The Emerald Ash Borer is a metallic green wood-boring beetle of about 1 to 1.5 cm in length that attacks all native species of ash trees, typically killing them in two to three years. Its larva bore tunnels inside the tree, feeding off the inner bark until the tree dies.
Native to Northeastern Asia, the pest was first discovered in Ontario in the Windsor area in 2002. Since then, infested ash trees have been discovered in Essex, Lambton, Elgin and Middlesex Counties, the Municipality of Chatham-Kent, as far east as Toronto, Ottawa & Montreal and north to Sault Ste. Marie.
EAB was first discovered in London in October of 2006. We now know it has infested ash trees in all areas of the city. In some areas, the infestation and mortality rate of ash trees is more pronounced.
The following PDF(EAB Identification Guide)can be downloaded and used as a guide to identify Emerald Ash Borer and Ash trees as well as how to identify trees that may be infected by EAB.