A few years ago I heard talk locally of a study by the University of Alberta relating to the lower than expected mortality in some areas of our pine forests from the mountain pine beetle. Especially considering our forests aren't adapted to the MPB as they are north and east of the traditional range of the MPB. The study was published over a year ago but I finally found it tonight. According to the study trees with larger resin ducts have a higher survival rate. Last I heard foresters were looking at some of our specific pine species for MPB resistance in their reforesting operations, where this has went though I'm not sure.
Larger Resin Ducts Are Linked to the Survival of Lodgepole Pine Trees During Mountain Pine Beetle Outbreak
Periodic mountain pine beetle outbreaks have killed millions of hectares of lodgepole pine forests in western North America. Within these forests some pine trees often remain alive. It has been rarely documented whether anatomical defenses differ between beetle-killed and remaining live pine...