Researchers from the U.S. Army Corps of Engineers, the University of Florida, and the Connecticut Agricultural Experiment Station are beginning a new field study this summer to better understand Hydrilla verticillata subsp. lithuanica — commonly known as Connecticut River hydrilla — an invasive aquatic plant that has become a growing concern for waterbodies throughout the Northeast.
Hydrilla has already been observed in several waterbodies across Connecticut and Massachusetts, including stretches of the Connecticut River. To help guide future management strategies, researchers will be gathering detailed observational data on how the plant grows and spreads. The findings from this study are intended to support efforts to slow and ultimately minimize the spread of this invasive species.
What residents may notice: Starting in August 2026, community members may see 4–5 small yellow floats placed at designated research locations along the river. These floats mark study sites where researchers are monitoring hydrilla growth. The study will run through November 2026, at which point the floats — along with hydrilla samples — will be collected and removed.
No herbicides or dyes will be used at any point during this study
The Town thanks residents for their patience and cooperation as this important research moves forward. Questions about the study can be directed to Amber.Riner@ufl.edu.
To see the flyer for this research click here.