These flowers - I believe the yellow is Tragopogon dubuis, the red to be Aquilegia formosa, and the purple is a Lupinus sp. - were photographed in the interior of BC last July, at a Forest Service campground. The area had been heavily hit by the Mountain Pine Beetle, and then logged, leaving huge slash piles and a dramatically altered landscape. Further up the mountain, on the other side of the lake, the trees were just beginning to change colour. In the logged areas, the flowers and grasses are beginning to take over, with small deciduous trees beginning to pop up, too. Note: According to E-Flora BC, http://linnet.geog.ubc.ca/Atlas/Atlas.aspx?sciname=Tragopogon dubius, the T. dubuis is an introduced species naturalized in BC.
physical methods are good methods to control beetles in forest. http://treeseed.home.news.cn/blog please read my blog in electrical forest.