The emerald ash borer (EAB) is an invasive insect from East Asia. It was first found in North America in 2002, but it may have arrived as early as 1990. Experts believe it came in solid wood packing materials shipped from Asia. Since then, the insect has spread quickly across the eastern United States. It spreads when people move infected ash firewood, nursery plants, and other ash wood products. The beetle can also spread by flying short distances. EAB was first discovered in Minnesota in 2009.

All ash tree species (Fraxinus) can be attacked by EAB. Millions of ash trees have already died in the United States and Canada. Minnesota has nearly one billion ash trees in cities and forests, which is the highest number in the country. The loss of trees to the Emerald Ash Borer leads to significant economic costs from removing dead trees and replacing lost timber, while also harming the environment by reducing canopy cover, wildlife habitat, and natural air and water filtration. This dual impact strains both communities and ecosystems. The loss of these trees causes serious economic and environmental consequences.

Carver County offers a grant program to help property owners treat ash trees and slow the spread of EAB. Learn more below.