Spotted Lanternfly Reaches Ontario: How to Identify and Report It

Quick answer: The spotted lanternfly (Lycorma delicatula) was confirmed in Windsor, Ontario in mid-September 2026, the first detection in Canada. If you think you’ve found one in the GTA or anywhere in Ontario, take a photo, catch the insect (or scrape the egg mass) into a sealed container, and report it to the Canadian Food Inspection Agency (CFIA) right away. Don’t move firewood, and check your vehicle, patio furniture and camping gear before you travel. This is a report-it pest, not a spray-it pest, at least for now.

What happened: Canada’s first spotted lanternfly detection

In mid-September 2026 the Canadian Food Inspection Agency confirmed spotted lanternfly in Windsor, Ontario. It’s the first confirmed detection anywhere in Canada. The insect has spread through the northeastern United States for over a decade, and Windsor sits directly across the river from Detroit, one of the busiest truck and rail crossings on the continent. The CFIA has responded with surveillance around the detection site and restrictions on moving plant material that might carry it.

For most GTA homeowners the practical point is this: one detection isn’t an established population, but the next few weeks are exactly when people can accidentally help it spread. Adults are active into December, and females are laying egg masses right now on almost any hard, flat surface: tree bark, fence posts, stone, patio furniture, trailers and car bumpers.

This post covers how to identify every life stage, what to do if you find one, and what’s worth worrying about. It follows the same approach as our Japanese beetle alert: an invasive insect you should know about before it’s in your yard.

How to identify spotted lanternfly at every life stage

Spotted lanternfly is a planthopper, not a moth or a fly. The CFIA publishes the life-stage timing below; ours is the identification detail homeowners actually need.

Egg masses (September to spring): the stage most people miss

• Look: a grey-brown, mud-like smear about 2–3 cm long, often compared to a dried splash of putty or cement. Fresh masses look glossy and grey; older ones crack and show rows of seed-like eggs underneath.
• Where: tree trunks (especially tree-of-heaven, maples and willows), stone, fence posts, sheds, firewood, outdoor furniture, trailers, boats and vehicles.
• Why it matters: each mass holds roughly 30–50 eggs and survives the winter. Egg masses on a car or trailer are how the insect moves hundreds of kilometres.

Early nymphs (May to July)

Small (a few millimetres), black with bright white spots, wingless, and very jumpy. People often mistake them for ticks or small beetles until they leap.

Late nymphs (July to September)

About 1–1.5 cm, bright red with black and white spots. This is the most distinctive stage and the easiest to photograph.

Adults (July to December)

• About 2.5 cm long.
• Resting: pinkish-grey to tan forewings with black spots and a brick-like pattern at the tips. At rest it looks a lot like a moth.
• Wings open: a flash of scarlet hindwings with black spots and a white band. Once you’ve seen it you won’t forget it.
• Usually found in groups on tree trunks and vines, often with sticky “honeydew” and black sooty mould underneath.

Common look-alikes in Ontario

Insect	How to tell it apart
Tiger moths / underwing moths	Moths have feathery or thread-like antennae and scaly wings; lanternflies have tiny antennae and hop
Leafhoppers	Much smaller (under 1 cm), usually green or brown, no spotted wings
Boxelder bugs	Black and red, but long and flat with no spots; gather on sunny walls in fall
Egg masses of gypsy/spongy moth	Tan and fuzzy like felt, not smooth like dried mud

Found one? The CFIA protocol: photo, catch, report

The CFIA’s instructions are simple, and the order matters:

1. Take a photo or video. Get the wings, legs and a coin or finger for scale if you can. For an egg mass, photograph it in place.
2. Catch it. Put the insect in a sealable container, or scrape the egg mass into a bag or jar. The CFIA may want the specimen, so don’t throw it away. If you can’t catch it, a clear photo and precise location are still valuable.
3. Report it right away through the CFIA’s online contact form. Include the exact address or GPS pin, date, and your photos.
4. Note where it came from. If it was on something that recently travelled (a car from the U.S., new nursery stock, patio furniture, a camping trailer), say so. Pathway information helps inspectors trace it.

The CFIA’s full spotted lanternfly page has current photos of every stage.

Why Ontario cares about a bug that doesn’t bite

Spotted lanternfly doesn’t bite people or pets, doesn’t sting, and doesn’t infest homes the way mice or cockroaches do. So why the national alert?

• Grapes. The CFIA notes it feeds on more than 100 plant species, but serious damage has been seen mainly on grapevines. Ontario’s Niagara and Lake Erie North Shore wine regions are among the most valuable agricultural land in the country, and the Windsor detection is on the doorstep of the Lake Erie North Shore.
• Trees and orchards. It weakens maples, walnuts, willows and fruit trees by feeding on sap, and heavy feeding stresses young trees.
• Nuisance at home. Where populations get established in the U.S., homeowners deal with swarms on decks and patios, sticky honeydew on cars and furniture, and black sooty mould on anything underneath.

Nobody is suggesting a GTA backyard is at risk this fall. The goal right now is early detection: an insect found in its first year in a new place can sometimes be contained, while one found in year five usually can’t.

What GTA homeowners should do this fall (and what not to do)

Do

• Check before you travel home. Coming back from the U.S. Northeast, Michigan, or the Windsor area? Walk around your car, trailer or boat and look for mud-like smears on bumpers, wheel wells and hitches.
• Buy and burn local firewood. Moving firewood is one of the main ways invasive insects spread. That goes for cottage trips to Muskoka too: buy it where you burn it.
• Inspect new plants and second-hand outdoor furniture before they come onto your property.
• Walk your trees once in October. Take five minutes to look at trunks, fence posts and the undersides of patio furniture. It costs nothing and doubles as a check for wasp nests, carpenter ant frass and rodent gnaw marks around your foundation.

Don’t

• Don’t spray. There’s no established Ontario population to treat, and spraying the wrong insect kills beneficial ones. Report first; let the CFIA identify it.
• Don’t squish it and move on. In the U.S. the advice is “stomp it.” In Canada right now, a specimen and a report are worth far more than a dead bug on the sidewalk.
• Don’t panic about every red bug. Boxelder bugs are gathering on sunny walls across Toronto, Markham and Mississauga this month. They’re black and red, but long and flat, with none of the lanternfly’s spots.

Will pest control companies treat spotted lanternfly?

Not right now, and we’d be suspicious of anyone who offered. In Canada, spotted lanternfly is a federally regulated pest. Detection, identification and response belong to the CFIA, not to private pest control. If you find one on your property, the CFIA is your first call, not us.

What a licensed pest professional can help with is the fall insect pressure you’re actually dealing with this month. Late September is when boxelder bugs, stink bugs, lady beetles, spiders and cluster flies move toward your walls looking for somewhere to spend the winter. The entry points they use (gaps around windows, siding seams, utility penetrations, soffit vents) are the same gaps mice use in October.

For a single problem, a one-time General Insect Control treatment runs from $395 exterior or $475 interior + exterior, with a 60-day guarantee. Every service starts with a $95 professional inspection, credited when you book the treatment.

Our recommendation: protect the whole year, not just the problem you noticed

A one-time treatment fixes what’s in front of you today. Invasive species are a good reminder of why we steer most homeowners to year-round protection instead: the insects around your house change every season, and prevention costs far less than one bad infestation.

• Insect Control plan: $845/year. Seasonal exterior treatments for ants, spiders, earwigs, overwintering invaders and wasp activity, with a technician looking at your property several times a year rather than once.
• Essentials: $1,195/year. Insects plus mice protection, for homes that want both handled.
• VIP (from $1,395) and ELITE (from $2,795) for larger properties and broader coverage.

No initiation fee, no setup fee, no monthly billing. See what’s included on our plans and pricing page, or take the 60-second free quote quiz and we’ll recommend the right tier for your home.

Sani IQ is licensed under the Ontario Pesticides Act, registered with the MECP, BBB Accredited, and carries $5M liability coverage. Our technicians are employed, licensed and background-checked, never subcontractors. We use reduced-risk products and methods, and we’re rated 5.0 across 126 Google reviews. Call (705) 302-1887.

For more on what’s living around your home, browse the Sani IQ Pest Library.

FAQ

Is spotted lanternfly in Toronto?

As of late September 2026 the confirmed Canadian detection is in Windsor, Ontario. There has been no confirmed GTA detection. The CFIA is surveying around the Windsor site, and any suspected sighting elsewhere in Ontario should be reported to them.

Is spotted lanternfly dangerous to people or pets?

No. It doesn’t bite or sting and isn’t known to be toxic to pets. The harm is to plants, especially grapevines, and the nuisance comes from honeydew and sooty mould where populations get large.

What does a spotted lanternfly egg mass look like?

A grey-brown smear about 2–3 cm long that looks like dried mud or putty. Masses are laid from September to November on bark, stone, fences, furniture and vehicles, and they survive the winter before hatching in spring.

Should I kill a spotted lanternfly if I find one in Ontario?

Photograph it first, then catch it in a sealed container if you can and report it to the CFIA. In Canada, a confirmed specimen with a location is more useful to inspectors than a squished insect.

How do I report a spotted lanternfly in Canada?

Use the CFIA’s online contact form. Include photos, the exact location, the date, and anything you know about where the insect may have come from.

Can a pest control company get rid of spotted lanternfly?

Not at this stage. It’s a federally regulated pest, and the CFIA leads detection and response. A licensed pest control company can handle the fall insects actually getting into your home this month: boxelder bugs, stink bugs, spiders and cluster flies.