WARRENSBURG — The state Department of Environmental Conservation and Cornell Cooperative Extension will host a workshop on the invasive hemlock woolly adelgid here Saturday, Dec. 15.

Charlotte Malmborg, a natural resources technician with the New York State Hemlock Initiative at Cornell University, will talk about the adelgid and the dangers of the invasive insect to the state’s forests. Part of the workshop will be outside so participants can look at hemlock trees.

DEC staff will also give some information on the spotted lanternfly, an invasive species that was found in New York for the first time last year.

The hemlock woolly adelgid was first discovered in New York in 1985, but the first infestation in the Adirondacks was discovered last year near Lake George. A survey found three trees infested with the small insect, and the Adirondack Park Invasive Plant Program treated each of the trees.

The workshop will begin at 12:30 p.m. at the DEC Warrensburg office at 232 Golf Course Road, Warrensburg.

The workshop is free and open to the public, but preregistration is required. To register, contact Dan Carusone at 518-668-4881 or email at djc69@cornell.edu. The workshop will be limited to 75 people.