Spotted Lanternfly Control in Media and Delaware County, PA

What Do Lanternfly Eggs, Nymphs and Adults Look Like?

Each life stage looks different, which is why many homeowners miss the early signs. Watch for:

• Egg masses (fall to spring): flat, gray, putty-like smears about an inch or two long on bark, stone, fences, outdoor furniture and vehicles. Older masses look cracked, like dried mud.
• Early nymphs (May to July): small, black, wingless insects with white spots that jump when disturbed.
• Late nymphs (July): larger and bright red with black and white markings.
• Adults (July until a hard freeze): about an inch long, with gray, black-spotted forewings that flash red hindwings in flight.
• Honeydew and sooty mold: a sticky film on decks, cars and plants beneath infested trees, often turning black with mold and drawing bees, wasps and ants.
• Weeping sap: dark, wet streaks on trunks where lanternflies are feeding in large numbers.

What the PDA Quarantine Means for Delaware County Homes

The Pennsylvania Department of Agriculture's spotted lanternfly quarantine covers the southeastern counties, including Delaware, Chester, Montgomery, Bucks and Philadelphia. Inside the zone, the state asks residents to check vehicles, firewood, outdoor furniture and other items for egg masses and hitchhiking insects before moving them.

The permit side applies to businesses rather than households: companies that move vehicles or goods within or out of the zone need a PDA spotted lanternfly permit, earned by completing PDA's training. Treatment itself is a pesticide application, so the Pesticide Control Act of 1973 applies, and any provider should be able to give you its PDA business license number.

Businesses that move goods or vehicles in and out of the quarantine should check PDA's permit requirements directly. This is general information, not legal advice.

Tree of Heaven and Other Local Host Plants

The lanternfly's favorite host is tree of heaven, an invasive tree that grows fast along rail lines, highway shoulders, vacant lots and the industrial riverfront between Chester and Marcus Hook. Where tree of heaven grows near homes, lanternfly numbers tend to be heavy.

They also feed on red and silver maples, black walnut, willows, birch and grapevines, all common in Delaware County yards. Healthy shade trees usually survive the feeding, but repeated heavy infestations stress them, and grapevines and young trees can suffer real damage.

Why Some Delaware County Yards See Lanternfly Swarms

Spotted lanternflies were first found in the U.S. in Berks County, Pennsylvania, in 2014, and they spread mostly by hitching rides. Egg masses laid on vehicles, rail cars, trailers and stacked materials travel far faster than the insects can fly. Delaware County sits on some of the region's busiest routes, including I-95, I-476 and the rail lines through Media, Wawa and the riverfront, so new adults arrive every summer even in yards that were cleared the year before.

Yard layout decides how bad it gets. Homes that back onto a rail embankment, a highway sound wall or an overgrown vacant lot usually have tree of heaven within flying distance, and adults move from there onto maples, walnuts and grapevines. Decks and patios under those trees collect honeydew first, which is often the earliest sign people notice in August, soon followed by adults lining up along the trunks of host trees.

How We Inspect Trees and Outdoor Surfaces

The free inspection covers trunks and limbs we can see from the ground, the undersides of branches, fences, stone walls, sheds, play sets, firewood and anything stored outside. We identify host trees, look for tree of heaven on or near the property and count egg masses or active insects to judge pressure.

We also note which trees are flowering or about to flower, because any insecticide work on those trees has to wait until bloom is over to protect pollinators. The written quote lays out what to treat, when, and what you can safely handle on your own.

Spotted Lanternfly Treatment Options, With Trade-Offs

No single method clears a yard, because adults keep flying in from untreated trees nearby. A combination is usually the practical answer.

• Egg mass scraping: removes the next generation before it hatches. Simple and effective, but limited to masses you can reach.
• Circle traps: funnel-style traps wrapped around the trunk catch nymphs as they climb. Unlike sticky bands, they do not trap birds or small mammals.
• Contact sprays: knock down nymphs and adults on lower limbs, walls and fences. Results are immediate but short-lived, and blooming plants are skipped.
• Systemic tree treatment: an insecticide applied to the bark or soil that the tree takes up, killing lanternflies as they feed. Longer lasting, but reserved for key host trees after bloom.
• Tree of heaven removal: cuts off the preferred food source. Cut trees resprout aggressively, so removal is usually paired with a stump treatment.

Your Lanternfly Visit, Step by Step

1. 1

   Book an inspection

   Tell us where you are seeing egg masses, nymphs, adults or honeydew.

2. 2

   Tree and surface survey

   We identify host trees, tree of heaven and egg masses, and note what is in bloom.

3. 3

   Written quote

   You receive a quote that matches each method to the season and the tree.

4. 4

   Egg and trap work

   Reachable egg masses are scraped and destroyed, and circle traps go on key trunks in spring.

5. 5

   Targeted treatment

   Contact or systemic applications are made to selected host trees once bloom is over.

6. 6

   Follow-up

   We check traps and trees later in the season and plan the next round of egg scraping for fall.

A Season-by-Season Lanternfly Calendar

From October through April, egg masses are the target, so scraping and destroying them is the most useful work. Nymphs hatch from roughly late April into June, which is the window for circle traps and early contact treatments.

By July, adults appear and gather on host trees through September and October, laying eggs until a hard freeze. Systemic treatments are timed for this summer feeding period on selected trees, and fall is the time to inspect everything stored outdoors before moving it.

What Affects the Cost of Lanternfly Treatment?

The written quote after inspection depends on:

Tree size is the biggest single factor. A pair of young red maples in a Brookhaven yard can be handled from the ground, while a mature black walnut or silver maple on a large Chadds Ford lot takes more product for a systemic treatment and has more egg masses out of reach.

Surroundings matter too. A property next to a rail embankment or an untreated lot full of tree of heaven keeps receiving adults all summer, so a multi-season plan is often more realistic there than a single visit.

• Number and size of host trees to treat
• Egg mass counts and how high they sit
• Traps, contact sprays, systemic work or a mix
• Tree of heaven on or next to the property
• One visit or a multi-season plan
• Pairing the visit with a mosquito yard treatment program or tick control along the wood line