DEC is announcing that addtional efforts to limit the spread of the invasive hemlock woolly adelgid (HWA) on Forest Preserve lands in Washington County are underway. DEC forestry staff are treating 29 acres of infested hemlock stands near Shelving Rock and additional infested hemlocks near Paradise Bay. Silver flies are being used as a biological control; part of an ongoing, multi-year initiative to control the HWA infestation along the shores of Lake George that was discovered last August.