Abstract: The growth and propagation of Bursapkelenchus xylophilus (Steiner & Buhrer) Nickle and B. mucronatus Mamiya & Enda on the wood segments of 4 tree species was tested. The results showed that both of the nematodes could grow and propagate well on and in the pine wood segments for over 8 months; on the wood segments of hemlock, spruce, and douglas fir the nematodes could not propagate well and hardly entered the wood. Among the 29 fungal species tested, 3 were very suitable for the nematodes propagation, which were Aleurodiscus canadensis Skolko, Cytospora pint Desm. and Tyromycfs kravtzevianus Bondarzew & Parmasto in Parmasto. The nematodes did not propagate in the other 11 fungal species, and the rest 15 fungi as food sources for the nematodes varied greatly. The results showed that the nematodes growth and propagation on fungi were not relevant to the original hosts and the taxonomic category of the fungi.