Induced resistance of Hevea to South American Leaf Blight by incompatible races of Microcyclus ulei
1986
Ismail Hashim (EMBRAPA/SUDHEVEA/CEPLAC/RRIM Rubber Technical Co-operation Programme | Itabuna, Bahia (Brazil))
Inoculation of leaf discs of Hevea by an isolate of Microcyclus ulei incompatible to a Hevea clone induced resistance to subsequent infection by a compatible race. Simultaneous inoculation of compatible and incompatible races reduced the size of lesions but not their numbers. Inoculation of an incompatible race 24 h prior to inoculation of a compatible race reduced both the number and size of lesions. The reduction was proportional to the concentration of the incompatible race inoculum. On intact leaves, inoculation of a compatible race prior to an incompatible race reduced the number of lesions and the conidia produced
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