On June 13 and 14, Facilities Management Outdoor Services will conduct a targeted application on Japanese knotweed (Fallopia japonica), which has been identified along the Boulder Creek Path between 17th Street and Folsom Street. Work will occur primarily in the area of Grandview Avenue near Athens North and the Athletics Practice Field, as well as closer to Folsom Street.
Japanese knotweed, which is native to Asia, are bright green, bamboo-like perennial plants that grow 5–16 feet tall. Infestations can clog small waterways and displace native vegetation, increasing bank erosion. Because they can spread and resprout from roots or root fragments, hand pulling is not considered an acceptable treatment methodology by the Colorado Department of Agriculture. Japanese knotweed is designated as a “List A” species in the Colorado Noxious Weed Act, and this invasive species is required to be eradicated wherever it is found in the state.
The applications will occur in the morning before the temperature climbs on June 13 and 14, depending on the weather. The product being used, Vastlan, is a selective post-emergent herbicide with an EPA Reg. No. 62719-687. Guidelines for pesticide use are described generally in the campus Pest Control Policy. Because of the aggressive nature of this particular invasive species, future applications will likely be required, and the area will be monitored for several years.
An outside vendor, Habitat Management Inc., has been hired to conduct the applications based on their demonstrated track record of conducting targeted applications on invasive plant species, along with their current relationship with the city of Boulder for invasive weed control.
To further ensure the highest standard of health and environmental protection, Facilities Management staff will accompany the contracted applicators to ensure only predetermined locations receive a treatment, applications are stopped during high wind gusts and/or sustained wind events, applications are halted as pedestrians pass by and that all necessary precautions are taken to avoid non-target impacts.
Yellow application notice flags will be placed to indicate where the application was made. Law requires that these flags remain in place for 24 hours after an application has been made.
If you have any questions or concerns, please contact Jessica Bradley, director of Facilities Services.