In northern Minnesota, researchers and foresters prepare for emerald ash borer invasion

Rob Venette, director of the Minnesota Invasive Terrestrial Plants and Pests Center at the University of Minnesota and research biologist with the USDA Forest Service, uses a draw shaver to strip the bark from an ash tree that was showing signs of being impacted by larvae of the emerald ash borer on March 4 near Remer.
Derek Montgomery for MPR News
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