Influence of streptomycetes on the growth of plant pathogenic and ectomycorrhizal fungi. The plant pathogenic fungi (a) Fusarium oxysporum, Heterobasidion abietinum and Heterobasidion annosum were cultured for one week, and the mycorrhizal fungi (b) Amanita muscaria, Hebeloma cylindrosporum and Laccaria bicolor, were cultured for eight weeks with Norway spruce ectomycorrhiza associated streptomycete isolates. The extension of fungal mycelium was measured, and related to the treatment without bacteria (None = value 100). Mean and standard error of each experiment with at least 5 replicates are indicated. Signficant difference in mycelial growth in comparison to control without bacterial inoculation, determined by one way analysis of variance (p < 0.05), is indicated by asterisks.