Spotted Lanternflies in Newtown: What You Need to Know This Fall
If you’ve spent time outdoors in Newtown lately, you may have noticed a colorful but unwelcome visitor—the spotted lanternfly. This invasive insect, first discovered in Fairfield County in 2020, has now spread across the entire state of Connecticut. Unfortunately, Fairfield and New Haven counties—our home region—are among the hardest hit.
Why It Matters
Spotted lanternflies (SLF) may look harmless, but they pose a serious threat to our environment and economy. These pests target more than 70 species of plants, including:
- Fruit crops such as apples, peaches, and cherries
- Ornamental trees like maples, oaks, and birches
- Vines, including grapes and hops, are threatening local vineyards and breweries
Their feeding drains sap from plants and leaves behind a sticky substance called honeydew, which fosters black sooty mold and attracts stinging insects. Over time, this weakens trees and crops, hurting both homeowners’ yards and Connecticut’s agricultural industry.
Milkweed: An Unexpected Ally
Here’s some good news—milkweed actually kills spotted lanternflies.
Milkweed plants (such as common milkweed and swamp milkweed) produce a milky sap that contains cardiac glycosides—toxic compounds that interfere with an insect’s heart function. When lanternflies, especially young nymphs, feed on milkweed, they ingest these toxins, become sick, and often die.
That means planting milkweed in your yard can not only support monarch butterflies (whose caterpillars depend entirely on milkweed) but also serve as a natural way to help control lanternfly populations. It’s a two‑for‑one: protect pollinators and fight pests at the same time.
What We’re Seeing This Year
Sightings are up across Newtown this season, and females are now laying eggs (September–December). With adults active through November, this is a critical time to destroy pests before they overwinter.
What You Can Do
While there’s no statewide spraying program, homeowners can make a real difference:
- Squash them – Step on or kill adults and nymphs when you see them.
- Destroy egg masses – Look for gray, waxy patches on trees, fences, or outdoor items. Scrape them off, bag them with rubbing alcohol or hand sanitizer, and dispose.
- Plant milkweed – Choose native species like common or swamp milkweed. They’ll attract monarchs and poison lanternflies.
- Report sightings – Use the Connecticut Agricultural Experiment Station (CAES) reporting tool with photos and your location.
- Check your gear – Inspect cars, trailers, and outdoor items before traveling, since SLF are skilled hitchhikers.
The Bottom Line
The spotted lanternfly is a fast‑spreading invader in Newtown, but we’re not powerless. With simple actions—squashing bugs, destroying egg masses, and planting native milkweed—we can slow their spread while supporting local wildlife like monarch butterflies.
🍂 This fall, turn your yard into part of the solution: be on the lookout for lanternflies, take action if you see them, and consider adding milkweed to your garden for both pest control and pollinator support.


























































