Tree problems · Insect
Spotted lanternfly: signs and what to do
Spotted lanternfly is an insect pest, often seen on tree of heaven, maples, black walnut. Look for: gray, tan egg masses with a mud-like coating on trees, stones, vehicles or outdoor items.
General information, not a diagnosis. A certified arborist or your county extension office can confirm.
- Insect
- Tree of heaven (a favorite)
- Maples
- Black walnut
- River birch
- Willows
Signs to look for
Tick what you see. More ticks make it more likely, but only an on-site look can confirm.
0 of 6 signs ticked. Ticks stay in this browser only.
Season
Eggs overwinter and hatch in spring. Nymphs feed through early summer. Adults appear in mid to late summer and lay eggs in fall.
How it spreads
Spotted lanternfly spreads mostly by hitchhiking. Egg masses and adults ride on vehicles, trailers, firewood, stone and outdoor equipment moved from infested areas.
Where it is found
Spotted lanternfly has spread across parts of the eastern and midwestern United States. Check your state official map; ranges change.
Official sources
What to do
- 1
Learn what the egg masses, nymphs and adults look like and check vehicles and equipment before leaving an infested area.
- 2
If you live outside a known area and find one, take a photo and report it to your state department of agriculture.
- 3
Follow your state rules if you live in a quarantine zone. Some require permits or inspections for businesses that move goods.
- 4
Remove or scrape egg masses as your state agency advises, and dispose of them as they instruct.
- 5
Ask your extension office before using any pesticide on a home tree.
- 6
Treat tree of heaven with care. Ask an arborist or your state agency about the best way to manage it.
Safety first: do not climb, do not cut near power lines and do not use a chainsaw on storm-loaded wood. Call the utility for downed lines and 911 if anyone is in danger.
Prevention
Check vehicles, trailers, firewood, and outdoor items for egg masses and insects before leaving an infested area. Follow any quarantine rules in your state. Control invasive tree of heaven near homes only with local advice. Healthy, well-watered trees cope better with stress.
When to call a pro
Call a certified arborist if a valuable tree has heavy infestation, sticky honeydew and sooty mold, or if you are not sure what you are seeing. Tree businesses that work in quarantine areas should check the state rules and permit requirements.
Not sure who to call? Read how to hire a tree service or check is my tree dangerous?
Trees it affects
Usually seen on: Tree of heaven (a favorite), Maples, Black walnut, River birch, Willows.
See all species in our tree library, or pick a tougher tree with the tree picker.
For tree companies
How to explain spotted lanternfly to a customer
Explain that this pest rarely kills mature trees on its own but stresses them and creates a sticky mess. Be honest that it is mostly a nuisance for many homeowners. If you work in a quarantine zone, tell customers about inspection and permit steps. Avoid scare language.
Send this page to the customer after your visit so they can read the signs in plain words. See also selling plant health care and the job photo checklist.
Questions
Does spotted lanternfly kill trees?
It feeds on sap and can stress trees, especially young or already weakened ones. Healthy mature trees often survive, but check with your extension office about your specific tree.
What should I do if I see one?
Check whether your state has asked residents to report it. If so, take a photo and report it to your state department of agriculture. Follow local instructions.
Why is tree of heaven mentioned so often?
It is a favorite food of the adult insects. Many state agencies use it to help find and manage the pest.
What is the sticky stuff under my tree?
It is honeydew, a sugary waste from the insects. Black sooty mold can grow on it. It is messy but usually does not harm the tree itself.
Do I need to check my vehicle?
In quarantine areas, yes. The insects and egg masses hitch rides on vehicles and trailers. Check your state rules before travel with goods and equipment.
Should I spray my trees?
Ask your extension office first. The right product, timing and need depend on the tree and your area. Over-spraying can harm helpful insects.
Can Lirevon diagnose spotted lanternfly on my tree?
No. Lirevon is a remote marketing team for tree service companies and does not do tree work. This page is general information, not a diagnosis. A certified arborist or your county extension office can confirm what is wrong with your tree.
How do I find a good local pro for this?
Search Google Maps for certified arborists or tree services near you, read their reviews and ask for proof of insurance. Get two or three written quotes. Our guide on how to hire a tree service lists the questions to ask.
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