Spotted Lanternfly Identification Guide
The spotted lanternfly (Lycorma delicatula) is an invasive species from Asia first detected in Pennsylvania in 2014. It's now widespread throughout Philadelphia and is a major agricultural and ornamental plant pest. Pennsylvania law requires residents to report and destroy spotted lanternflies. It is NOT harmful to humans but damages grapevines, fruit trees, and hardwood trees.
High concern
| Quick ID Reference |
|---|
| Size | 1 inch long, 2-inch wingspan |
| Color | Gray spotted forewings, red/black/white hindwings |
| Eggs | Rows of gray putty-like egg masses, November–June |
| Nymph | Black with white dots (early), red with white dots (late) |
| Host Plants | Tree of heaven, grapevine, apple, maple |
| Season | Nymphs May–July, adults July–December |
Frequently Asked Questions
Is spotted lanternfly dangerous to humans?
No — spotted lanternflies do not bite or sting. They are dangerous to plants, not people. However, Pennsylvania law requires you to kill them if found and report large infestations.
What does spotted lanternfly damage look like?
Plants weep sap ('bleeding'), develop black sooty mold from the sugary honeydew the insects excrete, and may show wilting or dieback. Grapes, apples, hops, and maple trees are most affected.
How do I report spotted lanternfly in Philadelphia?
Report sightings to the PA Department of Agriculture at 1-888-4BADFLY or online at agriculture.pa.gov. Kill any you find by stomping, swatting, or placing in a sealed bag.
When should I call a pest control professional?
If you're seeing large numbers, finding entry points you can't seal, or if the infestation is affecting your quality of life, City Best Pest Control offers free inspections for Philadelphia, Montgomery County, Delaware County, and Bucks County residents. Contact us here.
