Spotted lanternflies on the trunk of a Tree of Heaven, its favorite host plant, along the Ironton Rail Trail in Berks County, Pa.

Spotted lanternflies on the trunk of a Tree of Heaven, its favorite host plant, along the Ironton Rail Trail in Berks County, Pa.

Spotted lanternflies on the trunk of a Tree of Heaven, its favorite host plant, along the Ironton Rail Trail in Berks County, Pa.

Spotted lanternflies on the trunk of a Tree of Heaven, its favorite host plant, along the Ironton Rail Trail in Berks County, Pa.