Emerald Ash Borer

It is strongly recommended that property owners consult with a Certified Arborist to discuss appropriate Emerald Ash Borer treatment options to avoid unnecessarily destroying a tree that can be saved.


What is Emerald Ash Borer?


Emerald Ash Borer (EAB) is an invasive beetle from Asia that has killed millions of ash trees in the Midwest, Mid-Atlantic region and Canada since 2002.

The half-inch long adult EAB has metallic green wings and causes little damage to trees. The EAB larvae feed under the bark on the xylem layer, disrupting the movement of water and nutrients within the tree and typically causing death within a few years of infestation.


Are my trees at risk?


The EAB only attacks ash trees, but ash trees are found extensively in residential and commercial landscapes and natural woodlands. Because EAB has been found throughout Ohio, all ash trees are at risk for infection.

Correct identification of the trees in your landscape is the first step to determining if EAB will impact your landscape.


Treatment options


Treatments are available that may help prevent or slow down EAB infestation of your ash trees. These pesticides can serve as a control measure but are not a cure. For optimal control, treatments need to be done before infestation on the tree occurs.

Specimen trees, trees that provide significant shade for outdoor areas, and healthy vigorous trees are ideal for preventative treatments.

Trunk injection treatments are injected directly into the trunk of the tree. This is the preferred EAB treatment since the treatment is transported within the tree more quickly than soil applications and it lasts for two years.

Soil systemic insecticides are applied to the soil and taken up by the roots and distributed throughout the tree. The soil systemic drench can be applied from late February through early April. Soil system treatments must be performed on an annual basis to maintain effectiveness.

Emerald Ash Borer Damage 2


Consider treatment or replacement


Removal and replacement with another species may be the best alternative for trees that are significantly infested or declining. Unhealthy trees create safety hazards for people and property.