Heard about this on the radio this morning... Apparently the cold can significantly slow the spread of the emerald ash borer.
"His research found that 5 percent of larvae will die at 0 degrees, 34 percent at 10 below, 79 percent at 20 below and 98 percent at minus 30."
http://www.twincities.com/localnews/ci_24842238/silving-lining-cold-it-kills-emerald-ash-borers
"His research found that 5 percent of larvae will die at 0 degrees, 34 percent at 10 below, 79 percent at 20 below and 98 percent at minus 30."
http://www.twincities.com/localnews/ci_24842238/silving-lining-cold-it-kills-emerald-ash-borers