One of the most persistent invasive plant species in New Hampshire is also widely regarded as one of the most beautiful. In fact, purple loosestrife has been called ?the beautiful killer.? ?Killer? because the purple flowering plant can completely take over a wetland, killing off all other species. In recent years, however, state biologists have begun to successfully fight back. Their weapon is a tiny brown beetle. N-H-P-R?s Doug Macpherson reports.
