The spotted lanternfly (Lycorma delicatula) is a non-native invasive insect already affecting parts of the Northeast, including southern New England and New York. In August 2026, the New Hampshire Department of Agriculture, Markets, and Food confirmed the presence of spotted lanternfly (SLF) in Salem. A small number of adult insects were observed by trained experts and specimens have been confirmed by USDA identifiers. State and federal partners have initiated field surveys to determine the status of the infestation. At this time, there is no evidence of an established population in the state.
SLF has previously been intercepted in New Hampshire on nursery stock, landscaping materials, and other goods arriving from infested states. Because SLF can be easily transported on vehicles, materials, and host plants, continued public awareness and reporting are essential.
Spotted lanternfly background and risks
Spotted lanternfly feeds on plant sap from a wide range of hosts throughout its life cycle. It prefers Tree‑of‑Heaven (Ailanthus altissima), but it will feed on many other plants. Mass feeding causes plant stress and can contribute to decline in hardwood saplings, fruit trees, landscape ornamentals, and nursery stock. Grapevines are particularly vulnerable and can be killed by heavy SLF feeding.
Feeding creates large amounts of sticky honeydew, which can attract wasps and other insects and support the growth of black sooty mold. These nuisance impacts can affect homeowners, businesses, and communities as infestations increase over time. Businesses in states with established SLF populations may face additional regulatory compliance costs related to shipment of plant materials and other goods.
Resources
Best Management Practices (BMPs) for Nurseries
Additional Information on SLF
Tree of heaven is a preferred host for spotted lanternfly
Tree of Heaven is a prohibited invasive plant in New Hampshire.
Managing Tree of Heaven can reduce spotted lanternfly establishment and distribution by:
- Using it to monitor for spotted lanternfly.
- Treating with insecticides to control spotted lanternfly.
- Treating with herbicides to reduce proliferation of spotted lanternfly.
Report Tree of Heaven sightings to EDDMapS. Reports will be confirmed by the NH Dept. of Agriculture, Markets and Food.
Spotted Lanternfly Identification
Life Stages
Spotted lanternfly has several distinct life stages throughout the year. Early nymphs are black with white spots, later nymphs develop red markings, and adults have gray forewings with black spots and bright red hindwings. All life stages can be transported easily on goods and vehicles.
Identification resources, photos of all life stages, and additional SLF information are available on this page and through partner agencies.
Reporting Suspect Spotted Lanternfly
Be on the alert and report any suspected spotted lanternfly. Clear photos and detailed location information are extremely helpful.
Report SLF here:
https://www.nhbugs.org/reporting-form
Instructions for submitting specimens are provided through the reporting form. All reports are shared among UNH Cooperative Extension, NHDAMF, USDA APHIS, and other partners involved in SLF response efforts.
Tree of Heaven Identification
