A recent study conducted at the Great Lakes Forestry Centre in Sault Ste. Marie, Ontario, has raised concerns regarding an invasive insect creeping closer to the Canadian border. According to Amanda Roe, a research scientist with Natural Resources Canada at the forestry centre, the spotted lanternfly, especially their eggs, has shown remarkable resilience to extreme cold temperatures, surviving as low as -25°C. This finding suggests that winter alone may not be sufficient to halt the spread of this harmful pest into Canadian territories.
Originating from Asia, the spotted lanternfly is a destructive sap-sucking insect that utilizes straw-like mouthparts to penetrate trees and plants, extracting sap. It was first identified in the United States in 2014 and has since rapidly expanded across the eastern U.S., establishing populations in 19 states, including Michigan and New York, as well as regions along Lake Erie.
The impact of this insect extends to over 100 plant species, with a focus on grape production, as stated by Olivier Morin, a plant health survey biologist from the Canadian Food Inspection Agency. Infestations in the U.S. have significantly affected vineyards and agricultural activities, leading to reduced yields and weakened crops due to massive feeding by the insect. Additionally, the spotted lanternfly excretes sugary waste called honeydew, promoting mold growth and coating surfaces.
Amanda Roe highlighted the insect’s affinity for consuming plants important to humans, emphasizing its threat to essential commodities in Canada. Notably, the maple syrup industry has been monitoring the insect’s impact on maple trees, expressing concerns about potential repercussions on maple syrup production due to the insect’s feeding habits.
While studies reveal the insect’s adaptability to cold climates, Roe emphasized the continuous evolution of invasive species in new environments. Morin pointed out that human activities play a crucial role in the insect’s spread, labeling the spotted lanternfly as an adept hitchhiker. Unlike natural dispersal, these insects travel long distances by attaching themselves to vehicles, cargo, containers, and outdoor equipment, with females laying egg masses on various hard surfaces.
Although no established populations have been found in Canada yet, the Canadian Food Inspection Agency has intercepted spotted lanternflies on shipments and vehicles arriving from the U.S. Morin stressed the importance of promptly reporting any encounters with the insect to mitigate its impact. Anticipating the inevitable arrival and spread of the spotted lanternfly in Canada, efforts are underway to slow its progression and minimize the impending consequences.