Spotted Lanternfly

Spotted Lanternfly
Photo credit: PennState Extension

There is a new invasive insect in southeastern Pennsylvania, Lycorma delicatula, commonly known as the spotted lanternfly (SLF). This insect has the potential to be harmful to grapes, stone fruit, and trees. To try to limit the spread of SLF, the Pennsylvania Department of Agriculture (PDA) has established a quarantine order in municipalities where SLF already exists. All of Upper Saucon Township is in the quarantine area. All residents and businesses must comply with the regulations. The PDA has the authority to fine anyone who willfully violates the quarantine order.

If you live outside of the current (quarantine area) in Pennsylvania and find a spotted lanternfly, report it! Use this interactive Plant Pest Quarantine Search to see if you’re in the spotted lanternfly quarantine area.


The Spotted Lanternfly adult is approximately 1” long and 1/2” wide at rest. The forewing is grey with black spots and the wings tips are reticulated black blocks outlined in grey. The hind wings have contrasting patches of red and black with a white band. The legs and head are black; the abdomen is yellow with broad black bands. Immature stages are black with white spots, and develop red patches as they grow.

Signs & Symptoms:

Trees, such as tree of heaven and willow, will develop weeping wounds. These wounds will leave a greyish or black trail along the trunk. This sap will attract other insects to feed, notably wasps and ants. In late fall, adults will lay egg masses on host trees and nearby smooth surfaces like stone, outdoor furniture, vehicles, and structures. Newly laid egg masses have a grey mud-like covering which can take on a dry cracked appearance over time. Old egg masses appear as rows of 30-50 brownish seed-like deposits in 4-7 columns on the trunk, roughly an inch long

If you have questions or would like additional information  on the SLF, please use these links for information provided by PennState Extension and The Pennsylvania Department of Agriculture.

What to do if you find the Spotted Lanternfly on your property 

How You Can Comply with the Spotted Lanternfly Quarantine Regulations

Spotted Lanternfly Management Calendar

How To Eliminate or Control Spotted Lanternfly Adults

What Can Property Owners Do About The Spotted Lanternfly (video)




Upper Saucon Township hosted a Penn State Extension Workshop on the Spotted Lanternfly on February 28th. 

Master Gardener Linc Coffin discusses the Spotted Lanternfly with residents
Penn State Entomology Expert Amy Korman presents Spotted Lanternfly Information


Special Thanks to Jennifer Massaro, Amy Korman and Linc Coffin