This is an exotic plant, introduced to the U.S. in the 1940's by the aquarium industry. It is rapidly becoming a major nuisance throughout North America. It is capable of rapid spreading, mainly by fragmentation of plant parts. Each fragment is capable of growing roots and eventually developing into new plant. Removal of fragments from boat trailers and along shorelines is advised to prevent its spread into new areas. Eurasian Milfoil is quite competitive with native species and may completely dominate a pond or lake within a few years after introduction. Due to the plant's ability to form dense growths, water use activities may become severely impaired. These plants are of little value to wildlife or fisheries.