It has been reported that over 200 plant species in 59 families are hosts to Phellinus noxius. In Hong Kong, we know that trees species such as Aleurities moluccana, Bombax ceiba, Celtis sinensis, Delonix regia, Ficus microcarpa, Ficus benjamina, Gleditsia fera, Lophostemon confertus, and Mangifera indica are host to BRR disease.