In this study, Aphelenchoides composticola which is known as the mycophagous nematode were inoculated onto 10 mushroom seedlings growing in malt-extract glucose agar on Petri plates. After sixteen days of inoculation, the nematodes were extracted and counted. Out of 10 species of mushrooms tested, Aphelenchoides composticola fed and multiplied on 6 of samples with Agaricus bisporus being the most favourable host. Macrolepiota procera var. procera also favoured the reproduction of the nematode. Fortunately, some species of Pleurotus and Clitocybe gibba, Infundibulicybe geotropa showed a genetic resistance to the nematode.