Spotted lanternfly infestation confirmed in Watertown

State agricultural officials have confirmed an infestation of the invasive spotted lanternfly in Watertown, marking the latest detection of the destructive insect in Massachusetts. The infestation was reported less than three miles from the border with Waltham.

The Massachusetts Department of Agricultural Resources said a survey team verified the presence of the pest after responding to a report from Mount Auburn Cemetery. Officials said only a preliminary assessment has been conducted so far, and the full extent of the infestation remains unclear.

The spotted lanternfly, native to Asia, feeds on tree-of-heaven, grapes, hops, maples and other plants. It poses a threat to vineyards and other agricultural industries and can become a nuisance in heavily infested areas. Although the bugs do not bite or sting, they swarm in large numbers and leave behind a sticky residue called honeydew that can coat outdoor surfaces.

The insects are most noticeable in late summer and fall, when adults gather in clusters on trees, structures and other objects. Agriculture officials are urging residents to report potential sightings to help prevent the spread.

More information, including management guidance for homeowners, is available through the state agriculture department.