A controversial herbicide was applied in Lake George over the weekend after efforts by opponents to block its use were thwarted.

The Lake George Park Commission put ProcellaCOR into the water in order to kill the invasive species milfoil. The application went well and was completed as designed, according to Executive Director Dave Wick.

“We don’t have any other applications this year, as we are waiting to make sure that all results of this project come out exactly as we had planned,” he said in an email. “The water sampling results will be available early next week, and we expect that the herbicide product will have been found to be undetectable within less than three days’ time, with 100% elimination of the invasive species within six weeks.”

There are no restrictions on drinking, swimming or fishing in the water following the application of the product.

Wick anticipates that the native plants will repopulate once the invasive is gone.

The Lake George Association, which had unsuccessfully sued to block the application, said it will be monitoring the effects of the pesticide in the two bays where they were applied. Profilers from the Jefferson Project have been operating in both Blairs Bay and Sheep Meadow Bay. The profilers are sophisticated sensors that capture water moving through the column four times a second. The data will track where ProcellaCOR traveled in the lake and its dissolution levels.