Some forestry experts say that garlic mustard has left a foul taste in their mouths.
The plant is not native to Wisconsin but it has become common in the southern part of the state.
Now they say the plant is creeping northward and it is choking out native plant life in its way.
The University of Wisconsin-Stevens Point has now kicked off a tracking program that will chart the plant's progress. They are to finish the project at the end of June.
University forest education specialist Jeremy Solin says the garlic mustard plant is so fierce it out-competes everything in its way, including trees, seedlings, wildflowers and other plants.