Pictured: Spotted Lanternfly adults on grapes. Photo by Erica Smyers, Penn State
Spotted lanternfly is an invasive insect that has the potential to disrupt agricultural practices by feeding on plants such as walnut, grape, maple, and hops.
It is not known to be in Wisconsin yet but is established in nearby states. It is crucial to keep an eye out and report any sightings of this pest to help contain a new population before it becomes established.
With autumn now in full swing and leaves beginning to fall, it is time to be on the lookout for spotted lanternfly egg masses. In late summer, females lay their eggs in greyish, mud-like masses on various surfaces, including tree bark, stones, vehicles, and outdoor furniture, making it easy for this pest to spread to new areas.
These egg masses are usually about one inch long and coated with a waxy, putty-like substance. As time passes, the covering deteriorates, exposing 30 to 60 eggs neatly arranged in several stacked rows.
Common lookalikes include egg masses from spongy and tussock moths, lichen, and even mud. Unlike spotted lanternfly’s raised and waxy egg masses, spongy and tussock moth egg masses feel soft and squishy, while lichen and mud tend to be flat and brittle.
For more information on this pest or to report a sighting, visit slf.wi.gov.
