The spotted lanternfly (Lycorma delicatula) is an invasive planthopper that has become a serious concern across the Northeast. Originally from Asia, this pest feeds on the sap of trees and plants, causing stress, reduced growth, and in some cases, death. Since being first detected in Pennsylvania in 2014, spotted lanternflies have spread into surrounding states, including Massachusetts and Connecticut, where they threaten agriculture, landscapes, and natural habitats.

How to Identify Spotted Lanternflies

Adult spotted lanternflies are about 1 inch long and ½ inch wide with distinctive wings. Their forewings are light brown with black spots, while the hindwings are red with black spots and a white band. When at rest, they may appear gray with black speckles. Nymphs, which emerge in late spring, begin as small black insects with white spots before turning red as they mature. Egg masses resemble smears of mud or clay and are often laid on trees, vehicles, outdoor furniture, or other hard surfaces.

Why Spotted Lanternflies Are a Problem

These insects feed on more than 70 plant species, including grapevines, fruit trees, hardwoods, and ornamentals. Their feeding weakens plants and makes them vulnerable to disease and other pests. Additionally, spotted lanternflies excrete a sticky substance called honeydew, which encourages the growth of black sooty mold. This mold can damage plants further and create a mess on decks, patios, vehicles, and outdoor structures.