(Radio Iowa) – The final Iowa county has fallen to the Emerald ash borer invasion. The invasive insect that destroys ash trees was discovered recently in an ash tree in Armstrong in Emett County in northwest Iowa, marking the 99th county with an infestation. The first E-A-B infestation was discovered in Allamakee County in eastern Iowa in 2010.

There were an estimated 54 million woodland ash trees and three million in urban areas when the outbreak was first discovered. Many infect ash trees were cut down, and some were also cut down as a precaution. Some tree owners have opted to treat their ash trees to keep them alive as long as they can.

EAB is now found in all 99 counties after being discovered in Emmet county.