Phellinus noxius
Phellinus noxius is a plant pathogen. It attacks a wide range of tropical plants, and is the cause of brown root rot disease. It was described as "an aggressive and destructive pathogen". The pathogen invades roots with contact between roots of a potential host with the substrate on which the fungus is growing.

Infection 
P. noxius attacks the roots and lower trunk of trees, causing roots to rot and resulting in dieback (another term for root rot). It causes brown root rot disease, which afflicts over 200 plant species in tropical and subtropical regions. The pathogen can survive in the soil and on dead plant material for more than a decade, and the primary source of infection to other plants and trees is from contact with infected root material to the healthy plant's root.

Treatment 
Fungicides Calixin, Bayleton, and Nustar inhibits growth for P. noxius on agar medium, however ultimately wasn't found effective for eradicating the P. noxius fungus in infested wood. A ammonia and urea mixture, as well as just volatile ammonia in itself, was found able to kill P. noxius in infested wood. Strains of Trichoderma applied in mulch around infected P. noxius trees started to grow new roots within 6-8 weeks of application, and the mycelium of P. noxius  was eradicated after 8-11 weeks of exposure.

Distribution 
P. noxius has only been recorded from tropical regions, although it has been reported in Japan and Australia, and hasn't been reported in South America.

List of countries where P. noxius is present

Hosts/Species Affected

Brown root rot 
P. noxius causes brown root rot, which is a serious problem in Taiwan and Hong Kong.

See Also 

 Root rot

References

External links

Fungal plant pathogens and diseases
noxius
Fungi described in 1932