Correction: Invasive Spotted Lanternfly Egg Masses Found in Maine

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Correction: Photo descriptions and credits were excluded in the 9/29/20 distribution. They are added to each of the photos that follow this news release. Thank you.  

For Immediate Release
September 29, 2020

Contact: Jim Britt

Invasive Spotted Lanternfly Egg Masses Found in Maine
No Live Spotted Lanternflies Found 

AUGUSTA - The Maine Department of Agricultural, Conservation and Forestry (DACF) today announced finding egg masses of the invasive spotted lanternfly (SLF) on trees in Maine communities and is urging residents to report any sign of the invasive pest. The egg masses were found on trees from Pennsylvania, where SLF is established and planted in Boothbay, Freeport, Northeast Harbor, and Yarmouth.

DACF urges anyone who received goods or materials, such as plants, landscaping materials, or outdoor furniture, from a state with a known SLF infestation to carefully check the materials, including any packaging, for signs of SLF. There are currently known populations of SLF in Connecticut, Delaware, Maryland, New Jersey, New York, Pennsylvania, Virginia, and West Virginia.

If any life stages of SLF are found, residents should take a photo or collect the specimen and report any pest potential sightings to Residents should look for large, gray insects, about one inch long, with black spots and red underwings, or inch-long, rectangular yellowish-brown egg masses covered with a gray waxy coating. Egg masses may be found on any flat surface.

“These most recent finds call attention to the fact that there are many ways that spotted lanternfly can travel here from other states,” said State Horticulturist, Gary Fish. “Early detection plays an important role in the protection of our state’s economic and ecological resources from invasive species, and we ask anyone who may have received shipments of wood, ornamental plants, or any other materials from Pennsylvania or other Northeastern states to help protect the natural resources and agricultural industries of Maine by checking for and reporting any signs of spotted lanternfly.”

The spotted lanternfly (Lycorma delicatula) is an invasive sap-feeding insect from Asia first found in the United States in 2014, in Pennsylvania. While the preferred host plant of this pest is tree-of-heaven (Ailanthus altissima), spotted lanternfly attacks over 100 species of trees, shrubs, and vines, and has the potential to impact a broad range of agricultural commodities, including apples, peaches, grapes/wine, maple syrup, as well as the ornamental nursery industry.

As many families across the state spend more time at home during the COVID-19 pandemic and are undertaking activities such as gardening to improve their outdoor spaces, Maine has seen an increase in purchases of items such as outdoor furniture, play structures, gazebos, as well as trees and shrubs for landscaping. When shipped from areas with SLF infestations, these products, and the vehicles used for transportation, can unintentionally carry the pest into new areas.

Because no live SLF has been found in Maine, there is currently no evidence that SLF has become established. The DACF Horticulture Program has inspected all the suspect trees and asks the homeowners and landscape companies to keep an eye on the areas where egg masses were found to confirm that no live populations are present. Spotted lanternfly has not previously been found in Maine. 

For more information about the spotted lanternfly, please visit:

If you have seen any of the life stages of this insect in Maine, please report it:

Photo: Spotted lanternfly egg mass. (Click the image to open a print quality file.)
Credit Sarah Scally, Assistant Horticulturist, Maine DACF) 

SLF Sep 2020

A spotted lanternfly nymph (immature). Instars 1-3 are black with white spots.
(Image: Lawrence Barringer, Pennsylvania Department of Agriculture,

Early Nymph

A spotted lanternfly nymph (immature). The 4th instar has red and black patches with white spots. (Image: Lawrence Barringer, Pennsylvania Department of Agriculture, 


Spotted lanternfly adults. (Image: Sarah Scally, Assistant Horticulturist, Maine DACF) 

Adult SLF

Similar species? This fact sheet from Virginia Cooperative Extension has a link to a guide to some common look-a-like species: