The Emerald Ash Borer (EAB) is a destructive insect that has claimed tens of millions of ash trees across North America. Once an ash tree is infested, survival is unlikely without timely, proactive treatment.  Our ISA Certified Arborists provide the technical expertise and targeted trunk injections designed to help protect your ash trees.

ISA Certified Arborists. Proactive EAB Protection.

Emerald Ash Borer Treatments

At A Plus Tree, we provide strategic emerald ash borer treatments for HOAs, commercial properties, and homeowners. Through our partnership with Rainbow Ecoscience, we bring serious EAB treatment expertise to the West Coast, pest crusade included.

When to Treat

The tree is a healthy ash larger than 10” in diameter.

Infestation is suspected but the tree shows no more than 30% canopy decline.

The property is located within 15–25 miles of a confirmed EAB infestation.

You require a cost-effective alternative to expensive tree removal and replacement.

What Happens Next

An urban forest specialist can perform a free inventory and inspection of your ash trees to determine whether treatment is the best option for your site.

PROTECTING AN ASH TREE FOR 20 YEARS IS OFTEN LESS THAN THE COST OF A SINGLE REMOVAL.

  • What’s Included in Our EAB Services

    Our emerald ash borer treatments utilize trunk injections that deliver a water-based formulation directly into the tree’s vascular system. We use Mectinite (emamectin benzoate) to support fast uptake and provide two-year control for Emerald Ash Borer when applied to appropriate treatment candidates. Every service includes a professional health evaluation to ensure the tree is structurally sound enough for treatment.

  • Our Professional Process

    Our technicians perform treatments by injecting the product into the trunk just above the soil line. This allows the tree’s natural vascular system to distribute the treatment to the branches where pests feed. This closed-system method helps limit drift and off-target exposure compared with spray applications, and treatments are applied according to product label directions and site conditions.

  • EAB Treatment Cost Factors

    Pricing is determined by the size of the tree, measured by Diameter at Breast Height (DBH). While emerald ash borer treatment costs vary, they typically range from $85 to $300 per tree. Proactive care allows you to retain mature canopy value at a cost that is often significantly lower than removal and replacement.

  • The Best Time to Schedule

    Timing is critical for successful uptake; treatments are often most effective when the tree is actively moving water and nutrients, commonly after leaf-out in spring. If a tree shows excessive decline, we recommend prompt removal, as ash wood becomes brittle and poses a safety hazard once dead.

  • Why Choose A Plus Tree

    Through our partnership with Rainbow Ecoscience, we offer advanced product formulations and treatment strategies developed for EAB management. We track every treatment via ArborPlus, allowing you to manage your ash tree health across a multi-year budget plan.

TALK TO AN EAB SPECIALIST TODAY

Recognizing the Signs of EAB Infestation

Damage is often unnoticed until it is extensive because EAB larvae feed on the inner bark. Watch for these common warning signs: 

  • Thinning or dieback in the upper canopy.
  • “D-shaped” exit holes (approx. 1/8-inch) in the bark.
  • “S-shaped” galleries (tunnels) visible beneath the bark.
  • Increased woodpecker activity as birds feed on the larvae.
  • Vertical bark splitting and new sprouts growing from the base of the trunk.

Trusted by Your Neighbors

Feedback from our clients

The A plus tree team is awesome!

We had a big tree fall on Super Bowl Sunday late in the evening during the game. Rachelle responded promptly to the urgent call and had a team out first thing the next morning to deal with the situation.

Appreciate the whole team!

Trish Blair

We started using A-Plus recently and are very happy with their results. We have an HOA with many trees we care for so it’s imperative we have a good team. Andre and the crew were fabulous, responsive and friendly to work with. We just had a trash truck take out a tree today, A-Plus responded and got here within 4 hours to fell the tree as it was unsafe. Great job. We look forward to our continued relationship.

Michele D.

I had a tree fall in my driveway and block me from getting out. I had an important appointment to get to. A Plus Tree Service was there in an astoundingly short amount of time. They were courteous, calm, and very professional. The best part: I was out of my driveway in 13 minutes. I made it to my appointment. I highly recommend them; they have outstanding service, and work quickly.

Paula S.

We had a 50 ft dead pine tree that was at risk of falling onto our house.. We called these guys in and they had the entire tree with the stump removed in 2 hours. What other company can you find where almost every one of their employees are certified arborists? They’re professional, knowledgeable, straight forward, and fast.

Phil H.

Totally agree with the other reviews. Had a large tree at my rental that had split in half and fallen, leaning into the neighbors yard! From the moment I called, the team at A+ Tree was ultra-responsive, and made me feel like they appreciated the urgency I had at getting this taken care of. Was able to set a removal appointment very quickly, and the workers that showed up were just as quality as the rest of my experience. They were friendly, careful, and did an amazing job (in a reasonable amount of time!). I am SO glad I was referred to you guys–and will definitely be passing your name along to anyone in need! Thank you A+ Tree!!! Would use again..A+

Elle M.

Certifications

ISA Certified Arborists and CTSP-certified safety leadership available on major projects.

TCIA Accredited

TCIA-accredited arborists, fully licensed and insured.

Emerald Ash Borer FAQs

Larvae feed on the inner bark, disrupting the transport of water and nutrients and effectively starving the tree.

Professional trunk injections can provide at least two years of protection when the tree is a good treatment candidate.

We may recommend Mectinite, an emamectin benzoate trunk injection formulation, when appropriate for the tree and site.

Success is highest for trees with less than 30% canopy decline; extensive damage may prevent the tree from moving the product.

Yes, trunk injections deliver the product directly into the tree, reducing drift and off-target exposure compared with spray applications.

Untreated infested ash trees are unlikely to survive and can become brittle safety hazards as they decline.

Browse Our Tree & Lawn Care Resources

Tree 101 Guide
Tree Removal Safety Standards
Our Tech: ArborPlus

Ready to save your ash trees?