You may have seen or read discussion that the prolonged, extreme cold caused by the polar vortex this winter might eliminate the Emerald Ash Borer (EAB). This, unfortunately, is not true. The cold may have killed off some of the population, but it did not eliminate it.
Dr. Deborah McCullough, a Forestry & Entomology professor at Michigan State University (Michigan is where the EAB first appeared in the U.S.), has recently written that EAB will survive the cold. “In the fall, as temperatures begin to fall, physiological changes occur in insects including EAB. Insects are able to produce an internal antifreeze that prevents their cells from freezing.”
In addition, a representative from the Chicago Botanical Garden was featured on WGN television in the first week of April. They said the same thing, and went so far as to remove the bark from area Ash trees while on air, and found the larvae alive and well inside those trees.