Spotted Lanternfly Nymphs will be Hatching Soon

Spotted Lanternfly (SLF) is a new invasive insect that has spread throughout Southeastern Pennsylvania since its discovery in Berks County in 2014.
Spotted Lanternfly Nymphs will be Hatching Soon - Articles
Spotted Lanternfly Nymphs will be Hatching Soon

Spotted Lanternfly egg cases. Credit: Nancy Bosold

Spotted Lanternfly presents a significant threat to Pennsylvania agriculture, including the grape, tree-fruit, hardwood and nursery industries, which collectively are worth nearly $18 billion to the state's economy. Penn State's College of Agricultural Sciences and Penn State Extension are at the forefront of education and research aimed at stopping the spread of this exotic species.

Egg cases of Spotted Lanternfly can be found on tree bark and other smooth surfaces, like rocks, outdoor furniture, vehicles, farm equipment and other structures. They are about 1-1.5 inches long and ½ to ¾ inches wide. They are gray-brown in color.

Beginning in late April to early May Spotted Lanternfly nymphs will hatch from egg masses. Nymphs will complete four immature stages. The first stage is black with white spots and wingless (see photo). Nymphs spread from the initial site by crawling and feeding on woody and non-woody plants.

Photo: Spotted Lanternfly nymphs. Taken from Park et al. 2009.

Currently 13 counties in Southeastern Pennsylvania are under quarantine. If you are unsure if you live or farm in a quarantine area you can use this interactive map to find out. If you live outside of the current quarantine area in Pennsylvania and find a spotted lanternfly, report it!

Caption: Current Spotted Lanternfly Quarantine Area

How does the quarantine affect me?

The quarantine restricts the movement of certain articles. Industries and regulated articles under the quarantine that are not to be removed/moved to a new area are:

  • Any living stage of the Spotted Lanternfly. This includes egg masses, nymphs, and adults.
  • Brush, debris, bark, or yard waste
  • Landscaping, remodeling or construction waste
  • Logs, stumps, or any tree parts
  • Firewood of any species
  • Grapevines for decorative purposes or as nursery stock
  • Nursery stock
  • Crated materials
  • Outdoor household articles including recreational vehicles, lawn tractors and mowers, mower decks, grills, grill and furniture covers, tarps, mobile homes, tile, stone, deck boards, mobile fire pits, any associated equipment and trucks or vehicles not stored indoors.

What to do:

If you see egg masses, scrape them off, double bag them and throw them away. You can also place the eggs into alcohol or hand sanitizer to kill them. Please report all destroyed egg masses on our website.

Collect a specimen: Specimens of any life stage can be turned in to the Pennsylvania Department of Agriculture’s Entomology lab for verification. Submit samples with the Entomology Program Sample Submission Form. 

Take a picture: A photograph of any life stage (including egg masses) can be submitted to

Report a site: If you can’t take a specimen or photograph, call the Automated Invasive Species Report Line at 1-866-253-7189 and leave a message detailing your sighting and contact information.

For more information on spotted lanternfly visit the Penn State Extension websiteor Pennsylvania Department of Agriculture website.


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