Targeted control of invasive Phragmites (Phragmites australis subsp. australis)
The Minnesota Department of Natural Resources (MNDNR) and the University of Minnesota (U of M) are working to facilitate control of invasive, nonnative Phragmites throughout Minnesota, which is also home to a widespread native subspecies of this grass that is an important component of the state’s wetlands and shorelines. This effort relies on collaboration with state, county, and local municipalities and contractors who conduct the treatments. Private landowners play an important role when they recognize invasive Phragmites, report it, and permit access for treatment.
To date, approximately 1,690 populations have been documented. Although that number is large, and has increased since the program began, the extent of invasive Phragmites is still relatively small, encompassing about 170 acres. Populations in some regions were already being managed by local authorities, while management in other regions is benefiting from this coordinated treatment program. To date, approximately 71% of known populations in the state have been treated at least once. Work in 2023 will include monitoring previously treated populations and conducting follow-up treatments as needed, along with implementing first-time treatments on additional populations. The goal is to ensure that all populations are under management to prevent further spread and protect Minnesota’s aquatic resources (and transportation and agricultural infrastructure) from this invasive subspecies. If you have questions about the invasive Phragmites control program, please contact us at [email protected].