A Burdock patch cut back in PPP (HRM 2010) Large rhubarb-like Burdock leaves can shade-out Acadian Forest plants. (HRM 2010) |
Common Burdock Control Common Burdock (Arctium minus) is an invasive biennial/short-lived perennial plant that grows up to 2 metres in height with showy pink/magenta flowers resembling those of the thistle, and large rhubarb-like leaves. Native to Europe and Asia, the plant has been known in Canada for almost 250 years. Common Burdock is typically found along roadsides, in waste places, open woods, disturbed areas, along paths and along animal trails. Why Control It? Much like other invasive species, Common Burdock can quickly take over areas, pushing-out Acadian Forest plants, and lowering the biodiversity of the park. Its large rhubarb-like leaves shade the soil and inhibit the growth of other more desirable groundcovers. A typical burdock plant will produce around 15,000 seeds that are easily distributed by birds and other animals. Since the plant reproduces only by seed, cutting down plants before they bloom is the best way to control burdock in Point Pleasant Park. Although the roots of some burdock plants may live up to 5 years, cutting the plant on a yearly basis will greatly reduce the number seeds released in the park, and will gradually weaken the burdock root until it dies. Digging the root of the plant is not advised because it grows deep into the soil. How Will We Control It? Park staff will be cutting back plants over the next few weeks as they go about regular maintenance work in the park. The cut plants will be left on the forest floor to return to the soil as compost. Are you interested in reading more about Common Burdock? Web Resources
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