Group Dying of conifers is caused by the fungus Rhizina undulata Fr., which commonly becomes established where fires have been lit in coniferous woodland or on ground recently cleared of coniferous trees. The spores of this fungus readily germinate in the soil after they have been subjected to relatively high temperatures (30-45 °C), hence the association with fires. This Leaflet describes all aspects of the fungus and its control.
