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Why Box Elder Bugs Cover Wichita Homes Every Fall
Updated: Sep 24
Quick answer: Box elder bugs gather on Wichita homes in September and October because they are looking for a warm place to spend the winter. They pick the sunny south and west walls of your house. They do not bite, sting, or damage your home. But they get inside through small gaps, and once they are in, they are hard to remove.
What are box elder bugs in Wichita?
They are about half an inch long. Black bodies. Three red or orange stripes across the back.
You will see them in big groups. Dozens. Sometimes hundreds.
They feed on the seeds of box elder trees, maple trees, and ash trees. Wichita has plenty of all three.
Why are they on the side of my house?
Sunlight.
Box elder bugs love warm surfaces. As fall nights get cold, they move to the warmest spot they can find. That is usually the south or west wall of your home, because those walls soak up afternoon sun.
If your house sits near a box elder or maple tree, you will see more of them. A lot more.
Do box elder bugs hurt anything?
No. Here is the short list of what they will not do:
They do not bite people or pets.
They do not sting.
They do not chew wood or wiring.
They do not lay eggs inside your home.
Here is what they will do. They leave small stains on siding, curtains, and carpet. And they smell bad if you squash them.
According to K-State Research and Extension, the best control happens outside before they gather. You can read their full box elder bug guide from K-State Research and Extension.
How do they get inside my house?
Through gaps you cannot see from the couch.
Common entry points in Wichita homes:
Gaps under exterior doors
Torn window screens
Cracks where siding meets the foundation
Gaps around dryer vents and utility lines
Soffit and attic vents
They are flat. They squeeze into spaces thinner than a pencil.
What should I do if they are already inside?
Vacuum them. Do not spray inside your home.
Empty the vacuum canister outside right away, or the smell sticks around.
Sprays do not work well on box elder bugs indoors. They hide inside walls and behind trim, and they keep coming out for weeks.
How do I keep them out next year?
Timing is everything. Treatment works best in early fall, before they pile up on the wall.
Here is the order that works:
Seal gaps around doors, windows, and pipes with caulk
Repair window and door screens
Rake up seeds and leaves near the foundation
Get an exterior treatment on the sunny walls in early September
When should I call a pest control company?
Call when the groups keep coming back, or when you are finding them inside more than once a week.
An exterior treatment on the walls, eaves, and foundation gets them before they find a way in. That is the whole game with box elder bugs. Stop them outside.
Bug Shockers handles box elder bug control in Wichita, Derby, Andover, Rose Hill, Augusta, and El Dorado. No contracts. Family owned for four generations.
Frequently Asked Questions
Are box elder bugs dangerous to my dog? No. Box elder bugs do not bite or sting pets. A dog that eats one may drool or throw up because of the bad taste, but they are not poisonous.
Why are there so many box elder bugs this year? Warm, dry summers help more of them survive. Wichita summers usually give them exactly what they want.
Will killing the tree stop them? Removing a female box elder tree can help long term. But box elder bugs also feed on maple and ash, and they fly. Your neighbor's tree can still send them your way.
Do box elder bugs come back every year? Yes, unless you seal the gaps. The same house tends to get them year after year because it has the same sunny walls and the same openings.
Box Elder Bugs or Something Else? Text Us a Photo
Fall brings four different invaders to the same sunny wall, and people mix them up constantly.
Box elder bugs. Half an inch, black, three red or orange stripes across the back. Harmless.
Asian lady beetles. Round, orange to red, often with black spots and an M shape behind the head. These do bite, lightly, and they leave a yellow stain that smells.
Brown marmorated stink bugs. Shield shaped, mottled brown, about the size of a dime. Same fall behavior, much worse smell.
Cluster flies. Slow, sluggish flies that pile up in attics and window sills on warm days.
All four want the same thing: your warm south and west walls. But the timing and the treatment are not identical, so it is worth knowing which one you have. Text a photo to (316) 775-7867 and we will tell you. No charge.
Why Timing Beats Everything With Fall Invaders
This is the one pest where being two weeks early is worth more than any product.
Once box elder bugs are inside the wall void, you are stuck waiting them out. They come out a few at a time for weeks, on every warm day, all winter. There is no spray that reaches them in there, and treating inside does more harm than good.
Get the exterior handled in early September, before they pile up, and most of the problem never happens. Wait until they are covering the wall and you are already behind.
Wichita's mature box elder, maple, and ash trees are why this is an annual event here rather than a one off. Older neighborhoods with big shade trees get the heaviest gatherings.
What We Will Not Do
We will not sell you a treatment you do not need.
Box elder bugs are harmless. They do not bite, sting, chew wood, or breed indoors. If you are seeing a few dozen on a sunny wall in October and none inside, that is normal and you can leave it alone.
Call us when they are getting inside, or when it happens every single year. That is a sealing and exterior timing problem, and that one we can actually solve.
No contracts. Not now, not ever.
More Questions
Can you tell box elder bugs from stink bugs in a photo?
Yes. Text a clear photo to (316) 775-7867. Box elder bugs are long and black with red stripes. Stink bugs are shield shaped and mottled brown. Asian lady beetles are round and orange. All three show up on the same wall in fall.
Should I spray box elder bugs inside my house?
No. They hide in wall voids and behind trim, so indoor spraying does not reach them and they keep emerging for weeks. Vacuum them and empty the canister outside right away.
When is the best time to treat for box elder bugs?
Early September, before they gather on the wall. Once they are clustered, you are already late. Once they are inside the wall, the treatment window has closed for the year.
Do box elder bugs damage siding?
Not structurally. They can leave small dark stains on light siding, curtains, and carpet from their droppings, and squashing them stains worse.
Why does the same house get them every year?
Because the same house still has the same sunny walls and the same unsealed gaps. Sealing the entry points is what breaks the cycle, not killing this year's batch.
Bug Shockers handles fall invader control in Wichita, Derby, Andover, Rose Hill, Augusta, and El Dorado. Call or text (316) 775-7867.
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