Emerald Ash Borer, Agrilus planipennis, is an exotic, invasive insect in North America that attacks and kills healthy ash trees. All ashes in the genus Fraxinus are attacked. If not protected with insecticides, essentially all of the green and black ash will die, but some of the white and blue ash are likely to survive. It also attacks declining white fringetree, Chionanthus virginicus; it’s not known whether it kills healthy white fringetrees. Emerald ash borer is native to China, Korea, Japan, Mongolia, the Russian Far East, and Taiwan. It was first identified in the Detroit, Michigan, area in 2002 and was first found in Illinois in 2006. Ash trees are important in our residential landscapes, towns, cities, and forests in Illinois. In many communities, ash trees comprise 10 to 20 percent of the trees.