09/08/2026
Spotted in Salem!
********
The spotted lanternfly, an invasive insect that can imperil certain kinds of trees and create headaches as its sticky excrement mists down onto patios and cars, has now been found in almost 150 communities in Massachusetts, about triple this time last year, officials say.
Just weeks ago, New Hampshire officials recorded what could be their first ever wild lanternfly population, spurring concerns that the pests are moving north.
Native to Asia, spotted lanternfly larvae pierce plants and the bark of trees, feeding on their sap, leaving behind a sticky residue, and inviting mold growth. They can be especially active around grapevines and maple, apple, and black walnut trees. While the adult bugs can fly, they mostly hop rapidly from place to place.
During a serious infestation, hundreds of flies can swarm tree trunks, yards, even decks, generating a mess for homeowners. Residents in other states have reported having to use umbrellas as a shield against deluges of lanternfly p**p while their backyard trees turned an apocalyptic black from the waste.
September is considered peak season for the bugs, which mature into gray winged insects about an inch long with black spots and red accents.
“Massachusetts is just now getting to the point where there is such a heavy infestation of spotted lanternfly that the general public is starting to take notice,” said Jennifer Forman Orth, an environmental biologist with the Massachusetts Department of Agricultural Resources. “They just [keep] spreading.”
Last August, state officials reported lanternflies in more than 50 cities and towns. Now, infestations have spread to almost 150 communities, where large lanternfly populations lay eggs and feed on local plants.
“Once those eggs hatch,” said Piera Siegert, a New Hampshire state entomologist, “you can reduce” the lanternfly populations, “but it would be very difficult” to eradicate them. By spring, the eggs hatch into tiny black nymphs that disperse quickly and become hard to catch.
Massachusetts hasn’t seen significant reports of tree death or long-term damage from lanternflies, but that can take years, Orth said, even with a strong infestation.
Harmless to humans and pets, lanternflies are what’s known as a nuisance pest, according to the Rhode Island Department of Environmental Management, which has logged the species in all of its counties.
But for some farmers, particularly growers of fruits, the insects represent a greater danger.
“They attack our grapes more than any other plant,” said John Galvan, a commercial small-fruit production researcher with UMass Extension.
He estimates roughly 10 percent of all orchard and berry farmers in Massachusetts may eventually be affected.
Agritourism ventures including pick-your-own orchards are especially at risk, both from lanternflies feeding on tree sap and the unpleasant swarms driving away visitors, Siegert said.
Their main host plant is tree-of-heaven, an invasive species from China.
Even if you were to cut those down, you shouldn’t be surprised to find the insects infesting your backyard maple instead, said Rolf Briggs, owner of Holliston-based Tree Specialists Inc., who has been getting two to three calls a week from homeowners about lanternfly outbreaks.
He describes patios and cars that have turned completely black under layers of sooty mold that feeds on the lanternflies’ sugary excrement.
The bugs “pass so much liquid that it comes to be like a misting of rain across your property,” Briggs said. “The layers of fungus get thicker and thicker until you can’t see the green of the leaves anymore, it’s all black.”
In Pennsylvania, where lanternflies first appeared in the US, “they had it so bad that people were using umbrellas to go from their front doors to their cars,” Briggs added. “That’s the future of what we’re going to see.”
The insects are thought to have arrived in the US as eggs inside a shipment of stone bound for Pennsylvania from Asia sometime between 2012 and 2014.
In 2019, Penn State economists estimated that unchecked growth of spotted lanternfly populations was costing their state around $324 million a year in losses to fruit growers and the forestry industry.
But seven years later, such losses haven’t fully materialized, said Timothy Kelsey, a professor in agricultural economics at Penn State. Still, lanternfly prevention efforts are costing producers and homeowners, he added, and will likely do the same in a denser state like Massachusetts.
“The out-of-pocket costs for the homeowners will exist in Massachusetts regardless of what the type of agricultural production you have,” he said.
Several states, including Pennsylvania, have imposed quarantining measures, which heap extra costs onto farmers who must now check their plant shipments to ensure they are free from claylike egg deposits or the small black bugs hiding inside, Siegert said.
In spite of those efforts, Pennsylvania still has lanternflies in more than 80 percent of its counties as of 2026, state data show.
“We already know from other states we can’t stop the spread,” Orth said, but “if you slow it down you can give people time to prepare to manage this pest.”
Lanternflies have already been spotted in every county of Connecticut as of this year, and on Aug. 25, New Hampshire officials confirmed their first field detection of spotted lanternflies in Salem.
The Massachusetts Department of Agricultural Resources has so far focused on trying to “slow the spread” to uninfested northern states, Orth said.
That means dealing with lanternfly populations in Massachusetts is mostly left up to residents.
Irene Phipps, who lives in Framingham, said it seemed like hundreds of lanternflies appeared in her neighborhood overnight recently.
“It’s upsetting,” she said, adding she had noticed them first in New York City over a year ago and heard friends complaining about lanternflies in Boston last year, before finally finding trees near her apartment covered.
Massachusetts officials have not mandated quarantining methods but have released multiple training guides on lanternfly removal and containment.
Experts previously advised people to squash the bugs on sight. Now the state’s fly management guide advises residents to use a plastic card to scrape their eggs off of trees, vacuum up live bugs with a shop vac, or employ sticky traps to catch them. Home remedies such as soap sprays are also popular, though Penn State Extension experts caution against using them as they could also harm plants.
Various insecticides, when professionally applied, are more effective, officials said. Cutting down an infested tree is unlikely to be a permanent solution, according to the guide.
Residents should also avoid parking under trees and check their vehicles before departing an infested area, Siegert said, as lanternflies are plant-hoppers that get around mostly by hitchhiking.
In 2021, Fitchburg was the first Massachusetts city to be infested with lanternflies.
But in an anomaly that has confounded researchers, surrounding towns and cities in northern Worcester County haven’t seen outbreaks, even as lanternflies have traveled to the farthest reaches of the Berkshires, the Merrimack Valley, and Bristol County.
Lanternflies now infest at least one city or town in every Massachusetts county except for those around Cape Cod and Islands, though Orth doesn’t hold out much hope that will continue.
“The host plants are there, and a lot of people will vacation to the Cape from infested areas,” she said. “We hope that people are being diligent.”
Native to Asia, the insects pose a serious risk to some trees and plants, and their sticky p**p can create a mess for residents.