Some insects are harmless visitors that can be gently moved outdoors. Others can threaten crops, trees, gardens, and local ecosystems if they are allowed to spread.
The spotted lanternfly belongs to the second group.
With its spotted wings, red underwings, and unusual appearance, this insect may look striking. However, in regions where it is considered invasive, it can feed on many plants, weaken trees and vines, and spread quickly by attaching its eggs to vehicles, firewood, outdoor furniture, and other surfaces.
Finding one does not mean your entire property is infested. It does mean that the insect should be identified carefully, reported when required by local authorities, and controlled using safe methods appropriate for your area.
What Is the Spotted Lanternfly?
The spotted lanternfly is a planthopper originally native to parts of Asia.
In areas where it has been introduced, it can become an invasive agricultural and environmental pest because it feeds on the sap of many plants.
Plants commonly associated with spotted lanternfly activity may include:
- Grapevines
- Fruit trees
- Maples
- Walnut trees
- Willows
- Stone-fruit trees
- Tree of heaven
Tree of heaven is one of its favored host plants, but the insect may move between many different plants during its life cycle.
How to Recognize an Adult Spotted Lanternfly
Adult spotted lanternflies are approximately one inch long when resting.
Their closed front wings are grayish or light brown with dark spots.
When the wings open, bright red coloring may be visible underneath, along with black and white markings.
Adults may jump suddenly when approached, which can make them difficult to catch.
How to Recognize the Nymphs
Young spotted lanternflies are called nymphs.
Early-stage nymphs are generally small and black with white spots.
Later-stage nymphs develop red coloring while retaining black and white markings.
Nymphs do not yet have fully developed wings, but they can jump and climb quickly along tree trunks, stems, fences, and outdoor structures.
How to Recognize the Egg Masses
Spotted lanternflies lay clusters of eggs on many hard surfaces.
Fresh egg masses may appear as rows of seed-like eggs covered with a gray, waxy coating.
As the coating dries, it may resemble:
- Dried mud
- Gray putty
- A smear of clay
- A rough patch of cement
Egg masses may be found on:
- Tree bark
- Firewood
- Rocks
- Vehicles
- Trailers
- Outdoor furniture
- Fences
- Garden equipment
- Metal or plastic surfaces
This ability to lay eggs on movable objects is one reason the insect can spread into new regions.
Why the Spotted Lanternfly Is a Concern
Spotted lanternflies use piercing mouthparts to feed on plant sap.
A large number of insects feeding together can stress plants and reduce their overall vigor.
They also excrete a sugary substance known as honeydew.
Honeydew can coat leaves, patios, furniture, vehicles, and other objects beneath infested trees.
The sticky material may support the growth of dark sooty mold, which can interfere with photosynthesis and create an unpleasant mess around the property.
Does One Insect Mean a Serious Infestation?
Not necessarily.
A single insect may have arrived on a vehicle, plant, shipment, or outdoor item.
However, finding one should prompt a careful inspection because eggs, nymphs, or additional adults may be nearby.
The adult insect is easy to notice, but the less obvious egg masses hidden on bark, equipment, and firewood may be the most important places to check.
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