Scleroderris lagerbergii: Resistance and differences in attack between pine species and provenances

Various pine species and provenances attacked by Scleroderris lagerbergii are reviewed with respect to their resistance. Pinus aristata is a new host. Introduced pine species may often become attacked if the ecological conditions in the new localities are different from those occurring under natural circumstances. Usually local provenances are more resistant than southern ones, but less resistant than more northern ones.