How to determine if you got the bug!
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The life span of an individual mountain pine beetle is about one year. Pine beetle larvae spend the winter under bark. They continue to feed in the spring and transform into pupae in June and July. Adult mountain pine beetles emerge from an infested tree over the course of the summer and into early fall.
The mountain pine beetle transmits a fungus that stains a tree's sapwood blue.
Comprehensive testing has confirmed that the blue stain caused by the beetle has no effect on wood's strength properties.
Once mountain pine beetle infest a tree, nothing practical can be done to save that particular tree. Under epidemic or outbreak conditions, enough beetles can emerge from an infested tree to kill about two same-sized trees the following year. Ips and related beetles that emerge early in summer often are mistaken for mountain pine beetle, leading to early reports that "mountain pine beetle is flying." Be sure to properly identify the beetles you find associated with your trees. Trees from which mountain pine beetle have already emerged (look for numerous round, pitch-free exit holes in bark) do not need to be treated. The direction and spread rate of a beetle infestation is impossible to predict. However, attacked trees usually are adjacent or near previously killed trees.
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