Spotted Lanternfly (4th instar nymph)

Natural Habitat

Originally from Asia, introduced to the US. Found in forests, agricultural areas (vineyards, orchards), and suburban/urban environments, particularly where their preferred host plants are abundant. They often lay eggs on smooth surfaces like trees, rocks, and even outdoor furniture or vehicles.

Diet & Feeding

Plant sap from a wide range of host plants, including trees, vines, and crops. Known hosts include Tree of Heaven, maples, walnuts, birches, grapes, hops, and fruit trees.

Behavior Patterns

Spotted Lanternflies undergo incomplete metamorphosis, having three nymphal instars before reaching adulthood. The nymph in the image is a 4th instar nymph. They feed by piercing plant tissues with their mouthparts and sucking out sap. They are known to excrete a sugary substance called honeydew, which can promote the growth of sooty mold on plants and surfaces. They are strong jumpers.

Risks & Benefits

Potential Risks: Significant invasive agricultural and forest pest. Causes direct damage to plants by sap feeding, leading to stunted growth, reduced yields, and sometimes plant death. Honeydew excretion promotes sooty mold growth, which inhibits photosynthesis and reduces plant aesthetics. Can be a nuisance in residential areas due to their numbers and honeydew production. Potential Benefits: No known direct benefits to the ecosystem in invaded regions; they are considered a purely damaging invasive species.

Identified on: 8/10/2025