Report of Japanese stiltgrass in Southern Ontario
Information provided by the Canadian Food Inspection Agency
The Canadian Food Inspection Agency (CFIA) has confirmed the presence of a population of Japanese stiltgrass (Microstegium vimineum) in Southern Ontario. This invasive plant is regulated as a pest under the CFIA’s Plant Protection Act. This is the first known occurrence of this plant species in Canada. The site is under official control by the CFIA with collaboration from partners with the aim to prevent further spread.
Japanese stiltgrass is an annual grass that is native to Asia. It can colonize a variety of habitats, including forests, wetlands and disturbed areas. This plant's prolific seed production and rapid growth helps it to dominate entire habitats, edging out native vegetation. As it spreads, Japanese stiltgrass displaces nesting sites for birds and other wildlife. The seeds of this plant can be spread via muddy tires, equipment and footwear, and by attaching to clothing or animal fur. Additional impacts of Japanese stiltgrass include control costs and environmental productivity losses.
The goal is to limit the spread of this invasive plant in the area. Please contact your local CFIA office if you think you have found Japanese stiltgrass or other regulated invasive plants. The CFIA will follow-up to determine if further action is needed.