The bitter cold temperatures that gripped Wisconsin this week could also have a chilling effect on an invasive insect species that threatens the state's ash trees, according to recent findings.
U.S. Forest Service research biologist Rob Venette co-authored a study that found temperatures around 20 degrees below zero can reduce emerald ash borer populations by half. Venette told Wisconsin Public Radio that this week's extreme cold will likely kill up to 80 percent of the invasive Asian beetles in Wisconsin.
