Leaf-Footed Bug: How to Identify It, What It Damages, and How to Get Rid of It

What is a leaf-footed bug?

A leaf-footed bug is a plant-feeding true bug in the family Coreidae. Its name comes from the flattened, leaf-like flare on the shin of each back leg. Most are brown, narrow and 1/2 to 3/4 inch (13 to 19 mm) long, and the Missouri Department of Conservation counts nearly 90 species in North America north of Mexico.

The one most gardeners meet is in the genus Leptoglossus. Like all true bugs, it has a long beak that works like a straw. It pushes the beak into fruit, seeds and stems and sucks out the juice. It goes from egg to nymph to adult with no grub or pupa stage, so the young look like small, wingless adults.

You will see the name written three ways: leaf-footed bug, leaf footed bug, and leaffooted bug, which is the spelling the University of California uses. They all mean the same insect. People also call it a “leaf legged bug”, or a “leaf-footed stink bug”, although it is not a stink bug.

Types of leaf-footed bugs and which one you have

Where you live narrows it down. In the South and East, a 3/4 inch bug with a straight white bar is almost always the eastern leaf-footed bug. In California and along the Gulf, it is usually the western leaffooted bug, with two yellow spots behind the head. A 1 inch bug on a northern window in fall is the western conifer seed bug.

Google’s AI answer for this search describes leaf-footed bugs as the genus Leptoglossus. That covers the common garden species, but not all of them. The giant leaf-footed bugs people often search for belong to a different genus, Acanthocephala. So the table below covers both groups.

Sizes and marks from UF/IFAS (EENY-072 and EENY-517), UC IPM, Iowa State Extension, Texas A&M and Mississippi State. Ranges overlap, so use the telling mark first.

Only one of these has the official common name “leaffooted bug”. According to UF/IFAS, that is Leptoglossus phyllopus, the eastern species. Florida alone has at least nine Leptoglossus species, and the straight white bar is what separates L. phyllopus from the rest. In California, UC IPM names L. zonatus as the most destructive one.

Giant leaf-footed bugs

Giant leaf-footed bugs are the big ones that make people stop and stare. Texas A&M calls Acanthocephala declivis one of the largest true bugs in Texas, at over an inch long. Mississippi State says the group is easy to spot by its “uncommonly large, muscular looking” back thighs.

They feed on trees and shrubs, rarely build up in large numbers, and are not serious garden pests. Are giant leaf-footed bugs harmful? Not to you. Nevertheless, handle them with care, because a wheel bug, which does bite, looks a lot like one. See the look-alike table below before you pick one up.

The leaf-footed bug in your house in fall

If you found one on a window, a wall or a curtain in fall or winter, it is most likely a western conifer seed bug. Iowa State Extension calls it a harmless “accidental invader” that slips indoors to spend the winter. It feeds on pine and fir cones in summer, and the University of Connecticut says it was first found there in 1985. There is more on what to do in the section on leaf-footed bugs in the house.

Leaf-footed bug nymphs

Leaf-footed bug nymphs are small, wingless, orange to reddish-brown bugs with dark heads and black legs. UC IPM says they cluster tightly together on stems, leaves and fruit. They pass through 5 stages, getting larger and browner each time, and become winged adults in 5 to 8 weeks.

The young ones do not have the leaf-shaped flags yet. UF/IFAS says the flags only appear in the later stages, along with the adult colors. So a group of small orange bugs on a tomato, with no flags in sight, can still be leaf-footed bugs. The clustering is the clue. Texas A&M AgriLife also notes that the nymphs “move like spiders”.

Are leaf-footed nymphs harmful? They feed just like the adults, but not as deeply. UC IPM explains that small nymphs sip from the surface of the plant, while adults probe deep into fruit for the seeds. Still, a large group on a small green fruit can make it drop. They are also the easiest stage to kill, because they cannot fly away.

Leaf-footed bug eggs

Leaf-footed bug eggs are golden brown to bronze, shaped like tiny barrels lying on their side, and laid end to end in a single row along a stem or the middle vein of a leaf. UC IPM says most chains hold 10 to 15 eggs, though over 50 have been seen. They hatch in about a week.

The row is what gives them away. UF/IFAS describes a stiff rod in which each egg looks like one joint of the rod. Gardeners on Reddit describe them as “perfect cube eggs” in a straight line, sometimes laid on window glass. Check the undersides of leaves too, because UC IPM tells gardeners to destroy any egg masses found there.

Two other common garden bugs lay eggs that people confuse with these. One of them is a pest. The other is a predator you want to keep, so it pays to know which eggs you are about to crush.

Leaf-footed and assassin bug eggs from UC IPM and UF/IFAS. Squash bug eggs from the University of Minnesota.

Leaf-footed bug vs stink bug, assassin bug and other look-alikes

Check the back legs first. Only a leaf-footed bug has flat, leaf-shaped flags on the hind legs. Stink bugs are wider and shaped like a shield. Assassin bugs have a short, curved beak and thick front legs instead. Kissing bugs have thin back legs and a pointed “cone nose”.

Getting this right matters both ways. Assassin bugs and wheel bugs eat garden pests, so killing them by mistake costs you free pest control. Also, both of them can bite, unlike a leaf-footed bug. On Reddit, “friend or foe?” posts about orange nymphs on tomatoes come up again and again for this reason.

Family traits from the Missouri Department of Conservation. Assassin bug nymphs from UC IPM. Wheel bug bite from Mississippi State. Squash bug from the University of Minnesota. Kissing bug and wheel bug features from Texas A&M’s kissing bug identification sheet.

For the leaf-footed bug vs stink bug question, the shape is enough. Seen from above, a stink bug looks like a small shield, while a leaf-footed bug is long and narrow, with the leaf flags on its legs. They are related, and both release a smell when handled. However, they belong to different families.

Nymphs are harder. UC IPM says small leaf-footed bug nymphs can be confused with nymphs of the assassin bug Zelus renardii. The difference is in the legs: assassin bug nymphs have light-colored legs and antennae, while leaf-footed bug nymphs have dark ones. A Reddit tip adds that the assassin has a short, sharp beak, while the leaf-footed nymph has a longer, straw-like one.

Not sure which one you have? A clear photo of the back legs through our free insect identifier will settle it in seconds. If you already have bites and want to know what caused them, see our bug bite identification guide instead.

Do leaf-footed bugs bite? Are they harmful?

No. Leaf-footed bugs do not bite people or pets. They feed only on plants, and Mississippi State says plainly that coreids are plant feeders, “so they do not bite.” They do not sting, carry disease to people, or breed indoors. The only thing they do to people is smell bad when handled.

The smell is a defense. Both nymphs and adults release it from a pair of glands on the thorax. According to Mississippi State, it can stay on your hands for several hours, even after you wash them. It is unpleasant but harmless. Gloves solve it. Interestingly, some people on Reddit say certain leaf-footed bugs smell faintly of apples rather than the sharp, cilantro-like smell of a stink bug.

Are leaf-footed bugs harmful to dogs? We found no report of harm to dogs or cats from any of the extension sources we read. Mississippi State says the smell is there to repel animals that try to eat them, so most pets drop one quickly. Call your vet if your pet seems unwell after eating any insect.

The same goes for the question of whether they are poisonous. A leaf-footed bug has no venom, and it does not bite. The real risk is a mix-up: an assassin bug, a wheel bug or a kissing bug, picked up by someone who thought it was harmless. That is why the table above is worth a look before you handle any big, brown bug.

What leaf-footed bugs eat, and the damage they do

Leaf-footed bugs suck juice from fruit, nuts and seeds. The most common targets in home gardens are tomatoes and pomegranates, according to UC IPM. They also feed on peppers, eggplant, okra, beans, peas, squash, cucumbers, citrus, pecans, almonds, pistachios, peaches, berries and sunflowers. In spring, before fruit ripens, they live on thistles and other weeds.

Their beak is longer than half their body, as UC IPM points out. They push it into the plant, inject saliva, and drink. On a hard seed, such as an almond kernel, they release enzymes that turn part of it to liquid. The damage depends on the size of the fruit when they feed on it. By contrast, the leaves and shoots of most ornamental plants show no visible damage at all.

In Texas, AgriLife adds cucumbers and prickly pear cactus to the list. Mississippi State says the bugs “love tomatillos”. UF/IFAS lists apple, blueberry, blackberry, peach, plum, pomegranate, potato and sunflower among the crops sometimes heavily hit. So if you grow fruit or seeds, you can expect to see them at some point.

Leaf-footed bug damage on tomatoes, and whether the fruit is safe to eat

Yes, a tomato with leaf-footed bug marks is safe to eat. UC IPM says a yeast the bugs carry can discolor fruit, but it does not stop the fruit from being harvested and eaten. Feeding on a ripe tomato leaves only slight discoloration, which UC IPM says “should be of no concern” to backyard gardeners.

Small, young fruit is where the real losses happen. AgriLife describes “yellow, bleached-looking marks with hardened skin around it”, or a rotten spot. Mississippi State notes soft, sunken spots, and says even lightly damaged fruit can taste off. Cut away hard or discolored spots if you do not like the texture, and wash the fruit well.

Stages and safety from UC IPM. Mark descriptions from Texas A&M AgriLife and Mississippi State. UC IPM says the yeast infection is worst when rain is abundant.

Is it leaf-footed bug damage or stink bug damage?

You cannot tell them apart from the fruit alone. Texas A&M’s field guide says leaf-footed bug damage is similar to stink bug damage, and both leave pale, hard blotches under the skin. The only reliable way to know is to find the bug itself, so check the plant in the early morning, when the bugs are slow. If the fruit has open, chewed scars instead, with dark droppings on the leaves, a caterpillar did it: see our guide to hornworms on tomato plants.

Fortunately, the answer barely changes what you do. Both bugs respond to the same steps: handpicking into soapy water, removing weeds, and row covers. Sprays are a last resort for both. The difference matters most for nymphs, because killing assassin bug nymphs by mistake removes one of your best helpers.

Pomegranates, nuts and citrus

On pomegranates, late-season feeding usually leaves no mark on the outside. Inside, though, the seeds can darken and shrivel, especially if fungus gets in through the hole, according to UC IPM. Large groups also leave droppings on the skin.

Nut trees take the worst of it. UC IPM says early feeding on almonds and pistachios can kill the kernel, and later feeding leaves a black stain. On pecans, UF/IFAS links the eastern species to black pit, where nuts go black inside and fall early, and to kernel spot. On citrus, the same source says feeding causes early color change and fruit drop.

Leaf-footed bug life cycle, and why some years are worse

A leaf-footed bug goes from egg to adult in about 6 to 9 weeks. The eggs hatch in about a week, and UC IPM says nymphs reach adulthood 5 to 8 weeks later. Adults live a long time: in research reported by UF/IFAS, western leaffooted bug females lived 73 days. Most areas get 2 to 3 generations a year.

Adults spend the winter in groups, in woodpiles, barns, sheds, palm fronds, juniper or citrus trees, and under loose bark. In spring they wake up hungry and feed on the seeds of weeds first. Then, as garden fruit starts to ripen, they move in. UC IPM says a single overwintered female can lay over 200 eggs in two months.

Stage lengths from UC IPM. Five nymph stages from UF/IFAS. Warmer weather shortens each stage.

So why are some years so much worse? UC IPM says cold winters kill many of the hiding adults, and that big outbreaks often follow mild winters. Natural enemies, rain and the food supply also push numbers up or down. A mild winter followed by a hot summer is the classic setup for a bad year.

The leaf-footed bug season, month by month

No single source lays this out, so we pieced it together from UC IPM, Mississippi State, Texas A&M AgriLife and Iowa State. It tells you what you are likely to see in each part of the year, and the one job worth doing then. In Florida and the Deep South, adults can show up in any month, so treat the table as a guide, not a calendar.

Our calendar. Spring timing and overwintering from UC IPM, the late summer peak from Mississippi State, bloom timing from Texas A&M AgriLife, and fall entry from Iowa State. Exact months shift with your climate.

How to get rid of leaf-footed bugs

The best way to get rid of leaf-footed bugs is by hand. Check your plants every day or two, knock the bugs into a bucket of soapy water early in the morning, and destroy the egg chains. Then clear nearby weeds and cover young plants next season. UC IPM says insecticides are rarely needed in home gardens.

The steps below run from free to costly. Start at the top. For most gardens, a few minutes each morning for two or three weeks is enough to save the crop. In fact, UC IPM says that in most years the damage in home gardens is low enough to live with.

1. Decide whether you need to act at all

A few bugs on a big plant with mostly ripe fruit are not worth a fight. UF/IFAS calls this your action threshold: the point where the damage is more than you are willing to accept. Minor damage may need nothing but watching. On the other hand, clusters of nymphs on small green fruit need action now, because that is where fruit gets lost.

2. Handpick into soapy water (free)

Handpicking is the main tool, and it works. UF/IFAS calls destroying the eggs, nymphs and adults by hand “a very effective method”. Fill a cup or bucket with water and a squirt of dish soap. The soap breaks the surface of the water, so the bugs sink and drown instead of floating.

Do it in the morning, when the bugs are cool and slow. Hold the cup under the cluster first, because nymphs drop when disturbed. One Reddit gardener puts it simply: approach them from the top. Wear gloves for the smell. For a branch covered in nymphs, some gardeners dip the whole branch into a bucket instead.

3. Vacuum the clusters (cheap)

A small handheld vacuum is the fastest way to deal with a large group. UC IPM says a vacuum kept just for this job can cut numbers well, if you use it regularly. It works best on nymphs. Adults often fly off before you reach them, so go out early, while they are still sluggish.

4. Knock nymphs out of trees

For a pomegranate or other small fruit tree, UC IPM suggests knocking the nymphs down with a stick, by shaking the branches, or with a strong spray from the hose. Lay a white sheet under the tree first, so you can see them fall and crush them. Prune the lowest limbs so there is space under the tree to work.

This works on nymphs, but not on eggs, and adults simply fly away. So UC IPM says to repeat it every 1 to 2 weeks until most of the bugs are gone.

5. Cover plants early

A row cover is a light, see-through fabric that lets in sun and rain but keeps bugs out. Timing is everything. UC IPM warns that covers must go on before the bugs arrive and lay eggs, or you trap the bugs inside with your plants. Tomatoes pollinate themselves, so they still set fruit under a cover.

The trade-off is that a cover also keeps out bees and the predators that eat aphids. As a result, aphids and whiteflies can build up underneath. For a few prized fruits, some gardeners slip a small mesh bag over each one instead, which protects the fruit and leaves the rest of the plant open.

6. Clear weeds and winter hiding places

Weeds are what the bugs live on before your fruit ripens. UC IPM recommends removing weedy areas near the garden, or keeping them closely mowed. Thistles matter most, because UC IPM names them as a favorite spring food. In winter, move woodpiles, pick up fallen fruit, and check under loose bark, where the adults gather in groups.

7. Plant a trap crop, and then deal with it

A trap crop is a plant the bugs like more than your vegetables. Mississippi State says about a dozen large-flowered sunflowers can pull leaf-footed bugs away from an average garden. But there is a catch: the bugs lay eggs on the sunflowers too. Kill the bugs there before the nymphs grow up, or you have built “a nursery crop, rather than a trap crop”.

It does not always work, either. In the most popular Reddit thread on this problem, a Houston gardener with sunflowers blooming everywhere reported the bugs were “all over my tomatoes” anyway. Treat a trap crop as a place to concentrate the bugs for handpicking, not as a cure on its own.

8. Let their natural enemies help

Leaf-footed bugs have plenty of enemies. UC IPM names a tiny wasp, Gryon pennsylvanicum, that kills the eggs, and the tachinid fly Trichopoda pennipes, which lays its eggs on large nymphs and adults. Birds, spiders and assassin bugs eat them too, and gardeners on Reddit add lizards and sparrows.

Natural enemies will not wipe the bugs out on their own. Still, UC IPM says they are worth protecting, because they control other pests as well. Broad sprays kill them first. That is one more reason to save insecticides for last. For more on letting predators do the work, see our guide to getting rid of aphids without wiping out the helpers.

9. Insecticidal soap, neem and pyrethrin: small nymphs only

These gentler sprays help only against young nymphs. UC IPM says insecticidal soap, neem oil and pyrethrin “may provide some control of young nymphs only”. Adults have a tougher body, and they fly off when sprayed. A Reddit gardener summed it up: the adults seem “too big to be susceptible to insecticidal soap or oils”.

If you use one, spray the nymph clusters directly, since these products only work on contact. Cover the undersides of leaves, where nymphs gather. Follow the label for the amount, the timing and how often to apply.

10. Insecticides, last and only if needed

If handpicking and the other steps are working, you do not need an insecticide. UC IPM says most products sold to homeowners have only a temporary effect on leaf-footed bugs. The bugs also feed close to harvest, when spraying food you are about to eat is a poor trade.

For a severe outbreak, UC IPM says pyrethroids such as permethrin work best, but they are “quite toxic to bees and beneficial insects”. Aim them at small nymphs, right after eggs hatch. UF/IFAS advises treating only the affected plants, not the whole yard. Then wait the number of days the label gives before you pick and eat, and wash the fruit.

What does not work, or is not true

Some of the most shared advice about leaf-footed bugs is wrong or unsafe, and some of it ranks near the top of Google. Soap and neem do little to adults. Diatomaceous earth sprinkled around plants misses a bug that lives on the fruit and flies. A tray of rubbing alcohol is a fire risk. Here is what the evidence says.

• Myth 1

  “Leaf-footed bugs are a kind of stink bug.”

  Truth: They are relatives, not stink bugs. Leaf-footed bugs are in the family Coreidae, while stink bugs are in the family Pentatomidae, as UC IPM and the Missouri Department of Conservation both note. Even one university fact sheet calls them members of the stink bug family, which is not correct.

• Myth 2

  “Leaf-footed bugs are also called squash bugs.”

  Truth: The squash bug is a separate species in the same family. It has no leaf flags on its legs and sticks mostly to squash and pumpkins, according to the University of Minnesota.

• Myth 3

  “Sprinkle diatomaceous earth around the base of your plants.”

  Truth: Google's AI answer suggests this, but the bugs live on the fruit and fly, so a powder on the soil barely touches them. If you use diatomaceous earth for anything, use an EPA-registered product exactly as labeled, in cracks and crevices, never spread across the garden.

• Myth 4

  “Neem oil or soap spray will clear them.”

  Truth: UC IPM says these give some control of young nymphs only. Adults shrug them off and fly away.

• Myth 5

  “Shake them into a tray of rubbing alcohol.”

  Truth: One extension article suggests this. EPA warns that rubbing alcohol can harm you and “can easily ignite with a spark or cigarette.” Soapy water does the same job with no fire risk.

• Myth 6

  “They bite.”

  Truth: They cannot bite people. They feed only on plants. The bugs that bite and look similar are assassin bugs, wheel bugs and kissing bugs.

• Myth 7

  “A tomato they fed on is poisoned or unsafe.”

  Truth: UC IPM says the yeast they carry only discolors the fruit and does not stop it from being eaten. Throw out only fruit that is rotting.

• Myth 8

  “The ones in my house are breeding indoors.”

  Truth: Iowa State says western conifer seed bugs cannot breed inside a house. They only came in to spend the winter.

Leaf-footed bugs in the house

A leaf-footed bug in the house in fall or winter is almost always a western conifer seed bug looking for a warm place to spend the winter. Iowa State says it does not bite, sting, feed or damage anything indoors, and it cannot breed inside. Pick it up or vacuum it, and seal the gaps it came through.

These bugs gather on warm, sunny south walls in late summer. After dark, they crawl into gaps in siding, around windows and under eaves, says Iowa State. From there they wander into rooms on warm winter days. The University of Connecticut notes that they are slow in the cold, so they are easy to catch and put outside.

• Seal the way in. Caulk cracks around window frames, and fix torn screens and worn door sweeps before fall.
• Remove the ones you see. Sweep them up, vacuum them, or carry them outside on a piece of paper.
• Empty the vacuum outdoors. Bugs in the bag can still give off their smell.
• Skip the spray. Iowa State says spraying the house in winter or spring is of little benefit.

The same fall habit brings other bugs indoors, too. If the one on your window has an orange shell and spots, our guide to ladybugs vs Asian lady beetles will help. For a large, dark bug you found in the kitchen or bathroom, our water bug guide sorts out the usual suspects.

When to call someone

Most leaf-footed bug problems are a do-it-yourself job, and a pest company is rarely worth the cost for a vegetable garden. Call for help if you grow nuts, citrus or pomegranates in numbers, if you think the bug is a kissing bug, or if you cannot tell a pest from a predator.

• Your county extension office for an ID you are unsure of, or for orchard and nut trees, where the timing of control matters.
• The Texas A&M kissing bug program if the bug has thin back legs and a pointed cone nose. Send a photo first, and do not handle it with bare hands.
• A doctor if you were bitten at night by a bug you suspect was a kissing bug and you feel unwell. Leaf-footed bugs cannot cause a bite.
• A licensed pest professional if large numbers keep getting into your home every fall through gaps you cannot reach.
• Your landlord if you rent and fall invaders get in through damaged screens or windows.

For a quick answer before you call anyone, take a sharp photo of the bug from above, with the back legs in view, and run it through our bug identifier by picture. If the damage is on the leaves rather than the fruit, the culprit may be something smaller, such as spider mites.

Pest control disclaimer. Photo-based identification can help, but it is not always perfect. For dangerous spiders, large infestations, or anything you are unsure about, contact a licensed pest control professional.