Trunk Injection For Emerald Ash Borer: Protecting Your Trees In 2023

Emerald Ash Borer Treatment Options
Emerald Ash Borer Treatment Options from

The Emerald Ash Borer Threat

The Emerald Ash Borer (EAB) has been a menace to ash trees worldwide, causing extensive damage and even death to these beautiful trees. First identified in North America, the EAB has spread rapidly, leaving destruction in its wake. As a tree owner, it is crucial to take the necessary steps to protect your ash trees from this invasive pest.

Understanding Trunk Injection

Trunk injection is an effective method of delivering insecticides directly into the tree’s vascular system. It involves drilling small holes into the trunk and injecting the insecticide solution, which then disperses throughout the tree. This method ensures the targeted treatment reaches the areas where the EAB larvae reside, providing effective control.

The Advantages of Trunk Injection

Trunk injection offers several advantages over other treatment methods. First, it minimizes the exposure of humans, pets, and beneficial insects to insecticides. Since the treatment is contained within the tree, there is no risk of drift or contamination. Additionally, trunk injection allows for precise dosage control, ensuring the right amount of insecticide reaches the tree.

Furthermore, trunk injection provides long-lasting protection. The insecticide is distributed throughout the tree’s vascular system, providing systemic control that persists for several years. This is particularly beneficial for ash trees, as they require continuous protection against the EAB.

The Trunk Injection Process

The trunk injection process involves several steps. First, a certified arborist or tree care professional will assess the tree’s health and determine the appropriate treatment. They will then drill small holes into the tree’s trunk, typically spaced evenly around the circumference.

Next, the insecticide solution is prepared according to the manufacturer’s instructions. The solution is then injected into the drilled holes using specialized equipment. The number of injection sites and the amount of insecticide used will depend on the tree’s size and condition.

The Benefits of Professional Trunk Injection

While trunk injection can be done by homeowners, it is advisable to hire a professional for this task. Certified arborists have the expertise and experience to assess the tree’s health, identify any other issues, and administer the treatment accurately. They also have access to high-quality insecticides that may not be readily available to the public.

Monitoring and Maintenance

After trunk injection, regular monitoring and maintenance are essential to ensure ongoing protection against the EAB. Your certified arborist will schedule follow-up visits to assess the tree’s response to treatment, check for any signs of reinfestation, and provide additional treatment if necessary.


Trunk injection is a highly effective method for protecting ash trees from the Emerald Ash Borer. By choosing this treatment, you can safeguard your trees and preserve their beauty for years to come. Remember to consult a certified arborist or tree care professional to ensure the proper assessment and administration of this treatment. Act now to save your ash trees from the devastating effects of the EAB!