Research conducted at the Great Lakes Forestry Centre in Sault Ste. Marie, Ontario, has revealed new worries about an invasive bug advancing closer to the Canadian border. Amanda Roe, a research scientist with Natural Resources Canada, highlighted the resilience of spotted lanternfly eggs to extreme cold, surviving temperatures as low as -25°C. This discovery raises concerns that winter conditions may not be sufficient to halt the spread of this harmful pest in Canada.
The spotted lanternfly, a destructive insect native to Asia, uses straw-like mouthparts to feed on over 100 plant species by sucking out sap. Since its initial detection in the United States in 2014, it has rapidly expanded across the eastern U.S., establishing populations in at least 19 states, including Michigan and New York, and areas along Lake Erie.
Olivier Morin, a plant health survey biologist with the Canadian Food Inspection Agency, emphasized the significant impact the insect is expected to have on grape production. Infestations in the U.S. have caused substantial issues for vineyards and other agricultural operations, reducing yields, weakening crops, and promoting mold growth with their sugary waste known as honeydew.
Additionally, the spotted lanternfly poses a threat to maple trees, raising concerns within Canada’s maple syrup industry. The Ontario Maple Syrup Association has been monitoring the insect for several years to assess its potential impact on maple syrup production, although uncertainties remain due to the recent spread of spotted lanternflies into crucial maple-producing regions.
Despite current knowledge on the insect’s cold tolerance, Roe highlighted the adaptability of invasive species in new environments, emphasizing the ongoing risk as long as suitable food sources are available. Morin pointed out that human activities significantly contribute to the insect’s spread, noting the spotted lanternfly’s ability to hitchhike on vehicles, cargo, and outdoor equipment for long-distance travel.
While no established populations have been found in Canada yet, the Canadian Food Inspection Agency has intercepted spotted lanternflies on various incoming shipments and vehicles from the U.S. Prompt reporting of any sightings or encounters with spotted lanternflies is advised to aid in monitoring and control efforts. Morin stressed the importance of proactive measures to slow the spread and mitigate the potential impacts of the spotted lanternfly’s incursion into Canada.
