The standards for size and species of trees that are being infested are continually changing. We have seen MPB infest trees down to 2 inches diameter at breast height. Many municipalities are seeing Mountain Pine Beetle infest other conifer species such as spruce and fir. Whether or not they are successfully reproducing in these different species has yet to be seen. The trees are being killed however by the blue stain fungus that is introduced with the beetle attacks. There are different bark beetle species that are infesting these conifer species as well.

Susceptible Trees Page