Since 2017, SCLA leaders, volunteers, and lake biologists have focused on the threat of Yellow Flag Iris to the Spider Chain of Lakes. We hope you will be part of the solution.
Yellow Flag Iris is present and expanding in the Spider Lake Chain. It is a fast-growing and fast-spreading invasive which can outcompete other wetland plants, forming almost impenetrable thickets in much the same way that cat-tails do. Small clumps can be dug out, though this is only effective if the rhizomes are entirely removed. Mowed plants will regenerate from the rhizomes, so plants must be cut multiple times to exhaust their energy reserves. The sap may cause skin irritation, so gloves should be worn when handling cut or otherwise damaged stems.
Yellow Iris can be controlled by glyphosate-based herbicides. Plants growing near standing water should be treated with an herbicide approved for aquatic use to minimize harm to amphibians.
No effective biological control agent is known at this time.
WHAT YOU CAN DO TO Help:
Tell us your property location, and site of Yellow Flag Iris on your property. We will ask volunteers to check your property and remove plants from your shoreline.
“The High Cost of War,” by Jim Brakken of the Bayfield County Lakes Forum