Are most watermilfoil species considered to be exotic plants that require management?

The understanding that most watermilfoil species are not considered exotic plants that require management is based on the native versus non-native status of these species. Many species of watermilfoil, particularly the common watermilfoil (Myriophyllum spicatum), are known to be invasive and can disrupt local ecosystems. However, there are also native watermilfoil species that play important roles in their ecosystems and do not require the same level of management as their invasive counterparts.

In Michigan, for example, it's essential to differentiate between native and non-native watermilfoil species when assessing management needs. While invasive species like the Eurasian watermilfoil are indeed problematic and necessitate management efforts, the existence of native species complicates the blanket assumption that all watermilfoil needs control. Thus, stating that most watermilfoil species require management overlooks the complexity of their ecological roles and statuses.