Tennessee is home to several stink bug species, both native and invasive, that become a nuisance for homeowners and a real problem for farmers. The green stink bug is the most common species in the state, followed by the brown stink bug, with invasive species like the brown marmorated stink bug increasingly showing up across multiple regions. Activity peaks from spring through fall, and the biggest headache for most Tennesseans comes in late autumn when these insects try to move indoors for the winter.
Species Found in Tennessee
The green stink bug is the dominant plant-feeding species in Tennessee, easily recognized by its bright green body about half an inch long. The brown stink bug is the second most common, and together they make up the bulk of what farmers and gardeners encounter. Other plant-feeding species include the red-shouldered stink bug, the dusky brown stink bug, and the harlequin bug, which has a striking black body patterned with orange and red markings and tends to target plants in the cabbage family.
The southern green stink bug is less common overall but can appear in larger numbers after mild winters, especially in Tennessee’s southernmost counties. Two invasive species are expanding their range in the state: the brown marmorated stink bug and the redbanded stink bug. The brown marmorated stink bug is the one most likely to invade homes in large numbers. It closely resembles the rough stink bug, which is actually a beneficial predator.
Not all stink bugs are pests. The spined soldier bug and the twospotted stink bug are predatory species that feed on harmful insects. They’re sometimes mistaken for brown or dusky brown stink bugs. One way to tell them apart: predatory stink bugs have a beak (the mouthpart tucked under their head) roughly twice as wide as their antennae, while plant-feeding species have a beak about the same width as the antennae. If you spot a stink bug attacking another insect in your garden, leave it alone.
When Stink Bugs Are Most Active
Stink bugs emerge from overwintering sites in early spring, typically around March or April, as temperatures start to climb. They immediately begin searching for food and mates, and the warm weather drives reproduction that builds their population steadily through spring and summer. By midsummer, you’ll notice them on garden plants, fruit trees, and row crops across the state.
The real surge indoors happens in late fall. As temperatures drop, stink bugs start looking for sheltered spots to survive the winter, and your house fits the bill perfectly. They gather on sun-warmed exterior walls, then squeeze through any gap they can find. Once inside wall voids or attic spaces, they enter a dormant state until spring warmth draws them back out, sometimes into your living space rather than outdoors.
Crop and Garden Damage
Stink bugs feed by piercing plant tissue with their needle-like mouthparts and sucking out fluids. In Tennessee agriculture, soybeans and cotton take the heaviest losses. On cotton, stink bugs puncture the bolls and attack the developing seeds inside, often causing the boll to abort entirely. Soybeans suffer similar piercing damage that reduces seed quality and yield. Tennessee farmers report needing stronger and more frequent pesticide applications to control mature stink bugs, driving up production costs.
In home gardens, stink bugs target tomatoes, peppers, beans, corn, and fruit trees. The damage shows up as dimpled, discolored spots on fruit where the bug inserted its mouthparts. Tomatoes develop pale, corky patches under the skin. The feeding doesn’t always destroy the fruit, but it makes it unappealing and can introduce secondary infections at the wound site.
Are They Harmful to People or Pets?
Stink bugs don’t bite, don’t sting, and don’t transmit diseases. Their only defense is the foul-smelling secretion they release when threatened or crushed, which is where the name comes from. For humans, they’re a nuisance, not a health threat.
Pets are a slightly different story. Dogs and cats that chew on or eat stink bugs can experience irritation to the tongue, gums, lips, and the inside of the cheek from those same secretions. The chemicals also irritate the gastrointestinal tract, which can cause vomiting or excessive drooling. These symptoms are temporary and not considered serious, but a dog that develops a taste for catching stink bugs may have repeated unpleasant episodes.
Keeping Stink Bugs Out of Your Home
Sealing entry points before fall arrives is the single most effective prevention step. Stink bugs can fit through surprisingly small cracks, so a thorough inspection of your home’s exterior is worth the effort. Focus on gaps around window frames, door frames, and any spot where pipes or cables enter the structure. Use caulk on stationary gaps and weatherstripping on doors and windows that open and close.
Pay special attention to transition zones where different building materials meet: wood trim against brick, siding against the foundation, or where an addition joins the original structure. These seams develop small separations over time that are invisible at a glance but wide enough for a stink bug. Torn window screens and worn-out door sweeps are high-traffic entry points that are cheap and easy to fix. Doing this work in late August or September, before the first cool nights send stink bugs searching for shelter, gives you the best results.
Removing Stink Bugs Indoors
The cardinal rule: don’t crush them. Squishing a stink bug releases the odor you’re trying to avoid, and it can stain surfaces. They move slowly enough that manual removal works well for small numbers. Flick the bug into an empty water bottle using the cap, then tighten the lid to contain the smell. You can reuse the same bottle for days. Alternatively, grab the bug gently with a plastic bag turned inside out, then seal it.
For larger invasions, a vacuum is the fastest tool, but with a caveat. Never suck stink bugs into a bagless vacuum you use for regular cleaning, because the smell will linger. Many homeowners in heavily affected areas keep a small, cheap wet/dry vacuum dedicated entirely to stink bug duty. After each session, dump the contents into a garbage bag and seal it tightly. You can reopen the bag to add more bugs until trash day.
A clever workaround: stretch a knee-high stocking over the outside of the vacuum hose, secure it with a rubber band, and push the excess stocking into the tube. Bugs get trapped in the stocking instead of entering the vacuum. When you turn the vacuum off, pinch the stocking closed, pull it out, and dump the captured bugs into soapy water.
That soapy water method works as a standalone trap, too. Fill a straight-sided container about a quarter full with water and add a teaspoon of liquid dish soap. When disturbed, stink bugs instinctively drop downward rather than fly. Hold the container beneath them on a wall or curtain, give them a nudge, and they’ll fall right in. The soap breaks the surface tension so they sink and drown quickly.
Protecting Your Garden
In a home garden setting, hand-picking stink bugs into a bucket of soapy water is practical for small plots. Check plants in the morning when bugs are sluggish. Row covers can physically exclude them from vulnerable crops, though you’ll need to remove covers during flowering for pollination on crops like squash and peppers.
Encouraging predatory stink bugs and other natural enemies helps keep populations in check without spraying. The spined soldier bug, which is native to Tennessee, preys on many of the same caterpillars and beetle larvae that damage gardens. Avoid broad-spectrum insecticide sprays when possible, since they kill beneficial predators along with the pests, often making the stink bug problem worse in subsequent weeks as populations rebound without natural controls.
For severe garden infestations, insecticidal soap sprayed directly on the bugs provides control without long residual effects on beneficial insects. It works on contact, so thorough coverage matters, and repeat applications are usually necessary since it doesn’t prevent new arrivals.