There isn't much you can do to eliminate them, unfortunately, though you still can report them to the MDA and try some of the courses of action listed on this page: https://extension.umd.edu/resource/spotted-lanternfly-management-residents

While MDA is aware of their presence in Harford County, they still do encourage reporting of sightings. The insects should not cause significant damage to the trees, fortunately. We don't know if the chickens can/will eat them, given the opportunity...they do consume other garden pests when offered the chance, at least.

Miri