Curly-leaf pondweed has been identified in over 500 water bodies in Minnesota. This non-native aquatic plant is often characterized as an invasive nuisance species and during the past few years many shoreland property owners have experienced increasing problems caused by its growth and spread. Requests for information and assistance with managing curly-leaf pondweed infestations have increased over the past two years. In response, the University of Minnesota Extension Service Shoreland Education Program recently offered three workshops to help property owners, local units of government, and lake association leaders better understand how to manage this nasty invader.

Workshops in Big Lake, Nisswa, and Richfield attracted nearly 150 participants who learned about the value of preserving native aquatic plants, the life cycle and characteristics of curly-leaf pondweed, various management methods (cutting, harvesting, chemical and physical options), recent research, and the permitting process for curly-leaf pondweed control. Speakers included representatives from the University of Minnesota Extension Service, Minnesota Sea Grant, Minnesota DNR, local governments, Minnesota Lakes Association, and private consultants and lake management professionals. Lake association leaders also shared their experiences in managing curly-leaf pondweed. The take-home messages for attendees: Preventing the introduction of curly-leaf pondweed into a water body is the only real “control.” There is, to date, no “silver bullet” method of eradicating curly-leaf pondweed once it has invaded a water body. Several factors need to be considered (with the help of natural resource professionals) before selecting an appropriate management method for a lake. Management of curly-leaf pondweed is costly, ongoing, requires a DNR permit, and may alter the ecology of the lake.

These workshops were co-sponsored by the Water Resources Center, Sea Grant Program, Minnesota Extension Service, Minnesota Lakes Association, and the Initiative Foundation.

Included in this issue of From Shore to Shore is a curly-leaf pondweed identification handout for you to use, make copies, and share.

Posted in Plants, Lakes |