CT officials issue urgent plea for help stopping ‘a plague' in state waterways. Here's why and how.

Yahoo

23-05-2025

One of the state's most invasive aquatic plants is causing massive damage to the Connecticut River and officials don't want boaters and others to continue the spread of the environmental and economic scourge.
That message was loud and clear as Connecticut heads into Memorial Day weekend, both a time to honor the nation's fallen and the traditional beginning of the summer season, which includes many boats in the state's waters. Boats must be cleared of the plant to stop its spread, officials said.
Boats can spread hydrilla, the aquatic invasive species from Asia called the 'most noxious, invasive' plant ever, and it is well-known for its ability to quickly propagate and take over aquatic ecosystems. Officials fear it will damage the state's $5.5 billion recreational economy.
The plant significantly reduces water quality where it lives and spreads. By blocking sunlight, it encourages the growth of harmful algae, which can further reduce oxygen levels and produce toxins harmful to fish, wildlife, and even humans. It has caused massive damage to parts of the Connecticut River already and has been seen in other waterways.
The plant also is one of Connecticut's most costly and destructive invasive plants, and is projected to continue its spread across the Connecticut River, with the loss of federal funding to combat the highly invasive plant, officials said.
'It's an ugly and hideous looking plant,' U.S. Sen. Richard Blumenthal said Friday at Riverside Park in Hartford. 'This is probably the most invasive aquatic plant in the world and it has invaded Connecticut. It is a plague on the Connecticut River but also on our lakes, streams, coves, and tidal basins. It can survive and thrive almost anywhere because it multiplies hideously fast.'
For nearly a decade, state and federal scientists have studied the aquatic weed, looking for its vulnerabilities and why it has spread so successfully across 200 miles of the river and its tributaries in Connecticut. Hydrilla was first spotted in Connecticut in 2016 in Glastonbury, officials said.
Last year, the Connecticut Agricultural Experiment Station and U.S. Army Corps of Engineers began limited spraying of a herbicide that showed enormous potential for rooting out the invasive plant. Several areas of the Connecticut River that have been choked for years with hydrilla were cleared within days, according to officials.
But efforts to continue clearing out the river of hydrilla are now in jeopardy, officials said. Nearly $5 million in federal funds that were allocated for ongoing hydrilla removal in the Connecticut River this year have been cut by Congress, according to Blumenthal's office.
Based on last summer's successful herbicide application trials, the Army Corps planned to expand testing and increase the number of herbicide applications to about 16 locations in coming months, officials said. But the funding was removed by a continuing congressional budget resolution earlier this spring and much of what remained is impounded by the White House budget office, according to previous reporting.
'The problem is that this year for the first time the Army Corps of Engineers budget is down 44%,' Blumenthal said. 'But the good news is, I believe, we have bipartisan support for a $5.5 million dollar fund in 2026 to combat hydrilla. Because it is such a threat to not just the Connecticut River, but to all the lakes and streams where boaters may go.'
Blumenthal was flanked by several state officials at Friday, including Michael Zaleski, president and CEO of Riverfront Recapture; Rhea Drozdenko, River Steward, Connecticut River Conservancy; Dr. Jason White, director of the Connecticut Agriculture Experiment Station; Margot Burns, Senior Environmental Planner at RiverCOG; and Justin Davis, Acting Deputy Director of the state Department of Energy and Environmental Protection.
'We're at the start of Memorial Day weekend and that also starts the unofficial beginning of boating season in Connecticut,' Davis said. 'We here at CT DEEP encourage anyone fortunate enough to have a boat, to get out and have fun this summer, on the beautiful waterways of Connecticut. But to also do so in a safe and responsible manner and part of that is making sure you're not contributing to the spread of invasive species like hydrilla.'
Davis said that boaters should follow state protocols and always inspect their boats for any vegetation before entering the water. Upon leaving the water, boaters should drain all the water out of their boat and let it fully dry. DEEP officials said they recommend letting a boat dry for five days before re-entering a body of water.
'This is a hugely important issue as there is a major economic impact,' Davis said.
'We have a $5.5 billion dollar recreation economy in Connecticut and fishing and boating is the biggest part of that economy. Hydrilla is a major threat to our waterways and Connecticut's recreation economy.'
Scientists for years have studied hydrilla; until very recently believed to be confined to southern states, where it has clogged ponds and blocked rivers for decades. In 2016, amateur botanists found what they considered an odd weed growing in a river spur called Keeney Cove in Glastonbury.
Not only was the weed found to be hydrilla, but DNA testing revealed it to be a genetically unique strain not known elsewhere. In the years since, hydrilla has spread explosively to cover more than 1,000 acres of river and tributaries and jump, carried by the boats and trailers of anglers, to many of the state's lakes and ponds.
Edmund H. Mahony contributed to this story. Stephen Underwood can be reached at [e-mail]