The emerald ash borer (EAB) is a very destructive wood-boring insect pest of ash trees and in June of 2019, EAB was discovered in an Ash tree at the Forest Hills Golf Course in Forest Lake. Ash is the only known host of this borer in the United States. The exotic beetle is native to Asia, including China, Japan, Mongolia, Korea, the Russian Far East and Taiwan. It was first discovered in North America in southeast Michigan in June 2002, although it was likely introduced at least 10 years earlier. EAB was first discovered in Minnesota in 2009 and has spread through predominately the SE area of the State.