exiguus, Paratylenchus goodeyi, Rotylenchus fallorobustus, Rotylenchus robustus and Bitylenchus dubius. The structure of trophic groups, and also percentage occurrence of parasitic nematodes varied with individual region. Omniphages predominated in most of the regions studied.