Tree-of-heaven
Preferred host and a high-value place to inspect. Adults often concentrate on it in fall.
Invasive insect · Massachusetts
Spotted Lanternfly in Massachusetts: What to Do If You See One
Spotted lanternfly is established in multiple Massachusetts communities. New local confirmations continued into late August and early September 2026. Adults are conspicuous in early fall, while egg laying typically begins in mid-to-late September.
Life-stage ID
Massachusetts season
Egg masses
Report & prevent spread
Adult spotted lanternfly at rest. The gray spotted forewings and dark net-like wing tips are useful adult identification features.
Spotted Lanternfly Is Established in Massachusetts
The first breeding population was confirmed in Fitchburg in 2021. By December 2025, spotted lanternfly had been recorded in more than 115 Massachusetts communities, and new local infestations continued to appear in 2026.
Spotted lanternfly (Lycorma delicatula) is an invasive planthopper that feeds on plant sap. Eggs, black-and-white early nymphs, red fourth-instar nymphs and gray-winged adults look different enough that each stage needs to be identified separately.
Location matters. Check the current Massachusetts infestation map before deciding whether a sighting is already inside a known area.
If you find a suspected spotted lanternfly in a community that is not shown on the current map, take clear photos, note the exact location and report it. In a known infestation, inspect anything that could carry adults, nymphs or egg masses off the site.
Quick answer
September in Massachusetts
- Adults are active: gray spotted forewings are usually what you see at rest.
- Red is usually hidden: the scarlet hindwings show when an adult opens its wings.
- Egg laying follows: the first new egg masses typically begin appearing in mid-to-late September.
- Movable objects matter: vehicles, trailers, furniture and equipment can carry adults or egg masses.
- Check the current map: confirm whether the town is already listed before reporting a new location.
What Does a Spotted Lanternfly Look Like?
Identify the life stage first; the same insect looks very different from spring to fall.
Egg mass
Flat, gray-beige, mud-like covering
Fresh masses are covered by a gray-beige waxy layer; older masses can crack and expose rows of seed-like eggs.
Late nymph
Red, black and white fourth instar
The final immature stage is wingless and develops vivid red patches before becoming an adult.
Adult
Gray spotted forewings at rest
Adults are roughly one inch long. The rear part of each forewing has a darker, net-like speckled pattern.
Early nymphs
From spring into summer, the younger nymphs are small, wingless, black insects with distinct white spots. Because several small black-and-white insects can look similar in a quick photo, compare the full body shape and spot pattern before reporting an uncertain find.The most common visual mistake
An adult at rest is mostly gray and black. The bright scarlet is on the hindwings underneath and becomes obvious when the insect opens its wings. A red-and-black wingless insect is the fourth-instar nymph, not a miniature adult.With the wings open, the scarlet hindwings, white band and black outer sections are easy to see.
Massachusetts Spotted Lanternfly Season
These are practical Massachusetts seasonal windows; weather can shift the exact dates.
Spring
Young nymphs
Tree-of-heaven foliage is a useful host-plant clue. Overwintered eggs hatch in spring, and early nymphs are black with white spots.
Summer
Older nymphs
By midsummer, the fourth instar is red, black and white; adults begin appearing later in summer.
Fall
Adults and egg laying
Adults feed, gather and mate. The first egg masses typically appear in mid-to-late September and continue to be laid through fall.
Winter
Egg masses
Hard freezes end adult activity, but egg masses remain outdoors through winter and hatch the following spring.
Spring
Overwintered eggs hatch; early black-and-white nymphs become the main visible stage.
Summer
Nymphs mature through the red fourth instar; adults begin appearing later in summer.
Fall
Adults are conspicuous, mating and egg laying overlap, and new egg masses begin the next generation.
Winter is not “off season”
Adults are gone after hard freezes, but egg masses remain outdoors through winter. That makes cold months useful for inspecting bark, stone, fencing, patio items, trailers and other smooth surfaces.What to Do If You Find One in Massachusetts
Photograph the insect or egg mass before you destroy, scrape or move anything.
Compare the insect or egg mass with the life stages above. Take one close photo for identification and one wider photo that shows the plant, vehicle or surface where it was found.
If the town is not shown on the current Massachusetts infestation map, report the sighting with the photo and exact location. If the town is already mapped, focus on preventing the insect or egg masses from being moved elsewhere.
Do not move a live specimen, infested firewood, nursery stock or outdoor equipment to another location for identification.
If you find a possible spotted lanternfly in a new Massachusetts community, take clear photos, record the exact location and report the sighting.
A clear close photo plus a wider location photo makes identification and reporting more useful.
1
Photograph
Get one close image and one wider image that shows the surface, plant or object where it was found.
2
Record location
Note the town and precise site. Include clear photos and the exact location when reporting a new sighting.
3
Check the current map
Established areas change. Check the current state map rather than assuming a town is or is not infested.
4
Prevent movement
Inspect vehicles and movable outdoor items before they leave a site where spotted lanternfly is present.
Where to Look Around a Massachusetts Home
Check anything that sits outdoors and can later be moved.
VehiclesDoors, sides, bumpers, wheel wells, grills and roofs before driving away.
Stone & masonryWalls, pavers, decorative stone and other hard surfaces can hold egg masses.
Outdoor furnitureChair frames, tables, umbrellas, covers and stored patio items.
Play structuresSmooth plastic, wood or metal surfaces that remain outside through fall and winter.
Trailers & RVsLong-distance movement makes these especially important to check before travel.
Firewood & equipmentInspect before moving material to another property or region.
Fences & shedsLook at flat boards, posts, siding and sheltered edges.
Host plantsCheck tree-of-heaven, grape and black walnut first; other plants can also be used.
Adults may gather on tree trunks in fall. Movable outdoor objects nearby should also be checked for insects and egg masses.
Why movable objects deserve extra attention
Spotted lanternfly can jump or fly over short distances, but movement between towns is often helped by people. Adults and nymphs can ride on vehicles and equipment, while egg masses can remain attached to hard outdoor surfaces for months. That makes an object that looks clean at first glance a possible pathway to a new location.
Egg masses are not limited to tree bark. They can be laid on stone, fencing, patio furniture, grills, trailers, recreational vehicles, sheds, firewood and other relatively flat surfaces. Items stored close to host trees deserve extra attention because adults may gather nearby during the fall egg-laying period.
The useful time to inspect is before the object is moved. Check vehicles before leaving an infested site, and look over outdoor furniture, equipment, firewood and trailers before taking them to another property, storage area or town. Removing a hitchhiking adult or an egg mass after arrival is too late to prevent the movement itself.
For vehicles, concentrate on exterior surfaces where an insect can rest unnoticed: doors and body panels, bumpers, wheel wells, the grille, roof and areas around cargo. For stored items, check sheltered edges, undersides, seams and flat faces rather than looking only at the most visible surface.
Before a fall road trip or move
If a vehicle, trailer, grill or piece of outdoor equipment has been parked under or beside infested trees, inspect it at the departure site. A quick check before movement is more useful than finding the insect after the object has reached a new location.Tree-of-Heaven and Other Host Plants
Tree-of-heaven is the preferred host, but spotted lanternfly does not live on only one plant.
Tree-of-heaven (Ailanthus altissima) is an invasive tree common in disturbed and urban sites. A single compound leaf can be 1–4 feet long, with many leaflets along a central stem. The leaflet edges are mostly smooth, with one or two glandular teeth near the base; crushed leaves and twigs have a strong unpleasant odor.
Tree-of-heaven, grape and black walnut are among the most useful host plants to inspect through the season. Nymphs may also use poison ivy and Asiatic bittersweet; adults may gather on maple and birch in fall.
Do not simply cut a suspected tree-of-heaven. Cutting can trigger vigorous stump and root sprouts. Confirm the plant first, then use an appropriate control method.
Tree-of-heaven foliage is one of the best clues for host-plant ID. Seed-bearing trees can also develop conspicuous clusters of winged samaras.
Grapevines
A high-risk agricultural host and one of the most important plants to monitor.
Black walnut
Black walnut is another preferred host worth checking.
Maple & birch
Adults may gather on these trees in fall, even though tree-of-heaven remains the classic preferred host.
Tree-of-heaven samaras form dense hanging clusters. Check the compound leaves and leaflet details as well.
Dense groups of feeding adults can produce substantial honeydew below the feeding site, supporting dark sooty mold.
What Damage Does Spotted Lanternfly Cause?
The biggest established agricultural concern is grape; many landscape impacts are nuisance and stress rather than immediate tree death.
Nymphs and adults feed on sap. Where many insects are feeding, the plant or objects underneath can become coated with honeydew, a sugary waste product. Honeydew is sticky, attracts ants, wasps and other insects, and supports the growth of dark sooty mold.
Grapevines are among the plants at greatest risk. On many other plants, heavy feeding can cause stress and nuisance problems without automatically meaning the tree is dying.
A large infestation can also become a quality-of-life problem in late summer and fall because adults may swarm and honeydew can coat yards, vehicles and surfaces below feeding sites.
Honeydew
Sticky sugary waste that can coat leaves, cars, patios and objects below feeding insects.
Sooty mold
Dark fungal growth can develop on honeydew-coated surfaces and reduce light reaching leaves.
Grape risk
Vineyards and wild grape are a major concern in regions with heavy spotted lanternfly pressure.
Does Spotted Lanternfly Bite? Is It Dangerous to Pets?
It does not bite or sting. The main problems are plant feeding, honeydew, sooty mold and nuisance swarms.
Spotted lanternflies do not bite or sting people or pets.
There is no evidence that spotted lanternflies are poisonous if eaten. Even so, keep pets from eating large numbers of wild insects and call a veterinarian if an animal has an unusual reaction.
✓
Human-contact risk: low
No stinger. Not known to bite or attack people.
Pet concern: there is no evidence that the insect is poisonous if ingested, but avoid large ingestion.
Real concern: plants, honeydew, sooty mold, nuisance swarms and spread to new areas.
Spotted Lanternfly Look-Alikes in Massachusetts
A single color or blurry photo is not enough for identification.
Use the complete pattern—not one color alone: spotted forewings, red hindwings, a broad white band and black outer sections.
Several insects can be mistaken for spotted lanternfly, especially in a blurry photo. Common look-alikes include tiger bee flies, underwing moths, tiger moths, boxelder bugs, milkweed bugs, stink bugs, fishflies and giant leopard moths.
Egg masses also have look-alikes, including spongy moth egg masses, mantis egg cases, tent caterpillar egg masses, crust fungi, lichen, tree sap and mud-dauber nests.
If the insect or egg mass does not match the full life-stage pattern, take a sharp photo and compare the complete shape, markings and life stage before reporting it.
Compare the full body shape, markings and life stage before reporting an uncertain identification.
Why September and October Matter
Adults are easy to notice in early fall, while the first overwintering egg masses begin the next generation.
September is the transition from a mostly adult problem to an adult-and-egg-mass problem. Adults are already active in Massachusetts, feeding on woody stems, gathering on preferred hosts and mating. The first egg masses may appear from mid-to-late September, so inspections that found only adults earlier in the month may begin finding eggs as fall progresses.
October broadens what homeowners should look for. Adults can remain active until a hard freeze, while new egg masses accumulate on bark and on man-made surfaces. A property can therefore show two life stages at once: visible adults on trunks and vines, and much less conspicuous gray-beige egg masses on nearby objects.
This timing also overlaps with normal fall activity around a home. Patio furniture is stored, grills are moved, firewood is stacked, trailers and recreational vehicles are relocated, and yard equipment is put away. Those ordinary movements matter because an egg mass can stay attached through winter and hatch the following spring.
Fall inspections should therefore widen beyond host plants. Check tree trunks for adults, but also scan stone, fencing, sheds, furniture, vehicles and equipment—especially objects that have been sitting near infested trees. Once a hard freeze ends adult activity, the visible insects disappear, but the egg masses remain.
In September and October, check host plants for adults, inspect outdoor objects for new egg masses and look over vehicles and equipment before they leave a known infested site.
Early fall is a key inspection period because adults are conspicuous and egg laying begins while many outdoor objects are still being moved.
Managing Spotted Lanternfly on a Property
Control depends on whether you found a few insects or a heavy infestation.
Small numbers
Small numbers of adults or nymphs can be squished or smashed, especially on vehicles or materials that are about to be moved.
Egg masses
Scrape and crush the eggs, or scrape them into rubbing alcohol or soapy water and leave them for at least 24 hours before disposal.
Large infestations
Hand removal will not control a large population. Inspect regularly, monitor host plants and choose a control method that matches the size of the infestation.
Traps
Circle traps and sticky bands can catch climbing nymphs. If sticky bands are used, cover them with a raised mesh guard so birds, bats and other animals do not become trapped.
Pesticides
Chemical treatment is mainly for heavy infestations when simpler methods are not enough. Common active ingredients include bifenthrin, beta-cyfluthrin, carbaryl, natural pyrethrins, zeta-cypermethrin, dinotefuran and imidacloprid. Some uses are restricted in Massachusetts and require a licensed applicator. Use any pesticide only where its label allows it, and avoid treating blooming plants when pollinators are active.
Tree-of-heaven
Do not simply cut it down. Tree-of-heaven can respond with vigorous root sprouts; plant control should follow a proper management plan.
For a heavy infestation, choose treatment based on the plant, site, season and current product label.
Where Is Spotted Lanternfly in Massachusetts?
The current Massachusetts infestation map shows whether a town is already in a known infestation.
The Massachusetts infestation map was still changing in 2026
Mendon announced a confirmed infestation on August 25, 2026; Sharon and Sherborn announced local detections on September 1; Clinton announced a confirmed infestation on September 3. Those recent findings show why the live state map is more useful than a fixed town list.
Use the Massachusetts Spotted Lanternfly page below to check the current infestation map.
Massachusetts history
First established population: 2021
The first established breeding population in Massachusetts was detected in Fitchburg, Worcester County, in 2021. Additional populations have been found since then.
By late 2025, spotted lanternfly had been found in more than 115 Massachusetts communities. The distribution continued to change in 2026.
Check the map before reporting: sightings from communities not already shown are especially important for early detection.
Questions About Spotted Lanternfly in Massachusetts
Identification, season, reporting and control.
What should I do if I see a spotted lanternfly in Massachusetts?
If the sighting is outside a known infested area—or you are not sure—take clear photos, note the exact location and report it. In a known infested area, take steps to avoid moving insects or egg masses to another location.
Does a spotted lanternfly bite or sting people?
No. Spotted lanternflies do not bite or sting people or pets. The main concerns are plant feeding, honeydew, sooty mold, nuisance swarms and accidental spread.
Are spotted lanternflies poisonous to dogs or cats?
There is no evidence that spotted lanternflies are poisonous if eaten. Pets should still be prevented from consuming large numbers of any wild insect, and a veterinarian should be contacted if there is a specific concern.
What does a spotted lanternfly egg mass look like?
A fresh mass is flat and about an inch long, with rows of tiny eggs under a gray or beige waxy coating. As it weathers, the covering can look like dried or cracked mud. Older masses may expose rows of brown, seed-like eggs.
When are spotted lanternfly egg masses present in Massachusetts?
Egg masses can be present from September through June. Eggs overwinter and hatch in spring; weather shifts the exact timing.
When are adult spotted lanternflies active in Massachusetts?
Adults can be present from August through December. Adults disappear after a hard freeze; the egg masses survive winter.
Where should I look for spotted lanternfly around a home?
Check host trees and vines, but also smooth outdoor surfaces such as vehicles, trailers, stone, fencing, patio furniture, play structures, grills, firewood and equipment. Egg masses on movable objects are especially important because they can spread the insect.
What plants should I check first?
Tree-of-heaven, grape and black walnut are among the most useful host plants to inspect through the season. Nymphs may also use poison ivy and Asiatic bittersweet, while adults may gather on maple and birch in fall.
Should I kill spotted lanternflies I find?
Small numbers of adults or nymphs—especially on vehicles or materials being moved out of an infested area—can be squished or smashed. Hand removal is not an effective way to control a large infestation.
How do I destroy spotted lanternfly egg masses?
Scrape egg masses off the surface and crush the eggs as you scrape, or scrape them into a container with rubbing alcohol or soapy water and leave them for at least 24 hours before disposal.
Should I spray pesticides for spotted lanternfly?
Not as a default response. Chemical treatment is mainly for heavy infestations when simpler control methods are not enough. Some tree and shrub insecticides are restricted-use in Massachusetts, so check the current product label and use a licensed pesticide applicator where required.
Where are spotted lanternflies in Massachusetts right now?
Check the current Massachusetts infestation map. Spotted lanternfly had been found in more than 115 communities by late 2025, and new local infestations were still being confirmed in September 2026.