What is the major watermilfoil of concern in the United States?

The major watermilfoil of concern in the United States is Eurasian Watermilfoil. This invasive species has significant ecological impacts, as it can grow rapidly and densely in water bodies, outcompeting native aquatic plants and altering habitats. Its aggressive growth can lead to the formation of thick mats that disrupt recreational activities like swimming, boating, and fishing, as well as impacting water quality by affecting oxygen levels in the water.

Eurasian Watermilfoil can also hinder the growth of native fish species by providing less suitable habitat as it alters the entire aquatic ecosystem. Its resilience to various control methods further complicates management efforts, making education and awareness critical in preventing its spread. This particular species presents a greater challenge compared to others, such as native or Kentucky Watermilfoil, which either do not have the same invasive characteristics or have been less problematic within U.S. waterways.