Brown root rot (Phellinus noxius) is a fungal pathogen of forest and fruit trees. It is a native of Africa, Asia and Australasia.
Named for the brown-black crust seen on infected roots and crown of a host tree, this pathogen is believed to be spread via root contact, with possible survival of up to 10 years in the soil.
For more information about this plant pest, see the CABI data sheet.