Knotweeds

Knotweeds are listed among the 100 worst invasive species by the International Union for Conservation of Nature and are considered a top-ten invasive species for control in BC. [...] Additionally, knotweed roots lack the true root hairs necessary to bind to the soil, leading to erosion and stream sedimentation along the banks of creeks and rivers where they have become established. [...] This insect feeds on the plant’s sap, damaging the areas where new growth occurs, leading to twisted and deformed leaves and an overall reduction in the plant’s size and strength. [...] Chemical Control: Before selecting a herbicide, it is essential to evaluate the site-specific characteristics and consider the overall goals and objectives for the area as these will guide the choice of herbicide and application strategy. [...] Thank you to the BC Ministry of Environment and Climate Change and the BC Ministry of Transportation and Infrastructure for providing project funding, and to those who advised the development of these management recommendations.