A recent study conducted at the Great Lakes Forestry Centre in Sault Ste. Marie, Ontario, has highlighted concerns regarding an invasive insect encroaching closer to the Canadian border. Research scientist Amanda Roe from Natural Resources Canada revealed that the spotted lanternfly, especially its eggs, can endure extremely low temperatures, with reports showing survival at temperatures as low as -25 degrees Celsius. This resilience suggests that winter conditions may not be sufficient to deter the harmful pest from establishing populations in various parts of Canada.
The spotted lanternfly, a destructive sap-sucking insect originating from Asia, utilizes straw-like mouthparts to extract sap from trees and plants. First identified in the United States in 2014, the insect has swiftly spread across the eastern U.S., taking root in at least 19 states, including Michigan and New York, as well as communities bordering Lake Erie.
Olivier Morin, a plant health survey biologist at the Canadian Food Inspection Agency, highlighted the insect’s broad diet, affecting over 100 plant species. The primary concern lies in the impact on grape production, although other crops are also at risk. In infested regions of the U.S., vineyards and agricultural operations have suffered significant losses due to spotted lanternflies. The insects’ feeding habits reduce crop yields, weaken plants, and result in the secretion of honeydew, promoting mold growth.
Amanda Roe emphasized the threat posed by the insect’s affinity for consuming plants that are vital commodities in Canada. Notably, the maple syrup industry has monitored the insect’s activity, as it also targets maple trees. Uncertainty surrounds the potential effects on maple syrup production, given the limited understanding of the insect’s impact in these areas.
Despite insights into the insect’s cold tolerance, Roe cautioned that invasive species can adapt to new environments over time. Human activities significantly contribute to the insect’s spread, as spotted lanternflies adeptly hitch rides on vehicles, cargo, and outdoor equipment. The Canadian Food Inspection Agency has intercepted these insects on various shipments from the U.S. While no established populations have been detected in Canada, the agency remains vigilant due to the evident pressure.
To combat the spread of spotted lanternflies, Morin advised individuals to report sightings to the Canadian Food Inspection Agency, urging caution and prompt action upon encountering the insect. Vigilance and proactive measures are crucial in delaying the potential impact as the insect continues to approach and potentially infiltrate Canadian territories.