What Is the Spotted Lanternfly?

The spotted lanternfly is a planthopper native to China, Vietnam and India. Since first being detected in the U.S. in 2014, it has spread rapidly, feeding on more than 70 plant species. As they sap nutrients from trunks, stems and leaves, heavy infestations can weaken vines, ornamentals, trees and even agricultural crops.

Life Cycle & Instar Stages

Understanding the lanternfly’s life cycle is key to timely control:

• Egg Masses (fall–early spring): Gray-mud-like clusters laid on bark, stones, vehicles.
• First & Second Instars (spring): Tiny black nymphs with white spots.
• Third & Fourth Instars (late spring–summer): Transcript highlight: “we got another with mixed instars, third and fourths…the Reds,” referring to the red-banded fourth instars emerging among the black-and-white nymphs.
• Adults (late summer–fall): 1-inch moth-like insects with gray-wings and striking red underwings.

Identifying Mixed Instars on Ailanthus (Tree-of-Heaven)

While spotted lanternfly nymphs will group on many hosts, they show a strong preference for Ailanthus altissima. In our video, you’ll see clusters of third-instar (black with white spots) mingled with fourth-instar nymphs (red bands plus white spots). These mixed instars are often found on the main trunk and lower branches, making early detection easier.

Why They’re a Threat

• Agricultural Impact: Vineyards, orchards and nurseries risk yield losses.
• Ecological Damage: Heavy sap-feeding stresses trees, inviting secondary pests and disease.
• Nuisance Factor: Fallen honeydew leads to sooty mold, coating vehicles, decks and garden furniture.

Management Strategies

Effective control combines monitoring with mechanical, cultural and chemical tactics:

• Sticky Bands: Trap nymphs on Ailanthus trunks before they climb.
• Tree Removal: Eradicate Ailanthus altissima “tree-of-heaven” when feasible to reduce breeding sites.
• Insecticides: Apply EPA-registered systemic or contact products during peak nymph activity (late spring–summer).
• Egg Mass Scraping: In winter, scrape and destroy egg masses on bark and smooth surfaces.

Key Takeaways

• Early scouting for mixed instars on Ailanthus can halt population growth.
• Combining mechanical removal with targeted insecticide applications offers the best control.
• Community reporting—via state extension or invasive species hotlines—helps track spread.

By understanding the spotted lanternfly’s life stages—especially those striking third and fourth instars—and focusing on its favorite host, Ailanthus, you can significantly reduce infestations.