CSU-Extension states: “Mountain Pine Beetles (MPB), Dendroctonus ponderosae, are the most important insect pest to Colorado’s pine forests.” They can have devastating effects on whole systems. Unfortunately, there are currently millions of dead trees across western North America. Prior to signs of dying trees, indications of an MPB infestation include: pitch tubes on the tree’s trunk, boring dust on or near the tree, yellow to reddish foliage, and the presence of live beetles (eggs, adults,…