The extreme cold will help many ash trees at least in the short term in Door and Kewaunee County. Most Emerald Ash Borers (EAB) can't survive when the air temperature drops below -20 degrees. Unfortunately, the larvae are insulated in the bark of the tree and will be able to survive according to Wisconsin DNR Plant Pest and Disease Specialist Bill McNee. EAB probably won't be able to do much damage for the rest of this year but EAB lay so many eggs, that long-term there won't be much of an impact on their population.

McNee says the temperature would have to drop to -30 degrees to have a significant impact on the larvae and it is not forecasted to get that cold in Door County.