In the first of its kind in the United States, a study of the of copper-based pesticide in open water systems being used in Lake Minnetonka to address the invasive zebra mussels. The Minneapolis Star-Tribune recently reported on the project that also involves investigators from the Minnesota Aquatic Invasive Species Research Center. It is the first such study of its kind in the United States. The approach is fairly simple. Investigators are using the pesticide on six test areas over a period of months. They’ll continue to visit and gather water samples in the regions to see how the treatment is doing.