Spotted Lanternfly in Missouri: Is It Here? Risk & What to Do (2026)
Spotted lanternfly (Lycorma delicatula) has not been confirmed as established in Missouri — but make no mistake: Missouri is squarely in the crosshairs. State and federal entomologists have designated Missouri a Tier 1 high-risk state for establishment, meaning the conditions for a self-sustaining population are essentially already in place. The only thing missing is the insect itself arriving in sufficient numbers.
If you live in Missouri, now is the time to learn what to look for, understand why this pest is heading your way, and know exactly how to respond if you spot one.
Why Missouri Is High-Risk
Missouri doesn't have spotted lanternfly yet, but it has nearly everything else SLF needs to thrive.
Illinois is confirmed — and shares Missouri's entire eastern border. Spotted lanternfly is established in the Chicago metro and is spreading southward through Illinois. The Mississippi River corridor does not stop this insect; it hitchhikes on vehicles and goods moving across the river every day. I-70 is a major transport highway. One of the busiest freight and travel corridors in the country runs straight across Missouri from Kansas City to St. Louis — and then continues east through confirmed SLF territory in Illinois, Indiana, and Ohio. SLF spreads primarily through human movement: a single infested vehicle, a pallet of landscaping stone, or a load of firewood is enough to introduce the pest to a new location. Tree of Heaven (Ailanthus altissima) is abundant. This invasive tree — spotted lanternfly's preferred host — lines Missouri's highway shoulders, flourishes in urban lots in St. Louis and Kansas City, and grows throughout the Ozarks. Wherever Tree of Heaven grows, SLF can establish. Missouri's urban corridors offer thousands of miles of ideal habitat. Missouri's climate is compatible. SLF has demonstrated the ability to establish across a wide range of climates, from coastal Delaware to inland Tennessee. Missouri's winters are well within the tolerance range of SLF egg masses, which can survive temperatures below -10°F when properly acclimated. The state's warm summers also support rapid nymph development.What Missouri Agriculture Has at Stake
A Missouri SLF establishment would not just be an inconvenience — it would have real economic consequences for the state's farmers and rural communities.
The Hermann and Augusta wine regions. Missouri is one of America's oldest wine-producing states. The Hermann Wine Trail and the Augusta AVA (the first designated American Viticultural Area in the country) represent significant agricultural heritage and economic output. Spotted lanternfly feeds heavily on grapevines, weakening plants through phloem sap extraction and fouling fruit with sticky honeydew that promotes sooty mold. In Pennsylvania and New Jersey, vineyards in established SLF zones have reported yield losses of 20–90% without active management. Timber industry. Missouri's Ozark hardwood forests support logging, milling, and recreation economies. Black walnut — a premium timber species Missouri is famous for — is one of spotted lanternfly's preferred hosts. Established SLF populations can weaken mature black walnut trees through repeated defoliation stress over multiple seasons. Horticulture and nursery stock. Missouri's nursery industry produces trees and shrubs that are shipped across the region. An SLF establishment could subject Missouri nurseries to quarantine restrictions similar to those that have affected Pennsylvania growers — limiting where products can be shipped and adding compliance costs.How to Identify Spotted Lanternfly
Spotted lanternfly adults are about 1 inch long and unmistakable when their wings are open: gray-brown forewings with black spots, and brilliant red-and-black hindwings visible in flight. At rest with wings closed, the gray patterning provides camouflage.
Early instar nymphs (spring through early summer) are tiny, jet black with white spots. Later instars develop red patches on the body and legs. All life stages tend to cluster on plant stems, trunks, and the underside of leaves — often in groups.
Egg masses are the trickiest to spot. Laid in fall, they look like a smear of dried gray mud on a flat surface — tree bark, stone walls, outdoor furniture, patio furniture, vehicle bumpers, or any hard surface. Each mass contains 30–50 eggs and is covered with a waxy gray coating that hardens over winter.
For a full photo identification guide, see /identify.
What to Do If You See Spotted Lanternfly in Missouri
Report immediately. Missouri has not confirmed SLF establishment, which means every single sighting is a potential early detection event. Early reports give state and federal officials the best chance to respond before a population takes hold.- Missouri Department of Agriculture: Report online at agriculture.mo.gov or call 573-751-5505. Photograph the insect or egg mass if possible before disturbing it.
- USDA APHIS: You can also report sightings directly to USDA via their online portal.
- Lanternfly Watch community map: Add your sighting at /map to help track the leading edge of spread.
Stay Ahead of the Spread
Missouri's window for pre-establishment preparation is real but not unlimited. Illinois SLF populations are growing and the pest's range boundary is moving west each year. The states that fare best in managing SLF are the ones where residents are already trained to recognize it before it arrives in significant numbers.
Learn more about how SLF spreads at /spread, check your county's current risk level at /map, and see how to report to your state agency at /report-to-state.
Internal linking suggestions: Link "Tree of Heaven" to `/tree-of-heaven-identification-removal`, "how to identify" to `/identify`, "community map" to `/map`, "report to state" to `/report-to-state`, "how SLF spreads" to `/spread`.