The effect of fungicides used in the protection of forest tree seedlings on the growth of ectomycorrhizal fungi

Abstract

Fungitoxical activity of ten fungictdes most commonly used in the phytopathological protection of forest nurseries was studied, using the <i>in vitro</i> screening method. The fungitoxical activity was studied against five species of ectomycorrhizal fungi (seven strains). The resulting growth inhibition of fungi species and strains tested was prcscnted in terms of fungitoxicity classes of the preparations used. The highest total fungitoxicity against the mycelia of fungi taxa tested was found for Euparen, Bravo, Dithane M-45 and Ridomil. The weakest fungitoxical effect was observed for Topsin M and Bayleton. The least susceptible for the action of the fungicides studied were mycelia of <i>Suillus luteus</i>, while the most susceptible were those of <i>Hebeloma crustuliniforme</i> and <i>Laccaria laccata</i>. The study results arę useful for the selection of fungi strains proper for the artificial mycorrhization of seedlings.