Spotted Lanternfly

Picture of the life cycle of the Spotted Lanternfly.

The Spotted Lanternfly (SLF) is a destructive invasive pest, that does not bite or sting but is threatening agricultural, timber, and ornamental industries, and the plants in your backyard. Together, we can take action to limit the spread and damage from this pest.

Spring Egg Hatch 2020

An early spring means warmth, flowers, and eminent hatching of thousands of SLF egg masses.  Most likely the hatch will begin in southern Pennsylvania in mid- to late-April and lag by a week or so in more northern counties.  The majority of SLF hatch (more than 50%) will likely be in mid to late May.

Visit the Penn State Extension website for more information on the spring hatch and what you can do to stop the spread of this invasive pest.

Tips for Homeowners

Helpful tips for homeowners to limit the spread and damage of the SLF include:

  • If you find a spotted lanternfly outside the quar­antine zone, collect and report it immediately with the online reporting system at or by calling 1-888-4BAD-FLY. SLF found within the quarantine zone do not need to be reported.
  • Don’t let SLF spread. Check your car, outdoor equipment, etc., for SLF eggs, nymphs, and adults when moving in and out of the quarantine zone. Don’t move firewood.
  • Help reduce SLF populations by scraping egg masses from trees, houses, and anywhere else you find them. Destroy mobile stages of SLF by crushing them.
  • Band trees to trap and kill nymphs in the early spring.
  • Remove tree-of-heaven, the preferred host for SLF.
  • If needed, protect your trees by applying insecticides using foliar or soil drench methods or consult a local tree care service. Always follow label instructions when apply­ing any pesticide.

Additional Tips

Not sure what to look for or seek additional tips click on one of the links below or visit the Pennsylvania Department of Agriculture website and the Penn State Extension website