Nice photos....and this is a Hijack warning for this thread....but have to tell you that the Mountain Pine Beetle (MPB) is a native species to our forests and has nothing to do with Asia. The current epidemic is caused by the "perfect" storm of conditions, there is a variety of factors, but most notably;
1 - aggressive forest fire fighting post WWII assisting to create the massive food source of over mature Pine.
2 - lack of "cold snap" prior to November 15 (global warming?).
The death of 25% of our commercial timber by 2013 is simply mother nature doing what is expected and to some extent necessary. It may have tragic economic consequences, but it is NOT an ecological tragedy by any means.
Natural forest fire activity creates the reasonably large mono cultures of Lodgepole Pine (fire initiated species - heat from fires opens the cones that have fallen to the ground for years thus renewing the species). These vast areas of Pine have been protected by the timber company's and the Ministry of Forests very aggressively from post WWII till now in order to save the timber for harvesting. These huge areas have become "over mature" - mature generally accepted in Lodgepole Pine as 80 years old. The over mature trees do not have the resources to "pitch out" the beetle - which is pretty much the only defense the trees have as the little beetle bores into the tree.
Even an overnight chill of minus 15-20 in mid October would help keep the beetle population in check - but by December, the beetles have built up their anti freeze defenses and would need minus 30 for 2 weeks to have any significant mortality on the population. We have not had the October cold snaps that used to be common, nor has the interior experienced long enough periods of minus 30 or more in the heart of winter....thus the beetle rampages on.
Its ironic how something so little will end up destroying so much - especially after so much work was put into protecting the timber for the purpose of milling it into finished products. The economic damage to the interior by 2015 will be massive.
Animated map of MPB infestation since 1950 at;
http://cfs.nrcan.gc.ca/subsite/mpb/hist ... historique
Additional info at;
http://www.for.gov.bc.ca/hfp/mountain_pine_beetle/#info