Invasive – Eradicate
Hydrilla is an invasive species with no ecological advantages and should be eradicated upon discovery. It is on the Federal Noxious Weed List. Often times its presence remains unknown until it is too late and has created a dense coverage causing considerable problems for lakes, ponds and other waterways. Its thick mat can prevent light from reaching submerged plants causing them to eventually become eliminated as well as causing decreased recreational use. In severe cases, Hydrilla can raise the water temperature, increase pH and cause varying oxygen levels. Millions of dollars are spent annually on Hydrilla eradication and prevention. The perennial plant can grow in waters 20 feet deep, reaching the surface and then spreading laterally to form a dense mat. The blade-like leaves range from 1/8 to 3/8 inch long, with 4 to 8 leaves in a whorl. It has a rough feel with tooth-like edges. Hydrilla can be easily confused with Elodea.