The spotted lanternfly has not yet established widespread populations in Kentucky, but the state is on high alert. Individual sightings and small detections have prompted the University of Kentucky and state agriculture officials to ask residents to report any encounters immediately. Kentucky’s abundance of hardwood forests, grape vineyards, and maple trees makes it a prime target for this invasive pest as it continues spreading westward from its original U.S. foothold in Pennsylvania.
Where Things Stand in Kentucky
Kentucky sits at the expanding edge of the spotted lanternfly’s range. The insect was first detected in the eastern United States in 2014 and has since spread to more than a dozen states, mostly along the mid-Atlantic corridor. Kentucky’s geography, with major interstate highways and shipping routes running through the state, puts it squarely in the path of continued spread. The pest hitchhikes easily on vehicles, outdoor equipment, and shipped goods, meaning a new infestation can pop up hundreds of miles from the nearest known population.
Because early detection is critical to containment, state entomologists are treating every confirmed sighting seriously. When a spotted lanternfly is discovered and the infestation appears relatively contained, officials move quickly to eradicate it through targeted insecticide treatments on host trees and removal of preferred plants, especially tree of heaven. The goal is to stamp out small populations before they become established and self-sustaining.
How to Identify Spotted Lanternflies
Spotted lanternflies look different depending on the time of year, because they pass through several distinct life stages between spring and winter. Knowing what to look for in each stage makes it far more likely you’ll catch one early.
Eggs are the hardest stage to spot. Females lay them from September through November, coating flat outdoor surfaces with masses that look like smears of dried mud. These egg masses can show up on tree bark, outdoor furniture, vehicles, stone walls, or shipping containers. They persist through the winter and into the following spring, which is exactly how the insect travels long distances undetected.
Nymphs hatch starting in May. The early-stage nymphs are small, roughly a quarter inch long, black with white spots. They remain active through July and feed aggressively on a wide range of plants. By midsummer, the older nymphs shift to a striking red-and-white spotted pattern and grow to about three-quarters of an inch. This red stage lasts from July through mid-August before the insects molt into adults.
Adults are the most recognizable. They appear starting in July and can survive through December. At rest, their folded wings are gray-tan with black spots. When they fly or feel threatened, they flash bright red hindwings with black spots and a white band. Adults are roughly an inch long and are strong jumpers, which often catches people off guard.
Common Look-Alikes
Kentucky has several native insects that get mistaken for spotted lanternflies. The spotted lantern moth, which is unrelated, has similar coloring but is noticeably smaller and behaves differently. Various species of planthoppers native to the region can also cause confusion, particularly in the nymph stages. The key distinguishing features of spotted lanternfly nymphs are the consistent white spots on a black (early) or red (late) body. If you’re unsure, take a close-up photo. Entomologists can usually confirm identification from a clear image.
Why Kentucky’s Agriculture Is at Risk
Spotted lanternflies feed by piercing plant tissue and sucking out sap, weakening and sometimes killing their hosts over time. They also excrete large amounts of a sticky substance called honeydew, which coats leaves and surfaces below feeding sites and promotes the growth of sooty mold. This mold blocks sunlight from reaching leaves, compounding the damage.
The insect’s preferred hosts read like a list of Kentucky’s most valuable plants. Grapevines rank among the most heavily targeted, and the state’s growing wine industry faces real economic exposure. Vineyards in states with established populations have reported significant vine damage and reduced harvests. Beyond grapes, spotted lanternflies threaten maple trees, walnut trees, willows, and poplars, all of which are ecologically and commercially important across the state. Hops, roses, and various ornamental nursery crops are also vulnerable, particularly to nymph feeding.
Tree of heaven, an invasive species already present throughout Kentucky, acts as a magnet for adult spotted lanternflies. It’s their single most preferred host, and areas with dense tree-of-heaven growth tend to develop the worst infestations. This creates an unusual dynamic where removing one invasive species (tree of heaven) is a frontline strategy for controlling another (spotted lanternfly).
What You Can Do on Your Property
If you have tree of heaven growing on or near your property, consider having it removed. This plant is identifiable by its compound leaves with a distinctive notch at the base of each leaflet, and it produces a strong, unpleasant smell when cut. Eliminating it reduces the likelihood that spotted lanternflies will concentrate in your area if they arrive. Your local county extension office can help with identification if you’re unsure.
Check outdoor surfaces for egg masses between September and June. They’re most commonly found on tree trunks, but also appear on stone, metal, and wood surfaces. If you find a suspected egg mass, scrape it into a bag of rubbing alcohol or hand sanitizer to destroy it. A single egg mass can contain 30 to 50 eggs, so removing even one makes a meaningful difference.
During summer months, watch for nymphs on plants in your garden, especially on grapevines, fruit trees, and ornamental shrubs. The black-and-white nymphs are active and jump readily when disturbed. If you spot them, collect a specimen if possible, or photograph it clearly.
How to Report a Sighting
Kentucky officials are explicit about the steps they want residents to take: photograph the insect, kill it, and report it. If you can collect the specimen, place it in a container and freeze it. If collection isn’t possible, a clear photo with a note of the location (an address or GPS coordinates) is the next best option.
You have several ways to submit a report. The most direct is emailing photos to ReportAPest@uky.edu. You can also submit images through the Kentucky Office of the State Entomologist’s Facebook page, or call the Office of the State Entomologist at 859-257-5838. Your local county extension agent is another resource who can assist with identification and connect you with the right officials.
Speed matters with these reports. A single spotted lanternfly sighting could indicate a nearby breeding population, and the window for successful eradication is narrow. Once populations become established and spread over a wide area, management shifts from eradication to long-term control, which is far more costly and less effective.