Tree problems · Insect
Lace bugs: signs and what to do
Lace bugs is an insect pest, often seen on sycamore and planetree, hackberry, oaks. Look for: pale, stippled spots on the top of the leaf.
General information, not a diagnosis. A certified arborist or your county extension office can confirm.
- Insect
- Sycamore and planetree
- Hackberry
- Oaks
- Linden
- Many shrubs such as azalea and hawthorn
Signs to look for
Tick what you see. More ticks make it more likely, but only an on-site look can confirm.
0 of 5 signs ticked. Ticks stay in this browser only.
Season
Some species overwinter as eggs in leaf tissue. Others overwinter as adults in bark cracks, mulch or grass tufts. Several generations occur in a growing season, with each cycle taking roughly four to seven weeks in one extension source.
How it spreads
Adults fly or crawl from plant to plant. Numbers can build up over the season, and damage is usually easiest to see in summer.
Where it is found
Lace bugs of different kinds live across the United States. Check your state official map and your county extension office for the species near you; ranges change.
Official sources
What to do
- 1
Turn leaves over and look for the insects, shed skins and dark droplets.
- 2
Take photos of both sides of the leaf.
- 3
For light infestations, a strong stream of water can wash the insects off, as extension sources suggest.
- 4
Ask your extension office about insecticidal soap or horticultural oil, which can work with repeat applications.
- 5
Ask about natural enemies. Some predators and tiny wasps feed on lace bugs, and harsh sprays can harm them.
- 6
If an insecticide is used, follow the label and apply it to the first generation, as extension guidance advises.
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
Scout susceptible plants in early spring and then about every two weeks in the growing season. Keep trees watered in dry spells and avoid stress. Ask your extension office whether raking up leaf litter where adults hide makes sense for your plants.
When to call a pro
Call a certified arborist if a large tree is heavily affected for several years, if you are not sure what is causing the pale leaves, or before treating a tall tree. Spraying large trees takes the right equipment and licensing.
Not sure who to call? Read how to hire a tree service or check is my tree dangerous?
Trees it affects
Usually seen on: Sycamore and planetree, Hackberry, Oaks, Linden, Many shrubs such as azalea and hawthorn.
See all species in our tree library, or pick a tougher tree with the tree picker.
For tree companies
How to explain lace bugs to a customer
Be honest that lace bug damage is often more about looks than tree health, though sources differ and repeated heavy feeding on a stressed plant can add up. Check the underside of leaves with the owner so they can see it for themselves. Avoid upselling sprays the tree does not need.
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
What are lace bugs?
They are small, flat insects with lace-like wings. They feed on the underside of leaves and leave pale spots on the top.
How do I know it is lace bugs?
Look on the underside of leaves for tiny insects, dark droplets and shed skins. The top of the leaf will show pale stippling.
Do lace bugs kill trees?
Sources differ. Some say the damage is mostly cosmetic. Others say repeated heavy infestations can seriously weaken plants. Ask your extension office about your tree.
Can I just wash them off?
For light infestations, a strong stream of water can help. It is a simple first step.
When should I treat?
Extension guidance suggests scouting early and timing any treatment to the first generation. Follow the product label.
Will they come back?
They often do, because several generations occur each season and adults can overwinter close by. Regular checks help you catch them early.
Can Lirevon diagnose lace bugs 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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