Hevea Brasiliensis (Muell. Arg.) like any
other monoclonal crop is afflicted by a great number
of pathogen and the most infective being fungi. In
Nigeria, over 65% of Hevea diseases are caused by
fungi (Begho, 1995). Root diseases of Hevea
Brasiliensis are known to be the most serious as they
are often fatal. Of all the root diseases, the white root
rot (WRR) is most destructive and accounts for about
96% of incidence of root diseases in Nigeria,
Cameroun and Ivory Coast. Otoide (1978) reported
that over half hectre of plantation can be destroyed
within five years of infection in Nigeria.