Spotted lanternfly

A spotted lanternfly on a leaf

What you need to know about spotted lanternfly in Connecticut

Spotted lanternfly (SLF) is an invasive insect. It is not native to the United States and has spread across Connecticut. As of 2026, SLF has been seen in all Connecticut counties. CAES provides information to help reduce its impact and protect plants. Please see below for links to resources on identification, quarantines, and control of SLF.

To report SLF, see the link below. Please type your address in the address box to avoid errors. Pictures are required in order to verify whether the insect is a spotted lanternfly or a lookalike. You may not receive a response regarding your report.

Explore the number of SLF reports here
Submit a sighting report  

Learn more about the spotted lanternfly


Spotted lanternfly nymph on a grape leaf

Identify spotted lanternfly at each life stage

Learn what the spotted lanternfly looks like as an egg, nymph, and adult. This guide highlights key traits of each stage.
Find identification details  

Two spotted lanternflies on a vine

Report a spotted lanternfly sighting

Report where you found spotted lanternfly to help track and slow its spread across the State.

Submit a sighting report  

fourth instar spotted lanternfly nymphs

Check quarantine and movement rules

Learn where spotted lanternfly restrictions apply in CT. Find out how to move items safely and help reduce its spread.
Get quarantine guidance  

Many spotted lanternflies on a tree

Find spotted lanternfly resources

Get resources for homeowners, landscapers, and growers. Find tools and fact sheets to help manage and control spotted lanternfly and tree-of-heaven.
Explore control options  
A spotted lanternfly

How does spotted lanternfly impact Connecticut?

SLF is an invasive pest that feeds on many plants and outdoor areas across Connecticut. It does not harm people, but it can be a nuisance in yards, gardens, and agricultural areas.

Learn to recognize signs of plant damage, such as sticky residue and mold. Find photos and guidance to help you identify and respond to this pest.

Learn about spotted lanternfly impacts  


How can you spot hitchhiking spotted lanternfly?

In the fall, SLF may lay egg masses on vehicles. Adults may also cling to surfaces during travel. Before you leave an area, inspect your vehicle and belongings for insects or egg masses. Removing them helps stop the spread across the State.

Check for SLF on:

  • Cars and trailers
  • Outdoor surfaces
  • Clothing and personal items

Non-CAES Spotted Lanternfly Resources

Explore more spotted lanternfly resources from Penn State, DEEP, and the USDA.


Penn State Spotted Lanternfly Resource Landing Page 

Visit this resource for more information about the spotted lanternfly. Learn how to identify it, understand how it spreads, and get guidance on how to manage it.

Get spotted lanternfly information from DEEP 

Get information from the Department of Energy and Environmental Protection (DEEP) on the SLF in CT. You’ll find updates and helpful guidance there.

Explore federal spotted lanternfly resources 

Learn more about the spotted lanternfly using this resource. Get updates and basic facts from across the United States.