Invasive plant species, such as garlic mustard and honeysuckle, have a distinct competitive advantage over native plants. Without animals or insects from their place of origin to keep them in check, invasive plants can overrun native vegetation if not managed.
As such, invasive species take a tremendous toll on the landscape, economy, public health and recreation. For example, wild parsnip can cause burning and blistering of the skin. Invasives grow quickly, invading adjacent woodlands, natural areas and landscaped areas, out-competing desirable native species and negatively affecting wildlife habitat. Billions of dollars are spent each year in the United States on the control of invasive species (Wisconsin Department of Natural Resources, 2012).