Overwintering survival of mountain pine beetle larvae and resultant effects on beetle populations in the Northern Region in 1979 Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/5m60qt23x

During December 1978 and January 1979, temperatures reached all-time lows in some parts of Montana. Overwintering mountain pine beetle populations were sampled at 11 sites during February and March 1979. Effects of the extreme cold varied from site to site, with larval mortality ranging from 6 percent to 100 percent. As a result, beetle populations will likely be reduced substantially in some areas and affected little in others.

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