Submitted by failedtalkshowhost t3_yzvqaw in askscience
WhyalwaysSSDD t1_ix5fzg8 wrote
Reply to comment by BogusHype in How do insects survive winter? How do northenly climates have any insects? by failedtalkshowhost
The mountain pine beetle in the Canadian Rockies, presumably south too, will cosntantly have swarms unless there is 3 consecutive weeks of -30°c to knock the population back. Wucks to have to endure it but it is nice when the mountains aren't all brown with dead trees that then light on fire.
BogusHype t1_ix5gbqf wrote
Maybe it was 4 weeks instead of months. This was years ago somebody told me.
WhyalwaysSSDD t1_ix5gydt wrote
Might be a different beetle down there too. Up here if you aren't absolutely miserable then the beetles will live. The past 2 years we have had 3-4 weeks of daily highs below -30° and it did knock them back, but the few years before it never got that cold (-25°max) and they flourished. A lot of fire tinder.
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