Spotted lanternflies also leave behind a sugary waste called honeydew. Spotted Lanternfly sits on stem seen at country garden in Sangju, South Korea, on July 17, 2026. (Photo by Seung-il Ryu/NurPhoto via Getty Images)What residents can doState officials urge residents to destroy spotted lanternflies and their egg masses when they find them. Residents can report sightings online through the state’s spotted lanternfly reporting tool or by calling 1-888-4BAD-FLY. John Fetterman and Bob Casey of Pennsylvania joined a bipartisan group in introducing the Spotted Lanternfly Research and Development Act.