Emerald Ash Borer Spray: Protecting Your Trees In 2023

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The Emerald Ash Borer Threat

The emerald ash borer (EAB) is an invasive insect species that has caused significant damage to ash trees across North America. Since its discovery in the early 2000s, this small green beetle has been responsible for the destruction of millions of ash trees. If left unchecked, the EAB can lead to the death of entire ash tree populations, resulting in environmental and economic consequences.

Why Use Emerald Ash Borer Spray?

Emerald ash borer spray is an effective way to protect your ash trees from this destructive pest. This spray contains insecticides specifically formulated to target and kill the EAB. By applying the spray to your ash trees, you create a protective barrier that prevents the beetles from infesting and causing damage to the tree.

Using emerald ash borer spray is a proactive and preventive measure to safeguard your ash trees. It is especially crucial if you live in an area where the EAB has been detected or if you have noticed signs of infestation, such as D-shaped exit holes in the bark, thinning foliage, or woodpecker activity. Early detection and treatment can significantly increase the chances of saving your ash trees.

Choosing the Right Emerald Ash Borer Spray

When selecting an emerald ash borer spray, it is essential to choose a product that has been approved by the appropriate regulatory authorities. Look for sprays that contain insecticides such as imidacloprid or emamectin benzoate, as these have been proven effective against the EAB.

Consider the formulation of the spray as well. Some products come in liquid form, while others are available as granules or soil drenches. Choose a formulation that is convenient for you to apply and that will effectively reach the tree’s roots and canopy.

Application and Timing

To achieve the best results, it is crucial to apply the emerald ash borer spray at the right time. The timing of the application depends on the life cycle of the EAB and the specific product being used. Generally, it is recommended to apply the spray in early spring or late fall when the beetles are most vulnerable.

Follow the instructions provided by the manufacturer for application rates and techniques. In most cases, the spray needs to be applied directly to the trunk and branches of the ash tree. Ensure thorough coverage, especially targeting areas where the EAB is likely to lay its eggs or enter the tree.

Monitoring and Follow-Up

After applying the emerald ash borer spray, it is essential to monitor your ash trees for any signs of infestation or reinfestation. Regularly inspect the bark, branches, and foliage for any unusual changes or symptoms. If you notice any signs of EAB activity, it may be necessary to reapply the spray or seek professional assistance.

Consulting an Arborist

If you are unsure about applying the emerald ash borer spray yourself or if you require additional guidance, consider consulting an arborist or tree care professional. These experts have the knowledge and experience to assess the health of your ash trees and recommend the appropriate treatment options.


Emerald ash borer spray is an effective tool for protecting your ash trees from the destructive effects of the EAB. By choosing the right product and applying it at the correct time, you can significantly increase the chances of saving your trees. Regular monitoring and follow-up are essential to ensure the long-term health and survival of your ash trees. If in doubt, consult an arborist who can provide expert guidance and assistance. Don’t wait until it’s too late – take action now to protect your ash trees from the emerald ash borer.