Emerald Ash Borer Treatment in Kingston — Local business ISA Certified Arborists

Emerald Ash Borer Treatment in Kingston is a critical intervention for property owners whose ash trees show early signs of infestation. The emerald ash borer (EAB) has moved through this region over the past decade, and the ash trees still standing here are largely the ones that were treated early. We are ISA Certified Arborists who assess each tree's health and deliver trunk-injection treatments during the optimal window from late spring to early summer. Early detection and intervention can save a mature ash that would otherwise decline within two to three years of first damage.

Ash trees are common across Kingston and the surrounding area, particularly in mature neighbourhoods and on ravine lots where their deep root systems stabilise steep banks. When the emerald ash borer larvae tunnel beneath the bark, they disrupt water and nutrient flow, causing the crown to thin, branches to die back, and the entire tree to weaken. A healthy ash caught early responds well to preventative trunk injection. We work quickly to assess your tree, confirm the species and condition, and recommend treatment before the window closes.

Why early intervention saves your ash

The emerald ash borer spreads rapidly once established in a tree. A single year of infestation can cause visible crown dieback, and by year two or three, most ash trees are beyond saving. Early-stage trees showing only minor twig dieback or sparse canopy thinning respond very well to trunk-injection treatment. We conduct a thorough assessment on site to determine whether your ash is still healthy enough to treat or whether removal is the more practical choice.

• We identify emerald ash borer damage by inspecting the bark for small exit holes, peeling bark, and woodpecker activity.
• We assess crown condition and branch dieback to determine the tree's overall vigour and likelihood of treatment success.
• We deliver trunk injection using certified arboricultural techniques that deliver systemic insecticide directly into the tree's vascular system.
• We schedule treatment during late spring to early summer when the product is most effective against active larvae.
• We monitor treated trees and recommend follow-up injections if the tree shows continued stress in subsequent years.

Early intervention is far more cost-effective than removal and stump grinding. A mature ash that survives treatment continues to provide shade, root stability on slopes, and wildlife habitat for decades.

Local fact: We have treated hundreds of ash trees across Kingston, Loyalist Township, and South Frontenac since the emerald ash borer arrived. Trees treated in the first two years of detection have a success rate above 85 per cent when monitored and retreated as needed.

Our assessment and treatment process in the Kingston area

We begin every emerald ash borer case with a detailed on-site assessment. We climb or use a bucket truck to inspect the upper canopy, look for entry holes, assess branch dieback, and take core samples if needed to confirm the presence of larvae. This evaluation determines whether treatment is viable or whether the tree is too far gone. We then discuss your options, timeline, and the cost of a single injection versus removal.

• We visit your property and inspect the ash tree for signs of emerald ash borer activity and overall health status.
• We confirm the tree species and measure the trunk diameter to calculate the correct injection dose.
• We prepare the injection site by cleaning the bark and marking the injection points around the trunk circumference.
• We inject certified arboricultural insecticide into the sapwood using pressurised equipment designed for tree injection.
• We document the treatment date, product used, and dosage for your records and future reference.
• We recommend a follow-up inspection the following year to assess treatment effectiveness and plan any repeat injections.

The entire process typically takes two to four hours depending on tree size and access. We clean up all equipment and leave no mess on your property.

Real example: A homeowner in Westbrook noticed sparse foliage and small holes in a 40-year-old ash in their front yard. We assessed the tree, found early-stage emerald ash borer activity, and delivered a trunk injection in June. Two years later, the tree's crown is full and healthy, and the homeowner avoided a $2,500 removal and stump grinding bill.

Treatment methods and how they differ

We recommend trunk injection for ash trees showing early to mid-stage emerald ash borer damage and still maintaining 50 per cent or more of their crown. If your ash has lost most of its foliage, has major branch breakage, or is already leaning, removal may be the safer and more economical choice. We provide an honest assessment and help you decide.

Permits, insurance, and what happens after treatment

Emerald ash borer treatment is a private arboricultural service and does not typically require a municipal permit in Kingston or the surrounding area. However, if your ash is large or in a sensitive location, the City of Kingston may require an arborist report before you proceed. We can prepare that report as part of our assessment process. We are fully insured and carry comprehensive coverage for all work on your property. After treatment, we provide you with documentation of the injection date, product, and dosage for your records.

Follow-up care is simple. Water your ash regularly during dry spells in the first year after treatment, as the tree will be working hard to compartmentalise the borer damage and regrow new foliage. Avoid heavy pruning in the year of treatment. We recommend a follow-up inspection the next year to assess how well the tree responded and whether a second injection is warranted. Most ash trees treated in early stages need only one or two injections to stabilise.

If you are unsure whether your ash is worth treating, we offer a free estimate that includes a detailed assessment and honest recommendation. Call us at (343) 505-5777 or visit our contact page to request a free estimate. We serve Kingston, Loyalist Township, South Frontenac, Greater Napanee, and Stone Mills.

For more information on ash tree care and removal options, see our ash tree removal service. If you are considering treatment for multiple trees or a larger property management plan, our tree disease diagnosis service can help prioritise which trees to treat first. We also offer tree pruning to remove dead branches and improve the tree's appearance while it recovers from emerald ash borer stress.

Prices Emerald Ash Borer Treatment in Kingston — Indicative pricing

Indicative prices; free, personalized estimate within 24h at (343) 505-5777.