The Hydrilla Menace: Twin Lakes group buoyed by DEEP’s assault on invasive hydrilla in 2025

The Hydrilla Menace: Twin Lakes group buoyed by DEEP’s assault on invasive hydrilla in 2025

A detail of a whorl of hydrilla pulled from the shallow waters at O’Hara’s Landing Marina in fall of 2024.

Photo by Debra A. Aleksinas

SALISBURY — The Twin Lakes Association is taking an earlier and more aggressive approach to fighting the spread of invasive hydrilla in East Twin Lake by dosing the whole northeast bay, from May through October, with low-level herbicide treatments instead of spot treatments.

The goal, said Russ Conklin, the TLA’s vice president of lake management, is to sustain herbicide concentration over the 2025 growing season.

That plan of attack will continue over a period of 60 to 90 days beginning May 21, Conklin explained during the association’s April 30 membership meeting via Zoom which drew 60 attendees.

TLA officials were encouraged by the chance to stop the spread and hopefully destroy the thick mats of the unyielding invasive plant hydrilla verticillata, referred to as the Connecticut River variant, after two years of chasing new growth around the lake’s north bay.

Dense patches were first discovered in the summer of 2023 in shallow waters around O’Hara’s Landing Marina and the nearby state boat launch and the plant has since migrated further into East Twin, following a pattern of boat traffic.

Past treatment efforts were hampered by delayed permits from the state Department of Energy and Environmental Protection to treat the hydrilla with herbicides in an area where a rare plant had been identified.

This year, the TLA was granted an exception by DEEP, said Conklin, as any protected plant species in the path of hydrilla would likely not survive anyway.

“It is not dead now, but it is going to be if we don’t do something about the hydrilla.”

“This is a big year for us,” Conklin said. “Hydrilla is a real threat to the lake, and we did treat it this past year, but the permits only applied to the plant, so we spot treated it … and were always chasing it.”

The course of action this year, he said, is to treat the entire northeast bay with the herbicide Sonar in both liquid and crystal form at a very low levels so that the herbicide’s contact time with hydrilla will be extended for a longer period over 60 to 90 days.

“We know from past experience that it is much easier to kill the plant when it’s small,” Conklin explained. The goal, he said, is to attack the stringy, green weed before August when it crowns and splits into numerous growing points that are capable of growing at the rate of an inch a day.

During the hour-long meeting, discussion also focused on a pilot program for enhanced cyanobacteria monitoring at Twin Lakes to be headed by TLA director Jessica Swartz, a resident of West Twin Lake and biotech executive with Pfizer.

“It’s very visibly challenging to identify cyanobacteria blooms,” Swartz explained, as it can easily be confused with pollen on the surface of the water, dead vegetation or different types of algae.

Cyanobacteria, also known as blue-green algae, are natural, important phytoplankton in lake ecosystems. Dense blooms, which release toxins, occur when there is an abundance of sunlight, elevated phosphorus levels and warm temperatures.

Given the current escalation in overly-nutrient rich waterbodies and rising temperatures due to global climate change, the frequency of cyanobacteria blooms is increasing, said Swartz, and Twin Lakes has occasionally experienced localized blooms.

As a result, the association will be implementing a pilot testing program with greater frequency and at more locations than currently conducted by the TLA’s limnologist, George Knoecklein. The goal of the pilot program is to work out the process of collecting reliable data over time that helps inform whether cyanobacteria blooms are occurring, where they are most frequently found, and assess the level of risk.

Sample test kits have been ordered for five or six testing sites across East and West Twin, including at the private Salisbury School.
TLA president Gant Bogle invited Swartz to give an update at the association’s upcoming June 14 membership meeting at Camp Isola Bella.

Despite rising lake management costs projected at $500,000 this year, Bogle reported that the TLA is in strong shape financially heading into the 2025 season, as it received another $75,000 grant from DEEP and $25,000 from the Bates Foundation to support the Watershed Study.

Also, the town of Salisbury has earmarked $75,000 for Twin Lakes this season, said Bogle, and the TLA membership has “responded generously” contributing more than $300,000 since August 2024 when the group started its 2025 fundraising campaign.

Bogle also encouraged members to attend the May 12 public meeting of the Salisbury Inland Wetlands & Watercourses Commission, which is expected to address proposed changes to the Upland Review Area encompassing the town’s lakes.

Latest News

Rural towns plagued by slow EMS response times

Dutchess County Emergency Medical Services Commissioner William Beale addresses the County Legislature's Public Safety Committee during a meeting in Poughkeepsie on Wednesday, March 4.

Photo by Aly Morrissey

Ambulance response times to life-threatening emergencies in parts of northeastern Dutchess County were among the slowest in the county last year, according to newly released county data. Region 5, which includes Amenia, Dover, North East and the Village of Millerton, ranked last among the county’s seven EMS regions for the percentage of life-threatening calls reached within nine minutes — a benchmark widely used to measure acceptable response times.

The poor ranking comes even after Dutchess County spent roughly $4 million over two years on a supplemental emergency medical service program intended to improve coverage and response times.

Keep ReadingShow less
‘Maple Syrup Madness’ draws visitors to Trevor-Lovejoy Zoo for sweet treats

Dan Cohen, left, dispenses whipped cream on a plate of maple syrup treats during a demonstration on the making of maple syrup at Trevor-Lovejoy Zoo on Millbrook School’s campus.

Photos by Aly Morrissey

MILLBROOK — The Trevor-Lovejoy Zoo hosted its sixth annual Maple Syrup Madness Weekend on March 7 and 8, drawing visitors eager to sample fresh maple syrup, learn about the sugaring process and enjoy one of the region’s sweetest seasonal activities. The event will continue March 14 and 15, as long as the sap continues to flow, organizers said.

Visitors were treated to free tastings of locally made maple syrup with a side of waffles, while Alan Tousignant — a woodworker, syrup maker and director of the Trevor-Lovejoy Zoo — led demonstrations showing how sap collected from nearby maple trees is transformed into syrup.

Keep ReadingShow less
Stolen stroller returned to owner after grassroots recovery effort

Relief Chiropractic and Wellness on South Center Street in the Village of Millerton, where a stroller was reported stolen and later returned after Tyler Van Steenbergen

MILLERTON — News of a stolen stroller swept through Millerton last week after a grassroots effort to recover the expensive baby equipment gained traction on Main Street and social media.

The stroller, an UPPAbaby Vista model — widely considered a high-end brand and valued at more than $1,000 — was taken from outside Relief Chiropractic and Wellness on the corner of Main Street and South Center Street before it was anonymously returned the following day.

Keep ReadingShow less
google preferred source

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

Stanford parents call for more representation in school closure talks

Cold Spring Early Learning Center on Homan Road in Stanford. Pine Plains school district officials proposed closing the building last year citing budget constraints and declining enrollment.

Photo by Nathan Miller

STANFORD — Community members gathered on Wednesday, March 4, for a first look at a newly-formed committee that will analyze the impact of closing an elementary school building in the Pine Plains Central School District.

Town Supervisor Julia Descoteaux arranged the Wednesday meeting at Stanford Town Hall to find volunteers to represent the town in the district-wide Building Utilization Advisory Committee. The committee's first district-wide meeting is scheduled for Thursday, March 12.

Keep ReadingShow less

Accuracy and reputation key to local news

Accuracy and reputation key to local news

Publisher James Clark, left, and Executive Editor Christian Murray speak at Scoville Memorial Library March 7.

Photo by Patrick L. Sullivan

SALISBURY — What makes or breaks a local newspaper is its reputation, Lakeville Journal Executive Editor Christian Murray said at the Scoville Memorial Library Saturday, March 7.

Murray and publisher James Clark led a discussion at the library that was originally scheduled for January, but the weather intervened.

Keep ReadingShow less
Library building expected to reopen one month after burst pipe floods basement

The Millerton fire crew watches a pump hose carry water from the NorthEast-Millerton Library’s basement on Tuesday, Feb. 10.

Photo by Nathan Miller

MILLERTON — Library officials expect the NorthEast-Millerton Library to be fully open the weekend of March 14-15, a full month after a burst pipe forced librarians to move operations to the annex building on Century Boulevard.

Executive Director Rhiannon Leo-Jameson said the temporary relocation has been stressful, but library patrons have been understanding and using the library to the fullest extent possible.

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.