Ontario agriculture officials are warning residents to stay alert after multiple sightings of the spotted lanternfly, an invasive insect considered a serious threat to vineyards, orchards and nursery crops across the province.
The pest, native to Southeast Asia, has already spread through parts of the northeastern United States and is known for feeding on more than 100 species of trees and plants. Experts say Ontario’s grape and fruit sectors could face significant damage if the insect becomes established locally.
According to the Canadian Food Inspection Agency, there is currently no confirmed breeding population in Canada, but several sightings have been reported in southern Ontario over the past six months. Confirmed finds include dead insects in St. Catharines and Windsor, along with live sightings in Fort Erie, Amherstburg, Tecumseh and LaSalle.
The insect begins life as eggs that hatch in May, then develops through several nymph stages before becoming a winged adult by summer. Mature lanternflies are about one inch long, with grey spotted wings and striking red underwings visible in flight.
Agricultural concern is especially high for grapevines and young fruit trees. Heavy feeding can weaken plants, stunt growth and in severe cases kill saplings. Ontario’s wine industry, tree fruit growers and ornamental nurseries are considered particularly vulnerable.
Residents are being asked to report any suspected sightings immediately. If safe to do so, take a photo or video, capture the insect or scrape egg masses into a sealed container, and submit the report to the CFIA.
Travellers returning from U.S. states where the insect is established are also urged to inspect vehicles, trailers, camping gear and outdoor equipment for hidden egg masses before crossing back into Canada.
With Ontario’s agriculture sector contributing billions to the economy, early detection could be critical in preventing a much larger infestation.