It took less than 10 years for the emerald ash borer to spread from Detroit to all eight Great Lakes states and Canadian provinces. It is the most costly invasive forest insect ever in North America, both in terms of trees killed and economic damage. State officials and homeowners have used insecticides, tree-removal strategies, bans on moving firewood and even biological controls to slow infestations and halt new ones. The video below looks at how three different kinds of parasitic wasps are being used to combat the ash borer.
The ash borer is still active in the Great Lakes Echo’s Invasive Species Smackdown which pits some of the most heinous invaders against each other for the crown, defeating the Syrex Woodwasp. It will move on to face an all-time heavyweight, the Gypsy Moth, in the quest to be the worst of the worst!