Early symptoms of the disease can often be difficult to 
detect but may include dieback of the limbs and branches, 
yellowing of foliage, splits in the trunk of the infected 
tree, poor vigour, exudates from the trunk (kino 
production), scars may form on the trunk and darkening of 
the larger roots.

Removal of the bark may reveal the presence of mycelial 
fans ? these are large sheets of fungal growth, usually 
white in colour, which will have a characteristic mushroom 
odour. The surface of the affected timber is often pitted 
in appearance. 

The fungus produces mushrooms in May?June. These are olive 
brown to yellow in colour, can be up to 12 cm in diameter 
with a stipe (stalk) of up to 15 cm high, although usually 
less. The stipe will have an annulus (the ring of tissue 
around the stipe) that should be quite obvious. The spores 
of the fungus are white and these often coat the surface of 
the mushrooms.