• 773-939-5426
  • phenomenaltreeservice@gmail.com

Emerald Ash Borer Prevention

The Emerald Ash Borer (EAB) is a dark green beetle approximately a half inch long, and an eighth of an inch wide. Known as the most deadly pest within forests in North America, it’s known for killing countless Ash trees all over the continent.

The EAB larvae tunnel into the bark of a tree, causing damage to the health of the tree and resulting in eventual death.

Emerald Ash Borer is normally spread through firewood, and therefore strong precautions must be taken when cutting and moving wood– EAB can remain in the wood for a period of two years after the tree is cut down, which means prolonged safety measures are required.

The recommendation is that upon cutting wood for a fire, it’s left for a period of two years to allow any EAB embedded in the wood to die off before being transported.

Preventing EAB Infestations

If your trees are infested with EAB, they must be either chemically treated every year or allowed to die. While there are a number of insecticides on the market intended to prevent EAB, application can be complex.

For example, the best way to treat the tree is via injection of the insecticide into the trunk, and it is therefore recommended that EAB be treated with the help of a professional– injection should occur in late May.

EAB can also be treated with the use of a trunk spray, which should occur in both early June and July.

Signs and Symptoms of EAB:

Crown Deterioration: The deterioration of both the upper and outer crown of the tree will start years after the initial infestation. It’s then that dead branches begin to appear, and the damage often shows first at the top of the canopy. As EAB feeding causes the supply of water and nutrients to be disrupted in their flow to the upper canopy, significant leaf loss also begins to occur. Leaves can also appear discolored and thinner than normal.

Woodpecker Feeding: Woodpeckers feed regularly on EAB larvae, and will damage the tree in an attempt to get at the larvae to the extent that the tree will appear to have lost long strips of bark.

D-Shaped Holes in the Bark: Upon reaching maturity in the bark, adult EAB will leave D-shaped holes about 1/8 inch in diameter as they emerge.