September 5, 2019 – The Upper Thames River Conservation Authority (UTRCA) is working with the Municipality of West Perth to remove invasive Japanese Knotweed from parkland along the Thames River in Mitchell.
Japanese Knotweed is an aggressive semi-woody perennial plant that is native to eastern Asia. In the 1800’s it was introduced to North America as an ornamental species. Japanese Knotweed is often mistaken for bamboo; however it is easily distinguished by its broad leaves and its ability to survive Ontario winters.
“Japanese Knotweed is especially persistent due to its vigorous root system, which can spread nearly 10 metres from the parent stem and grow through concrete and asphalt,” said Jay Ebel, Forestry Technician at the UTRCA. “This invader is very persistent and once it becomes established, is incredibly difficult to control.”
Mayor Walter McKenzie noted that “the Environment, Forestry and Trails Committee identified a concern with Japanese Knotweed and requested municipal funding through the 2019 budget process. The UTRCA was contacted for assistance with mapping the extent of the Knotweed patches and preparation of a management plan. West Perth is grateful for the technical expertise that UTRCA is able to offer the Municipality with addressing this environmental challenge.”
Japanese Knotweed spreads quickly, creating dense thickets that degrade wildlife habitats. It also reduces plant biodiversity by competing with other native vegetation.
UTRCA staff are cutting and treating the invasive species to limit regeneration. The site will be restored with native plant species in the future.
More Information on Japanese Knotweed
Contact: Jay Ebel, Forestry Technician, or Steve Sauder, Marketing Specialist