Here’s one resident who may welcome the extreme cold wave headed for Minnesota. Your local ash tree.
The extreme temperatures moving in with Sunday’s arctic blast may kill off a significant percentage of emerald ash borer larvae, according to one of the premier forestry experts in Minnesota.
Winter mortality for emerald ash borer is definitely temperature dependent. The larvae can supercool to a certain point, but they die if they freeze, and there is variability in tolerance among individual insects. A recent study from the Forest Service (Venette and Abrahamson–see attached) in Minnesota showed that 5% of the insects die at 0F, 34% at -10F, 79% at -20F and 98% at -30F.
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