Don't Spread It

TRAVELCHECKLIST

Spotted lanternfly doesn't walk to new states — travelers carry it. Egg masses on vehicles, camping gear, and firewood are how SLF jumps hundreds of miles in a single trip. This checklist takes 5 minutes and stops that from being you.

You are a vector. SLF egg masses look like dried mud and are deposited on any solid surface — your wheel wells, hitch receiver, tent poles, camp chairs. A single egg mass contains 30–50 eggs and is invisible at a glance. Check before you drive.

Why Travelers Are a Major SLF Vector

Research has repeatedly confirmed that human movement — not natural dispersal — is the primary mechanism for SLF's rapid geographic expansion across the United States.

Egg Masses Are Designed to Stick

SLF egg masses are covered with a waxy, mud-like deposit that dries hard and adheres tenaciously to virtually any surface — painted metal, rubber, plastic, fabric, bark, stone. This protective coating also makes them camouflaged and easy to mistake for actual dried mud. They are deposited in October and November and remain viable until hatching in May.

The Spread Map Follows Highways

SLF's spread from the initial Berks County, Pennsylvania detection in 2014 closely mirrors major highway corridors — I-78, I-95, I-81, I-76. The insect has appeared in new counties hundreds of miles from the established range, always near transportation infrastructure or plant nursery supply chains.

Camping Season Overlaps Egg-Laying Season

SLF adults lay eggs from late September through November — the heart of fall camping season. Campers who park under trees, stage gear on the ground, and store firewood near their site are maximally exposed to egg mass deposition and transport during the most critical period.

Vehicles Carry Eggs Thousands of Miles

Egg masses on wheel wells and undercarriages survive highway speeds and long-distance travel. A vehicle that parks in an SLF-infested campground in Pennsylvania can deposit viable egg masses in a campground in Michigan the following weekend, without the driver ever seeing a single insect.

Before You Go: Vehicle Inspection

If you are departing from or passing through an infested area, inspect these vehicle locations before hitting the road. Bring a flashlight — many of these areas are impossible to inspect by eye alone.

Undercarriage

The most commonly missed area. Crouch down and look across the underside with a flashlight. Egg masses adhere to frame members, heat shields, and any horizontal surface. After driving through vegetation or parking under trees, this is priority one.

Wheel Wells

The inside walls of wheel wells are rough and recessed — exactly the kind of surface SLF prefers for egg laying. Check all four wells. A telescoping mirror is helpful for the inner faces.

Bumpers and Trailer Hitches

The faces and recesses of front and rear bumpers accumulate insects in transit. Trailer hitches — especially the receiver tube and ball mount — are a frequent egg mass site. Pull the hitch insert and check inside the receiver tube.

Roof Racks and Cargo Carriers

Any roof-mounted rack, cargo box, or bike carrier should be checked on all surfaces — top, bottom, and mounting points. Egg masses are commonly found on the underside of roof boxes and inside the channel mounts.

Running Boards and Steps

The underside of running boards is a horizontal surface that stays relatively sheltered from wind while driving. Check the full length of any running board, step rail, or side step.

Truck Beds and Trailer Frames

If you tow a trailer or drive a pickup, check the entire trailer frame, axles, and wheel wells. Truck bed rails and the underside of tailgates are also common sites. Remove any landscaping material, mulch, or brush from the bed before traveling.

What to look for: SLF egg masses are 1–1.5 inches long, pale gray-brown to mud-colored, with a slightly shiny or varnished surface when fresh and a dull, cracked appearance when older. They are laid in rows of 30–50 eggs covered by a waxy secretion. If you find one, scrape it into rubbing alcohol or hand sanitizer immediately — do not simply brush it to the ground.

Camping Gear Inspection

Gear that spends time on the ground, leaned against trees, or stored in a shed near wooded areas is a significant SLF transport risk. Inspect before packing and again before leaving any campsite.

Tent poles

The hollow sections of aluminum and fiberglass tent poles are a prime egg mass location — dark, sheltered, and often stored near trees. Pull each section apart and check the interior with a flashlight.

Tarps and ground cloths

Check all grommet areas, the folds along edges, and any point where the tarp was in contact with the ground or a tree. SLF will lay on the underside of a tarp that was spread on the ground near infested trees.

Camp chairs and folding tables

Check under the seat webbing, inside the hollow chair legs (especially at the feet), and in the folded pivot joints of camp chairs. Folding tables — check the underside of the table surface and the joints of the folded legs.

Backpacks and stuff sacks

Check the underside of any external frame, the hipbelt seams, and buckle hardware. Stuff sacks and dry bags that were left outside near trees should be inspected on the exterior.

Kayaks, canoes, and paddle sports gear

Canoe and kayak hulls — particularly inside the cockpit and on the hull underside — are frequent egg mass sites when stored or transported through infested areas. Check paddle shafts as well.

Firewood holders and camp tools

Canvas log carriers, metal log grates, and any tools stored near a woodpile should be inspected. Anything that was in contact with wood is a potential transfer point.

Firewood: Buy It Where You Burn It

Firewood is one of the most significant vectors for SLF spread. Bark-on wood provides ideal egg-laying surface, and stacked firewood is often stored undisturbed through the entire October–November egg-laying season.

The Rule Is Simple

Purchase firewood at your destination — either from the campground itself or from a seller within 10 miles of where you will burn it. Never transport firewood from home across county or state lines. This rule applies equally to SLF and to emerald ash borer, spotted lanternfly, and oak wilt — all moved by firewood.

Leftover Firewood at Trip End

If you have firewood left at the end of your camping trip, leave it at the campsite for the next camper or donate it to the campground host. Do not load it into your vehicle to bring home. Use-it-or-lose-it is the correct approach to campfire wood.

Wood from Your Own Property

Even firewood cut from your own trees at home and stacked in your yard should not travel across county lines. If your property is in a quarantine county, your firewood is classified as a regulated article under state quarantine orders. This applies whether the wood came from an infested tree or not.

Quick-Reference: Pre-Departure Checklist

The 5-minute inspection

1
Undercarriage & wheel wells
Use flashlight. Check all four wheel wells and frame underside.
2
Bumpers, hitch & running boards
Check receiver tube interior. Inspect the underside of running boards.
3
Roof rack & cargo carriers
Check underside of any roof box. Inspect mounting channel rails.
4
Tent poles & hollow gear
Check inside hollow sections with flashlight. Check tarp grommets.
5
Camp chairs & folding tables
Check folded joints, hollow leg feet, and underside of seats.
6
Trailer frame & axles
Check entire frame, both sides of axles, and trailer wheel wells.
7
Firewood — leave it behind
Do not load leftover firewood. Leave it at the site.

Coming Home from Infested Areas

If you are returning to a non-infested area after traveling through SLF territory, your return inspection is as important as your departure check.

Inspect Before Driving Into Your Home Area

If possible, do a final inspection at a rest stop or truck stop while still in the infested zone — before crossing into a county or state without established SLF populations. Egg masses removed and destroyed in the infested area are far better than egg masses transported home.

Carry Rubbing Alcohol

Keep a small spray bottle of 70% isopropyl alcohol in your vehicle during fall travel. A direct spray on an egg mass kills the eggs on contact without needing to scrape into a separate container first. Follow up with scraping to confirm all material is removed.

Shake Out and Inspect Gear Before Storage

Before stowing camping gear in your garage, shed, or basement, shake out tarps, inspect chair joints and tent poles, and check any gear that was in contact with the ground or trees. Do not store unchecked gear from infested area trips adjacent to your own trees and landscape.

Wash Gear When Possible

Fabric items — camp towels, stuff sacks, duffel bags — can go through a standard wash cycle on hot. Tarps and tent footprints can be rinsed with a hose. A pressure wash of your vehicle undercarriage after a trip from an infested campground is a sound precaution in high-season months.

What to Do If You Find Egg Masses in Transit

Finding an egg mass during a trip is a chance to stop the spread. Here's the right response.

Do not panic or brush it off

Brushing an egg mass to the ground without destroying it can still result in viable eggs hatching wherever you are parked. Contain it.

Scrape into alcohol

Use a plastic card or putty knife to scrape the mass into a container with rubbing alcohol or hand sanitizer. This kills on contact.

Note where you found it

Record the location — campground name, parking area, rest stop — as specifically as possible. You will use this to file a report.

Report to state ag department

Report the find to the state agriculture department where you found it — not your home state. Most states have online reporting tools at their department of agriculture website.

State Border Crossing Rules for Regulated Articles

SLF quarantine orders restrict the movement of “regulated articles” — a legal term that includes live plants, nursery stock, logs with bark, and other materials that can harbor SLF. General travel is not restricted, but moving these specific items across quarantine boundaries is regulated.

Pennsylvania

Entire state under SLF quarantine. Moving regulated articles (including live plants, nursery stock, and logs with bark) out of PA into a non-quarantine state requires a permit. General travel is not restricted but voluntary inspection strongly encouraged.

New Jersey

State under SLF quarantine. Movement of regulated articles requires permit. NJDA conducts checkpoint inspections at agricultural fairs and events during peak season.

Virginia

Multiple counties under SLF quarantine order. Moving regulated articles from quarantine counties to non-quarantine areas requires a compliance agreement. VDA actively monitors compliance.

New York

Portions of the state under quarantine. Check the NYSDAM quarantine map before transporting plants or wood products from affected counties. Self-inspection programs available for businesses.

Maryland

State under quarantine. Regulated article movement requires documentation. MDA encourages voluntary vehicle inspections at all campgrounds and agricultural events.

Ohio, Indiana, Michigan

Emerging quarantine zones — check current USDA APHIS quarantine maps before traveling, as boundaries expand annually. Moving nursery stock and logs from eastern states into these areas is restricted.

Always verify current rules: SLF quarantine boundaries expand annually as new counties are added. Check the USDA APHIS SLF quarantine map and your destination state's department of agriculture website before traveling with any regulated articles. Quarantine maps are updated each year, typically in spring.

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