Circular agar plugs with fresh mycelium of H. annosum isolates were inoculated onto the center of 9-cm Petri plates containing 2% MEA (malt extract agar) and incubated at 22°C in the dark. Presence of viruses in H. annosum isolates used for the experiment: –1W, isogenic isolates fully cured of vir...
ORGANISM(S): Heterobasidion annosum