Why are pine beetle infestation spreading in the US?



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    Pine beetles are native to western North America, but they have spread through the transportation of infested firewood and by traveling from tree to tree in densely populated pine forests.  Misidentification and improper treatment of infested trees allows the larvae to grow, infest, and reproduce – so epidemics occur.  One a tree is infested, no practical measures are available to save the tree, so it must be cut down.  Spraying is recommended as a preventative measure to control spreading. 

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