LGA Closely Monitoring ProcellaCOR Before, During, and After Its June 29 Application

June 29, 2024

LAKE GEORGE — The Lake George Association (LGA) is closely monitoring the behavior and effects of the ProcellaCOR pesticide that the Lake George Park Commission (LGPC) had applied to two Lake George bays early this morning.

Vertical profilers from The Jefferson Project have been operating in both Blairs Bay and Sheep Meadow Bay since early this week. The profilers are highly sophisticated sensors that, among other things, capture water movement throughout the water column four times a second. In addition, Jefferson Project scientists have and continue to collect water samples. 

In the short term, the data will reveal where ProcellaCOR traveled in the Lake and its dissolution levels. Those findings are expected in a few weeks. Efficacy of the pesticide and potential unwanted damage to other species will be measurable after several months of surveying by The Jefferson Project.

vertical profiler in sheep meadow bay, lake george

Verticl profiler (lower front right) from The Jefferson Project and resident boats in Sheep Meadow Bay on June 28, 2024.

ProcellaCOR going into Blairs Bay, Lake George

The ProcellaCOR pesticide treatment in Blairs Bay on June 29, 2024.

“It is very unfortunate that ProcellaCOR was put in Lake George at all, particularly when The Jefferson Project’s computer models were available to predict the flow of pesticide without putting it in the water. But now that it has been applied, we must take the opportunity to scientifically measure the effects for better-informed lake management decisions,” said Dr. John Kelly III, LGA Board Chair.

The research is intended to answer questions such as:
• Was ProcellaCOR effective in water that is not still and quiescent (as the label requires)
• Did ProcellaCOR kill plants other than Eurasian watermilfoil?
• Did ProcellaCOR, a highly concentrated synthetic growth hormone, become diluted enough that it actually promoted growth of milfoil rather than eliminate it?
• Did degradants of the chemical remain in the Lake longer than claimed by the manufacturer?

Despite widespread objection to this experiment in chemical management of Eurasian watermilfoil by the four towns adjacent to the treatment sites, riparian owners, and 5,000-plus residents and visitors, the state put the pesticide in the water less than 24 hours after Supreme Court Justice Robert Muller lifted a temporary restraining order. People who live along the two bays received no official notice about the timing of the treatment. Still, property owners gathered on docks and in boats to witness the first-ever intentional application of chemicals to Lake George. 

“With all the negative information about ProcellaCOR that the judge ignored, I’m disgusted they put it in the Lake this morning,” said Paul Ferguson, Supervisor for the Town of Dresden, which passed a resolution opposing ProcellaCOR in February 2023. “The Park Commissioners are not looking out for the best interest of the Lake now or for the future.”  

The Lake George Association is committed to supporting the safest, most effective, most environmentally responsible management of Eurasian watermilfoil and other invasive species in Lake George. In May, the LGA offered to pay for the hand harvesting of milfoil in the two test bays this summer and collaborate on a comprehensive lake management plan; the LGPC rejected the offer. 

In addition to its extensive and comprehensive data collection, the LGA is evaluating future legal options.