The spotted lanternfly has been detected in Canada for the first time, with the Canadian Food Inspection Agency confirming the finding in Windsor, Ontario, on September 15, 2026. The CFIA alert provides reporting guidance for the detection.
The detection marks a significant change in Canada’s efforts to keep the invasive insect from becoming established. The CFIA says surveillance is continuing around Windsor to determine the extent of the detection and decide what further action may be required.
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What the Windsor detection means
The CFIA has not confirmed an established reproducing population of spotted lanternfly in Canada. The agency is examining the Windsor area to determine whether the insect represents an isolated introduction or a broader presence.
Movement restrictions have been put in place for regulated materials, including potentially infested plant material. The CFIA’s response framework also identifies vehicles, shipping containers, outdoor equipment, household goods and other items as possible ways for the insect to hitchhike to new locations.
Spotted lanternfly has been regulated in Canada since 2018 because of the potential risks to grape production, fruit trees, ornamental plants and forestry. The insect is native to Asia and was first detected in the United States in 2014.
Why officials are concerned about spotted lanternfly
The insect feeds on plant sap. It can attack more than 100 plant species, although the most significant agricultural impacts have been observed in grapevines. Feeding damage can weaken plants, while the insect’s honeydew excretion can encourage the growth of sooty mould on leaves, stems and nearby surfaces.
Potentially affected sectors include vineyards, fruit growers, nurseries, forestry operations and homeowners with susceptible trees and plants. Natural Resources Canada’s guide identifies grapes, hops, fruit trees and a range of forest trees among the insect’s hosts.
The tree-of-heaven is one of the spotted lanternfly’s preferred host plants. Ontario warns that the invasive tree can help support the pest’s spread and is encouraging attention to both species.
How to identify the insect
Adult spotted lanternflies are visually distinctive. They have spotted forewings and bright red underwings that are visible when the wings are open. Younger nymphs can appear black and white, later developing red markings.
Egg masses are laid in late summer and can survive winter before hatching in spring. They may be attached to trees, vehicles, patio furniture, outdoor equipment, trailers, firewood and other relatively flat surfaces.
A suspected sighting should not be treated as confirmation. Several insects can resemble spotted lanternfly at different life stages, so photographs and specimens are important for official identification.
What Canadians should do if they see one
The CFIA is asking people who believe they have found a spotted lanternfly or egg mass to take a photograph or video and report the sighting immediately. The agency may contact the person for additional information or arrange to collect the insect.
The agency also advises people returning from affected areas in the United States to inspect vehicles, campers, trailers, recreational vehicles and outdoor equipment before travelling back to Canada. Items stored outside should be checked for egg masses before they are moved.
- Take clear photographs from several angles.
- If it is safe to do so, place the insect in a sealable container.
- Do not move plants, firewood, equipment or outdoor furniture unnecessarily.
- Check vehicles and camping gear after travelling through affected areas.
- Report the sighting to the CFIA rather than relying only on social media identification.
What happens next
The immediate priority is determining whether spotted lanternfly is present beyond the confirmed Windsor location. The CFIA’s response framework allows for additional surveying, insect collection, efforts to slow spread and, if necessary, the designation of a regulated area.
Officials have previously received reports and interceptions of spotted lanternfly in southeastern Canada, but the September 2026 Windsor finding is the first confirmed Canadian detection identified by the CFIA on its current public alert.
For residents, the key message is simple: do not transport a suspected insect or egg mass, document what was found and report it promptly. Early detection can give authorities more options to contain an invasive pest before it becomes established.
Frequently Asked Questions
Where was spotted lanternfly first detected in Canada?
The Canadian Food Inspection Agency confirmed Canada’s first detection in Windsor, Ontario, on September 15, 2026.
Is spotted lanternfly established in Canada?
The CFIA has confirmed a detection but has not confirmed an established reproducing population in Canada.
What does a spotted lanternfly look like?
Adults have spotted forewings and red underwings, while younger nymphs may be black and white or black, white and red.
How should I report a suspected spotted lanternfly?
Take clear photos or video, safely preserve the insect or egg mass if possible and report it immediately to the CFIA.
Can spotted lanternfly harm people?
The main concern is damage to plants and agricultural production. The insect is considered a plant pest rather than a direct human-health threat.
Fact-Checked: Key facts were checked against current Canadian Food Inspection Agency, Natural Resources Canada and Ontario government information.
Disclaimer: This article provides general reporting and identification guidance; suspected sightings should be confirmed by the Canadian Food Inspection Agency.