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How to tell if your ash tree has an emerald ash borer infestation

Have you or your neighbors purchased or received firewood, landscape trees, logs, timber, or branches from Michigan in the last 5 years? Many states are now setting up quaranteen areas that ban the transport of wood from one area to another. These are suspected to be common ways the Emerald Ash Borer is spread, but by no means the only ways.

Did you know that an Emerald Ash Borer can also be spread by your automobile? Vehicles that collide with the borer and don't kill the insect on impact, can also transport the insect to other areas.

Emerald Ash Borer exit hole.After you have determined that you have an ash tree, check for the following symptoms:

  • Distinct, D-shaped exit holes in the bark

  • Serpentine-shaped tunnels under the bark on the surface of the wood

  • Young sprout growth clustered at the base of the tree

  • Unusual activity by woodpeckers

  • Die-back on the top third of the tree

  • Vertical splits in the bark

Emerald ash borer is a death sentence for ash trees infected with the larvae of this beetle, killing the ash tree within 3 - 5years of infestation.

The larvae feed on the cambium layer, the tree’s live tissue just beneath the bark. This cuts off the tree’s nutrients and water and essentially starves the tree to death. Larvae over winter beneath the bark and can be inadvertently transported via firewood, logs, or nursery stock.

Read also: White Ash Tree

White Ash Tree

Treatment for Emerald Ash Borer Infestations

  • Inspect your ash trees for signs of damage—D shaped exit holes, thinning crown, and dead limbs.

  • While many believe the only preventative method for stopping the spread of the Emerald Ash Borer is to clear-cut trees, there is another alternative. Recent Michigan State University (MSU) research, conducted in conjunction with the USDA, confirmed Imicide® and Inject-A-Cide B® from the J.J. Mauget Co. are effective for the control of the Emerald Ash Borer.

  • Mauget’s enclosed micro infusion system works from the inside out, so it’s sensitive to the environment and less harmful to the tree.

  • Any professional applicator can be trained to use Mauget’s micro-infusion technology, which only requires a power drill, gloves, tape measure, rubber mallet, protective eyewear, and Mauget’s feeder tubes and capsules.

  • A new drill bit is provided with every case of Mauget products for an accurate application every time.

For more information about Mauget Injections >>




Identifying the Emerald Ash Borer.