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Spotted Lanternfly
The Spotted Lanternfly (Lycorma delicatula) is a beautiful but highly destructive invasive planthopper from Asia. Since its discovery in Pennsylvania in 2014, it has spread to nearly 20 states. As of 2026, researchers are finding that these insects are even adapting to urban "heat islands," making them a persistent threat to agriculture and local ecosystems.
Note: When the adult's wings open (usually only when startled or flying), you’ll see bright red hindwings.
Pro Tip 💡
Behavioral Note: They often fall to the ground when disturbed, but will climb back up; try to approach them from the front to catch them, as they tend to jump forward.
🔍 Identification by Life Stage
The lanternfly looks drastically different depending on the time of year. Use the table below to identify them:
Egg Masses - Gray, putty-like smears (looks like cracked mud) from Sept – May
Early Nymph - Tiny (1/4"), black with bright white spots from May – July
Late Nymph -Larger (3/4"), vibrant red with black/white spots from July – Sept
Adult - 1" long, pinkish-tan wings with black spots from July – Dec
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🚫 Why They Are a Problem
- Plant Stress: They use piercing mouthparts to suck sap from over 70 species of plants, including grapes, hops, maples, and fruit trees.
- "Honeydew" & Mold: They excrete a sticky, sugary liquid called honeydew. This attracts wasps and causes black sooty mold to grow, which can kill plants and ruin outdoor furniture.
- Hitchhikers: They are world-class travelers, often laying eggs on cars, trailers, and shipping pallets, allowing them to spread hundreds of miles in a single trip.
🔨 What You Should Do
If you see one, the general consensus from environmental agencies is clear: "See it, Squish it, Report it."
- Kill on Sight: Squash nymphs and adults. For egg masses, scrape them into a bag with rubbing alcohol or hand sanitizer to kill them.
- Report the Sighting: If you are in a new area (not yet heavily infested), take a photo and report it to your state’s Department of Agriculture.