The emerald ash borer is a non-native, highly invasive and destructive wood boring beetle that feeds under the bark of ash trees. All species of ash tree are vulnerable to attack. The Emerald Ash Borer has killed millions of trees in Ontario, posing a major threat to the environment and economic activities. The way the emerald ash borers live and feed causes serious damage to the tree and often kills them. The City of Ottawa is responsible for treating and/or removing infested city-owned trees however the responsibility for removing privately owned infested trees falls on the owner. Special precautions must be taken when removing a tree infested by emerald ash borers, most importantly proper disposal of wood. Make sure you have your infested tree removed by a certified arborist so you can help prevent the damaging spread of this invasive species.