Emerald Ash Borer Assessment in Winnipeg — Local business ISA Certified Arborists

Green ash trees line the streets and back lanes across Winnipeg and the surrounding area, but the Emerald Ash Borer Assessment has become essential since the pest arrived in in Winnipeg and the surrounding area. This wood-boring beetle kills ash within two to four years of infestation, and early detection can mean the difference between treatment and removal. Our ISA Certified Arborists inspect your ash, identify the stage of infestation, and give you a clear path forward: treat the tree, monitor it closely, or remove it before it becomes a hazard. We have served Winnipeg since 2014, and we understand the ash canopy here better than most.

Why Emerald Ash Borer Assessment matters in Winnipeg

The emerald ash borer arrived in in Winnipeg and the surrounding area after Dutch elm disease had already thinned the canopy for decades. Green ash became the second choice for municipal plantings and in private yards, but the borer now threatens thousands of trees across the region. A tree that looks healthy on the surface may already be dying inside. Without assessment, you risk sudden branch failure, property damage, or the expense of emergency removal. We inspect for entry holes, bark damage, and the telltale D-shaped exit holes that confirm the borer is active.

• We identify early signs of infestation before the tree declines visibly.
• We recommend treatment options if the tree is worth saving and caught early enough.
• We assess whether monitoring is appropriate for trees with low risk or low value.
• We plan removal safely if the borer has already killed the tree or made it hazardous.
• We document findings so you can plan your budget and timeline with certainty.

Early assessment lets you act on your own terms, not after a branch falls or the tree becomes an emergency.

Local impact: In Winnipeg, roughly 40 per cent of street and yard ash trees show signs of borer activity. Untreated, an infested tree will decline within 24 to 36 months. Assessment costs from $135, and early treatment can preserve a tree for years longer than removal would.

How we assess your ash trees

Our assessment begins with a close visual inspection of the trunk, branches and canopy. We look for the D-shaped exit holes that adult borers leave when they emerge in late spring and early summer, and for the S-shaped galleries that larvae carve under the bark. We check for branch dieback, thinning canopy, and signs of stress or secondary pests. Once we have gathered this information, we discuss your options and give you a written summary so you can make an informed choice.

• We climb or use a bucket truck to inspect the upper canopy if the tree is tall or the damage is not visible from ground level.
• We document the infestation stage and the tree's overall health and structural condition.
• We explain whether the tree is a candidate for treatment, monitoring or removal based on its age, size, location and your goals.
• We provide a written report with photographs and clear next steps.
• We answer all your questions and discuss timing, cost and logistics before you decide.

You walk away knowing exactly what you own and what to expect.

Real example: A homeowner in St. James noticed yellowing leaves and sparse branching on a 15-metre ash in summer. Our assessment found active borer galleries and emergence holes. The tree was in the early stages of decline. We recommended treatment with a systemic insecticide applied by injection, which we arranged through a licensed applicator. The tree recovered and remains healthy two years later. Assessment and treatment planning cost $185 total.

Assessment methods and what they reveal

Each assessment is tailored to your tree and your situation. We do not use a generic checklist; we think about what matters most to you and what the tree can actually support.

Treatment, monitoring and removal options

Once we have assessed your ash, we discuss three paths forward. Treatment with systemic insecticide is most effective on trees in the early stages of infestation, with good canopy health and structural value. Monitoring is appropriate for trees that show no signs of active borer activity yet, or for trees where treatment is not practical. Removal is the right choice when the tree is already heavily infested, in decline, or poses a safety risk. We help you weigh the cost, timeline and long-term outcome of each option.

• Treatment involves injecting a systemic insecticide into the trunk; we coordinate with a licensed applicator and follow all provincial guidelines.
• Monitoring means we check the tree annually for new signs of borer activity and decline.
• Removal is clean and complete; we grind the stump and chip the wood, or arrange disposal if the wood cannot be chipped on site.
• We can recommend ash replacement species suited to Winnipeg's heavy clay soil and cold winters, such as bur oak or basswood.

Your choice depends on the tree's condition, your budget, and how much you value that particular ash in your landscape. We support whatever you decide.

For more information on ash removal and disposal, see our tree removal service page. If your ash is near a power line, we follow the approach distances set by in Winnipeg and the surrounding area Hydro and can refer you to them if the tree poses a clearance risk; learn more on our utility line clearance page.

Timing and seasonal considerations across the Winnipeg area

Emerald ash borer treatment is most effective when applied in late spring through early summer, just as the adult beetles emerge and begin feeding. This window runs roughly from May through July. Assessment can happen any time the tree is accessible and the weather permits safe climbing or bucket truck work. We offer emergency assessment and removal year-round, especially after heavy wet snow or summer windstorms that damage trees or expose hidden infestation.

• Late spring and early summer are the best time for treatment application, when borers are most vulnerable.
• Winter assessment is easier because deciduous trees are bare and damage is more visible, but treatment cannot be applied until spring.
• We schedule removal any time the tree is a hazard or the property owner prefers it, though late fall through early spring is ideal for removing larger trees without disrupting the active growing season.
• Call us immediately if a branch fails, the tree leans unexpectedly, or you see fresh emergence holes; we respond to emergencies 24/7.

Plan your assessment now so you have time to arrange treatment or removal before the next growing season.

Why choose Red River Tree Trimming for your assessment

We are fully insured and have worked in Winnipeg since 2014. Our crew includes ISA Certified Arborists who understand in Winnipeg and the surrounding area's ash canopy, the borer's behaviour, and the local soil and climate. We do not push you toward removal if treatment is viable, and we do not recommend expensive treatment if the tree is already too far gone. We give you the facts, the options, and our honest recommendation. You decide what happens next. Call us at (431) 441-0851 for a free estimate, or visit our contact page to request an assessment appointment. We respond within 24 hours and can often schedule within a week.

Prices Emerald Ash Borer Assessment in Winnipeg — Indicative pricing

Indicative prices; free, personalized estimate within 24h at (431) 441-0851.