How to fight against the spotted lanternfly in Union County

Spotted lanternfly

UNION COUNTY, NJ — Union County residents who are looking for ways to help the environment are advised to be on the lookout for the spotted lanternfly, an invasive species that can destroy native trees such as the black walnut, red maple, silver maple and river birch. The spotted lanternfly is also notorious for damaging crops and ornamental flowers.

“Union County residents have worked hard to preserve open space and protect native habitat in our public parks, so we all have a stake in ensuring that the spotted lanternfly does not take hold in our area,” Freeholder Chairperson Alexander Mirabella said. “I encourage everyone to help do a service to our native ecosystems by learning how to recognize this pest and its eggs, and destroying any that you encounter.”

The adult spotted lanternfly is easily recognized by black speckles on whitish upper wings and red lower wings. The insect lays egg masses of 30 to 50 eggs over a small area of about 1 inch, typically on flat surfaces, including the outsides of vehicles. Masses laid on trees are mainly found about 10 feet above the ground.

The spotted lanternfly is an invasive species of Asian origin that was originally confirmed to be spreading in Berks County, Pa., in September 2014. However, in 2018 the plant hopper was seen in New Jersey.

Lanternflies feed on more than 70 different types of trees and plants but are particularly dangerous to New Jersey flora, such as grapevines, roses, and the river birch, silver/red maple, and black walnut trees. Because of the lethality to these particular plants, a lanternfly infestation could potentially prove damaging to New Jersey’s economy.

The New Jersey Department of Agriculture currently has eight counties under “quarantine” for the spotted lanternfly, including Burlington, Camden, Gloucester, Hunterdon, Mercer, Salem, Somerset and Warren. Union County may soon be next on that list, as residents have reported lanternfly sightings in Westfield, Springfield and elsewhere.

Residents are advised to kill any lanternflies they encounter, whether by force or by sprayed insecticide. Since the spotted lanternfly typically lays its eggs in October, residents who see egg sacs are asked to scrape them into a plastic bag full of rubbing alcohol or hand sanitizer with at least 60-percent alcohol content.

Residents are also advised to inspect their cars for lanternflies or eggs after traveling to one of the aforementioned quarantine counties, particularly if on a hiking or other nature trip, and act accordingly to prevent the lanternfly from hitchhiking back to Union County.

Spotted lanternfly sightings should be reported to the New Jersey Department of Agriculture by calling 609-406-6943 or emailing

For more information, including photos of the lanternfly and its eggs at various stages, visit here.