EAB was first detected in Colorado in the City of Boulder in September 2013. EAB is an invasive, wood-boring beetle, native to China and eastern Asia that attacks and kills ash trees. It is responsible for the death of millions of ash trees in 25 states and two Canadian provinces, and it has cost municipalities, property owners, nursery operators and forest products industries billions of dollars to treat, remove and replace impacted trees. With ash species comprising an estimated 15-20 percent of all urban trees in Colorado, the insect poses a serious threat to Colorado's urban forests.
