Thank you!
Your support is sustaining the future of local news in our communities.

The hydrilla menace: 2025 marked a turning point

The hydrilla menace: 2025 marked a turning point

A boater prepares to launch from O’Hara’s Landing at East Twin Lake this past summer, near the area where hydrilla was first discovered in 2023.

By Debra Aleksinas

SALISBURY — After three years of mounting frustration, costly emergency responses and relentless community effort, 2025 closed with the first sustained signs that hydrilla — the aggressive, non-native aquatic plant that was discovered in East Twin Lake in the summer of 2023 — has been pushed back through a coordinated treatment program.

The Twin Lakes Association (TLA) and its coalition of local, state and federal scientific partners say a shift in strategy — including earlier, whole-bay treatments in 2025 paired with carefully calibrated, sustained herbicide applications — yielded results not seen since hydrilla was first identified in the lake.

The arc of the problem

The Connecticut River strain of hydrilla at East Twin Lake, first detected near O’Hara’s Landing Marina, is an unusually robust variant that quickly triggered emergency removals, diver searches and spot treatments, as TLA officials scrambled to contain fragments capable of rapidly sprouting into new beds.

By 2024, the cost of fighting the invader had grown significantly, straining both community and association budgets as managers moved from isolated spot treatments to serial applications and broader planning efforts. Monitoring and repeated partial treatments that year helped prevent larger outbreaks but failed to eliminate the plant.

“It became pretty clear that the Whack-a-Mole strategy wasn’t going to work,” said George Knoecklein of Northeast Aquatic Research, the TLA’s limnologist.

A strategic pivot in 2025

Drawing on lessons from earlier seasons, TLA leaders and limnologists adjusted their approach in 2025. Instead of reactive, site-by-site responses, the association began the season with a planned, sustained dosing of the northeast cove of East Twin Lake and the lake’s full littoral zone beginning in late May, maintaining low, permitted concentrations of the systemic herbicide fluoridone throughout the growing season.

Operationally the work involved close tracking of application tracks, repeated water sampling to confirm target concentrations, and diver-assisted surveys in deeper water to find any remaining pockets.

The payoff: hydrilla retreated in 2025

By mid-summer and into early August, field surveys and association updates reported a dramatic decline in visible hydrilla within the lake.

At the TLA’s annual August meeting, association leaders described the season as “the first good news we’ve had in three years,” while cautioning that the victory is fragile and requires continued monitoring and rapid response to any new fragments or regrowth.

At the annual meeting, it was announced that the final two planned applications of the herbicide Sonar would not be needed. The slow-release pellets currently in the water are expected to remain effective, reaching the target duration of 120 days.

TLA officials reported that East Twin Lake is closer than ever to achieving a functional eradication of the invasive plant infestations.

They emphasized, however, that this progress has been made possible through continued funding, permitting, and close coordination with state partners. The success of this effort could also provide valuable insights for addressing similar challenges in other lakes affected by the Connecticut River strain.

Why this year’s approach mattered

Several elements distinguished the 2025 season: an earlier start to herbicide applications, sustained low-level dosing, frequent monitoring, and data-driven coordination among the TLA, its limnologist, state and federal agencies, and contractors.

The payoff came at a price: three years of repeated interventions had driven lake management expenses sharply higher, and the 2025 season required continued fundraising and justification to town and state stakeholders.

The wider use of herbicides in waterways remains controversial in some quarters, and TLA officials stressed that the treatments used in East Twin were done under state permits with scientific oversight — and that results would be shared cautiously as case studies for other affected lakes.

What comes next

TLA and partners made clear the 2025 results are cause for cautious optimism, not celebration.

The next steps include diver-assisted surveys of deepwater areas to check for any surviving turions or isolated plants; continued low-level surveillance and rapid spot treatment to snuff out any reappearance and sharing methodologies, and monitoring data with neighboring lake groups and state programs to refine best practices for tackling the Connecticut River strain.

The lake association’s Fall newsletter reported that while treatment costs are expected to be moderate in 2026, “the heightened level of surveillance will continue.” The TLA predicted $400,000 will be spent on lake management next year.

By the end of 2025, what began as an emergency discovery in East Twin in 2023 had evolved into a test case for a new, more intentional treatment model. The TLA and its partners achieved the first season in which hydrilla substantially receded in the lake — a breakthrough that shows the combination of early action, sustained dosing and disciplined monitoring can work against this particularly aggressive strain.

That success, however, comes with an explicit rider: vigilance, funding and science-backed management must continue if the Twin Lakes are to remain hydrilla-free.

Latest News

“The Divine Sister” comes to Sharon Playhouse for one-night benefit
Playwright and performer Charles Busch is “The Divine Sister.”
Provided

Continuing a popular tradition, the Sharon Playhouse will present a one-performance-only staged reading of “The Divine Sister,” another riotous comic romp by the acclaimed playwright and performer Charles Busch, on Friday, Aug. 28 at 7 p.m.

The play is a wild and witty homage to Hollywood films that feature nuns — from “The Song of Bernadette” and “The Bells of St. Mary’s” to “The Singing Nun” and “The Sound of Music.” It is classic Charles Busch: wickedly funny, gloriously over-the-top and overflowing with theatrical joy.

Keep ReadingShow less

KK Kozik sees things differently

KK Kozik sees things differently

KK Kozik in her studio

Natalia Zukerman
Maybe it takes the ability to interpret what you’re looking at to really see.
— KK Kozik

KK Kozik has a theory about getting older.

“I don’t think you have eyes to see until you have eyes to see,” said the painter. “And maybe it takes the ability to interpret what you’re looking at to really see, and maybe that’s what comes with wisdom.”

Keep ReadingShow less
Lakeville Open Horse Show returns for 69th year

Jazzmine Bone and A Stitch in Tyme power through the Gambler’s Choice run during the 2024 Lakeville Open.

Caitlin Von Graf

For nearly seven decades, the Lakeville Open Horse Show has brought riders, horses and spectators together for a day of competition and community.

This year’s show takes place on Sunday, Aug. 30, at Riga Meadow at Coole Park, 1031 Bengal Amenia Road in Millbrook.

Keep ReadingShow less
google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.

A new home for contemporary music in Connecticut

This year, the ARChive of Contemporary Music, or ARC, is moving its collection to a permanent home in Ridgefield, Connecticut.

ARC is somewhat hard to imagine. Comprised mainly of huge collections from musicians, archivists, and DJs, it has compiled more than three million sound recordings, consisting of over 90 million songs.

Keep ReadingShow less
A Vietnamese water puppet musical returns to the quarry where it began

“The Magnificent Ms. Pham” combines Vietnamese water puppetry, shadow theater, music and storytelling.

Provided

“The Magnificent Ms. Pham,” the first Vietnamese American water puppet show, is returning to the water where it was born. The perpetual motion puppet show will be at TurnPark Art Space in West Stockbridge, Mass., Aug. 28 and 29, following a sold-out New York City premiere earlier this year. The production was originally developed at TurnPark, where its puppets first danced across the surface of the quarry lake.

Created by Vietnamese American artist Tommy Nguyen and director and designer Doug Fitch, the production tells the story of Nguyen’s mother, Kim Pham, and her journey from Vietnam to the United States. The story moves between memory, Vietnamese history and mythology, and the realities of immigration, following Kim from her childhood in Vietnam through her escape as a “boat person” and eventual life in Houston, Texas.

Keep ReadingShow less
Barry Blitt draws for the Northwest Connecticut Arts Council

Cartoonist Barry Blitt created a design for a limited edition T-shirt for Northwest Connecticut Arts Council fundraiser.

Jennifer Almquist

A drawing by Barry Blitt is recognizable from a distance simply for his line quality and hint of watercolor. Known for his scathing political cartoons, this longtime cover illustrator for the New Yorker has leaned his shoulder in to support the NWCT Arts Council and its Aug. 29 fundraiser at Buck’s Rock Camp in New Milford. Blitt created a design for limited-edition T-shirts that will be available for sale at the event and online at artsnwct.org.

David Remnick, editor of the New Yorker since 1998, called Blitt “One of the greatest political cartoonists of our time.” A native of Canada, Blitt won a Pulitzer Prize for editorial cartooning and has created more than 100 covers for the New Yorker since 1992. Perhaps most memorable is his 2008 iconic fist bump between Barack Obama and Michelle Obama, “The Politics of Fear.” A quarter century of his sketches and drawings are collected in “Blitt: In One Eye and Out the Other,” published by Penguin Putnam. He has created books for children, including “George Washington’s Birthday” and “Once Upon a Time, the End, (Asleep in 60 Seconds).”

Keep ReadingShow less
google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.

google preferred source

Want more of our stories on Google? Click here to make us a Preferred Source.