Research conducted at the Great Lakes Forestry Centre in Sault Ste. Marie, Ontario, has raised fresh concerns regarding an invasive insect that is edging closer to the Canadian border. According to Amanda Roe, a research scientist from Natural Resources Canada stationed at the forestry centre, recent findings indicate that the spotted lanternfly, especially their eggs, can endure extremely low temperatures. Studies have revealed that these eggs can survive temperatures as low as -25 degrees Celsius, suggesting that winter conditions may not sufficiently hinder the spread of this harmful pest into certain parts of Canada.
The spotted lanternfly, an invasive species native to Asia, is a destructive insect that uses straw-like mouthparts to suck sap from trees and plants. Initially discovered in the United States in 2014, the insect has rapidly expanded across the eastern U.S., establishing populations in at least 19 states including Michigan and New York, as well as communities along Lake Erie.
Olivier Morin, a plant health survey biologist at the Canadian Food Inspection Agency, highlighted that the spotted lanternfly feeds on over 100 plant species, with a significant impact expected on grape production. In infested areas of the United States, vineyards and agricultural operations have suffered significant damage due to the insect’s feeding habits. Large numbers of spotted lanternflies feeding on plants can lead to reduced yields and weakened crops, while their sugary waste, known as honeydew, promotes mold growth on surfaces.
Amanda Roe emphasized that the insect’s appetite extends to maple trees, which has implications for Canada’s maple syrup industry. The Ontario Maple Syrup Association has been monitoring the spotted lanternfly for three years to assess potential risks. Uncertainty remains about the insect’s impact on maple syrup production since populations of the spotted lanternfly are relatively new in areas where maple syrup is a vital activity.
While recent studies have shed light on the insect’s cold tolerance, Roe cautioned that invasive species can adapt to new environments over time. Human activity plays a significant role in the insect’s spread, as spotted lanternflies are adept hitchhikers, often traveling long distances by attaching themselves to vehicles, cargo, and outdoor equipment. The Canadian Food Inspection Agency has intercepted spotted lanternflies on various shipments and vehicles entering from the United States, indicating a looming threat of establishment in Canada.
Morin advised individuals who encounter spotted lanternflies to document and report their findings to the Canadian Food Inspection Agency. He stressed the importance of proactive measures to slow the spread of the insect and mitigate its potential impacts as it approaches and potentially infiltrates Canadian territories.
