Spotted Lanternfly Nymphs Emerge in Doylestown

Doylestown residents should watch for Spotted Lanternflies this month as nymphs become active across the region. The invasive pest feeds on sap from over 70 plant species, including grapes, apples, hops, walnuts, and hardwood trees that dominate local agriculture and forestry.

Newly hatched nymphs are black with white spots. Older nymphs develop red, black, and white markings. Adults, which appear from July through December, measure about 1 inch long with grey forewings, red hindwings with black spots, and yellow abdomens with black bands.

The lanternflies secrete honeydew, a sugary substance that attracts bees and wasps while promoting sooty mold growth. This mold damages plants and fouls outdoor surfaces.

Residents should inspect vehicles, outdoor furniture, and other items before traveling to prevent spreading the pest. Anyone finding a Spotted Lanternfly should destroy it and report the sighting to the state Department of Agriculture or a local extension office.

Removing Tree of Heaven from properties can help control local populations, as the pest prefers this host plant. Without intervention, the infestation could threaten Pennsylvania's timber, grape, orchard, and tourism industries.