A recent spotted lanternfly discovery in St. Catharines, Ont., is renewing concern about the destructive insect reaching Canada from the United States. There are no established populations of spotted lanternfly in Canada — meaning no confirmed reproducing populations in the wild — but experts say the invasive insect still poses a serious threat to vineyards, fruit trees and hardwoods because it feeds on plant sap and can kill grapevines. Last month, Ontario resident Aidan Dagg found a dead spotted lanternfly and uploaded it to iNaturalist, a social network and mobile app where people post and identify plants and animals. Dagg, who works as an inspector at a nursery in St. Catharines, had been on the lookout for the insect for the past few years. This was the first time he had found one.