Until this announcement, Agrilus planipennis, emerald ash borer, or EAB for short, had been found throughout New York state, but the locations closest to NYC were in Westchester County. This is quite a leap. One of the ways invasive forest pests get spread is through moving firewood. I wonder if that was the case here.
I live 1/2 mile south of Prospect Park. I am going to visit the ash trees in my neighborhood. They may not be here next year.
Press release from Prospect Park Alliance, 2017-10-27:
Today, the New York State Departments of Agriculture and Markets (DAM) and Environmental Conservation (DEC) confirmed the first-ever discovery of Emerald Ash Borer (EAB) in New York City in Prospect Park. Of an initial survey of 10 suspected trees in Prospect Park by Prospect Park Alliance—the non-profit that cares for the Park in partnership with the City, three were confirmed to be infested by this invasive pest by a Cornell University researcher.