Spotted Lanternfly Has Arrived in Westchester County
Westchester County is now a confirmed spotted lanternfly infestation area. The New York State Department of Agriculture and Markets has identified active spotted lanternfly populations in Westchester, and county parks departments have been conducting active management — including physical removal operations — in affected areas.
The spotted lanternfly (Lycorma delicatula) is an invasive planthopper native to China, India, and Vietnam that was first detected in the United States in Berks County, Pennsylvania in 2014. It has since spread rapidly through the Mid-Atlantic and Northeast, establishing populations in New Jersey, New York, Connecticut, Maryland, and Delaware. Westchester County sits squarely in the zone of active spread, and populations are expected to continue growing.
Why Spotted Lanternfly Matters for Westchester Homeowners
Spotted lanternflies do not bite or sting humans, but they cause significant damage through their feeding behavior. The insects feed on plant sap using piercing-mouthparts, targeting more than 70 species of plants. Their feeding preferences include:
Tree of Heaven (Ailanthus altissima): The spotted lanternfly's preferred host plant, which happens to be abundant throughout Westchester County as an invasive species in its own right. Tree of Heaven grows aggressively along roadsides, wooded margins, and disturbed areas throughout the county.
Fruit trees: Apples, peaches, plums, cherries, and grapes are heavily impacted by spotted lanternfly feeding. Westchester County's residential orchards and gardens are at risk.
Ornamental trees: Maples, oaks, black walnuts, birches, and many ornamental landscape trees are targeted by spotted lanternfly populations when preferred hosts are exhausted.
Grapes: Spotted lanternfly feeding has devastated vineyards in affected areas of Pennsylvania and New Jersey. Hudson Valley wineries have been working proactively to protect their operations.
The insects excrete a sugary waste product called honeydew that coats plants, surfaces, and outdoor furniture. This honeydew promotes sooty mold growth that further damages plants and creates a sticky, unpleasant mess on decks, patios, and outdoor entertaining areas.
What to Look For on Your Westchester Property
Westchester homeowners should be aware of the following spotted lanternfly signs and life stages:
Egg masses (October–May): Spotted lanternflies lay flat, mud-colored egg masses on hard surfaces — tree bark, stones, patio furniture, fences, vehicles, and even the sides of houses. Each egg mass contains 30–50 eggs arranged in rows covered by a waxy coating that hardens as it ages. Fresh egg masses look like putty; older masses crack and look like dried mud. Scraping and destroying egg masses is one of the most effective individual actions Westchester homeowners can take.
Nymphs (May–July): Young spotted lanternflies are black with white spots in early stages, developing red patches as they mature through their nymphal instars. They are highly mobile and difficult to catch.
Adults (July–December): Adult spotted lanternflies are striking — gray-brown wings with black spots, bright red hindwings, and a yellow abdomen. They move in large swarms on preferred host trees and can be present in enormous numbers on a single tree at peak season.
How Spotted Lanternfly Spreads — and What Westchester Residents Must Do
Human movement is the primary driver of spotted lanternfly spread. The insects and their egg masses attach to vehicles, outdoor furniture, firewood, hiking gear, and any other items moved through infested areas. Westchester residents should:
- Inspect your vehicle — especially the undercarriage, wheel wells, and grill — before leaving areas where spotted lanternflies are present
- Never move firewood from infested areas
- Check outdoor furniture, grills, and recreational equipment for egg masses before storing or transporting them
- Scrape and destroy any egg masses you find — place them in alcohol or hand sanitizer to kill them
- Report sightings to the New York State DEC using the iMapInvasives app or online reporting tool
Professional Spotted Lanternfly Management
For Westchester properties with significant spotted lanternfly populations, professional treatment can substantially reduce the insect load on your trees and outdoor areas. Treatment approaches include targeted insecticide applications to preferred host trees, systemic trunk injections that protect individual high-value trees, and barrier treatments around property perimeters.
Early action — before populations become established and spread to additional host trees on your property — produces better results. If you are seeing spotted lanternflies on your Westchester property, contact Rest Easy Pest Control at 888-927-9842 for a professional assessment and treatment plan.