Idaho in Action / Aquatic Invasive Species / Hydrilla


Hydrilla (Hydrilla verticillata) is one of the most aggressive and environmentally disruptive aquatic plants in the world. This invasive plant forms dense monocultures that restrict water flow, degrade water quality, impede recreation, and out-compete native species.

Hydrilla has been referred to as the “perfect aquatic weed” because of its ability to dominate aquatic systems through efficient propagation and colonization. Due to these characteristics, the identification of hydrilla in Idaho is of particular regional concern because of the potential to spread downstream into the Snake and Columbia River systems.


+ Photo Credits

Bethany Muffley, ISDA / Jason Parker, Twin Falls County Weed Control / (hydrilla close-up) Vic Ramey, University of Florida/IFAS Center for Aquatic and Invasive Plants.