Emerald Ash Borer

What is an Emerald Ash Borer?


The Emerald Ash Borer (E.A.B) is a metallic green wood-boring beetle of about 1 to 1.5cm in length that attacks all native species of ash trees, typically killing them in two to three years. It’s larvae bore tunnels under the bark to feed on inner bark tissue. The tunnels cut the flow of nutrients and water to leaves, causing the tree to die.

Ash Trees

Ash Trees can grow to 30 meters (m) in height and are a common species in the urban forest. Ash have a compound leaf 13 to 30cm in length. Ash have a characteristic pattern of branches that is similar to maple in that the twigs emerge form the branch opposite to one another. Most other trees species in Ontario have an alternative pattern of branches.

Recognizing Trees that are Infested with E.A.B

Signs of E.A.B infestation include: yellowing foliage, thinning tree crowns and dead branches. Heavy seed production may also be seen near the end of the tree’s life, as trees can produce a heavy seed crop in reaction to stress. You may also see on the tree bark splitting or discoloration and characteristics D-shaped exit holes that are about 3mm in diameter. New shoots may be sprouting from various places on the trunk as the tree dies.

What you to know about E.A.B

– E.A.B only affects ash trees
– both heavily and weakened trees are attacked
– E.A.B attacks trees of all sizes from 1cm in diameter and larger
-infested trees die quickly and become hazardous
– you are responsible for maintaining the trees on your private property
-do not plant ash trees

Please call us today for more information on what you need to know about the managment of The Emerald Ash Borer (EAB)