Georgia is home to several stink bug species, including both native varieties and the invasive brown marmorated stink bug, which has established itself across the northern and central parts of the state. These shield-shaped insects are harmless to people and pets, but they become a serious nuisance when they swarm into homes each fall and can cause millions of dollars in crop damage across Georgia’s agricultural regions.
Species You’ll Find in Georgia
Four stink bug species cause the most problems in Georgia. The brown marmorated stink bug is the invasive one, originally from China, Japan, Korea, and Taiwan. Adults are larger than native species at roughly half an inch to two-thirds of an inch long, with a brown mottled pattern. The easiest way to identify them: look for white bands on the antennae and legs, and alternating dark and light stripes along the edge of the abdomen. They also lack the pointed “shoulder” spines that some native species have.
The three native species that give Georgia growers trouble are the brown stink bug, the southern green stink bug, and the green stink bug. The brown stink bug is especially abundant in the Southeast. The southern green stink bug, as its name suggests, is concentrated in southern states. All four species attack many of the same crops, so Georgia farmers often deal with overlapping populations throughout the growing season.
When Stink Bugs Show Up in Homes
The annual home invasion follows a predictable pattern. Stink bugs mature into overwintering adults in September or October, then start seeking shelter for the winter. They’re looking for dark, dry, tight spaces, and your house fits the description perfectly. Barns, storage buildings, RVs, enclosed trailers, and office buildings are all fair game too.
They squeeze through cracks and crevices around improperly sealed doors and windows. Once inside walls or attic spaces, they enter a dormant state called diapause and stop feeding entirely. The problem is that warm days during winter can wake them up prematurely, sending confused adults walking and flying around inside your house in the middle of January.
In spring, they emerge from hiding and head straight for developing flowers and fruits to feed before laying eggs. Plants and trees near the structure where they overwintered get hit hardest, since a concentrated group of hungry adults descends on whatever is blooming nearby. Females lay clusters of about 28 light green or light blue eggs on the undersides of leaves, and the cycle starts again.
Damage to Georgia Crops and Gardens
Stink bugs feed by piercing plant tissue and sucking out the juices, leaving dimpled, scarred, or deformed fruit behind. In Georgia, the crops at highest risk include peaches, pecans, cotton, soybeans, blueberries, corn, tomatoes, beans, okra, and eggplant. For a state that ranks near the top nationally in peach and pecan production, that’s a significant economic threat. University of Georgia researchers estimate that quality losses from stink bug damage cost Georgia growers between $10 and $20 million for every penny of quality deduction applied at market.
Home gardeners see similar damage on a smaller scale. Tomatoes develop hard white or yellow spots beneath the skin where the bug fed. Peaches get dimpled, cat-facing scars. Beans and peas may have shriveled or discolored seeds inside pods that look fine from the outside. If you’re growing any of these crops in Georgia, regular scouting for stink bugs during summer is worth the effort.
Are Stink Bugs Harmful to People or Pets?
Stink bugs don’t bite, sting, or carry diseases. Their mouthparts are built for piercing plant stems, not skin, and the rare occasion when one lands on a person and seems to “bite” is almost always accidental contact rather than aggression. They aren’t poisonous or venomous either, so dogs and cats that encounter them are safe, though a pet that eats one will likely regret the taste.
The defensive fluid they release when threatened or crushed can cause mild skin irritation in people with sensitive skin, but for most people the only consequence is the smell. That odor, often described as a mix of cilantro and burnt rubber, is produced by glands on the underside of the thorax. One common myth: killing a stink bug does not attract more of them. The odor is unpleasant, but it’s not a signal that draws others to your home.
How to Remove Stink Bugs Indoors
Indoor pesticides are largely ineffective against stink bugs. The bugs overwinter inside walls and voids where sprays can’t reach, and killing them in hard-to-access places just leaves carcasses that attract carpet beetles and other scavengers. Instead, focus on physical removal.
A vacuum cleaner is the fastest option for clearing a room. Use a shop vac or a vacuum with a bag you can immediately seal and discard, since the smell can linger inside the machine. If you’d rather not deal with the odor at all, gently sweep or flick individual bugs into a container of soapy water. The soap breaks the surface tension and drowns them quickly.
For rooms where stink bugs keep appearing, a simple light trap works well. Fill a roasting pan with soapy water, place it in a dark room, and aim a desk lamp at the water’s surface. Stink bugs are drawn to the light and fall into the water. This won’t eliminate every bug, but it can significantly reduce the number wandering your living space during winter warm spells.
Sealing Your Home Before Fall
Exclusion is the most effective long-term strategy, and the work needs to happen before stink bugs start seeking shelter in September. A gap of just 1/16 of an inch is wide enough for insects to enter, so thorough sealing makes a real difference.
- Doors: Install door sweeps on all exterior doors. Lie on the floor and look for light coming through at the base, paying special attention to the bottom corners. Seal the outside edges of thresholds with caulk. Garage doors need a rubber bottom seal (vinyl cracks in cold weather).
- Windows: Caulk cracks around window frames using silicone or acrylic latex caulk. Repair any torn or gapped window screens. For sliding glass doors, line the bottom track with half-inch to three-quarter-inch foam weatherstripping.
- Utility openings: Seal gaps where pipes, wires, outdoor faucets, gas meters, dryer vents, and cable lines enter the house. Use caulk, cement, expandable foam, or copper mesh depending on the size of the gap.
- Vents and chimneys: Cover attic, roof, and crawl space vents with quarter-inch wire mesh. A chimney cap prevents entry through the flue.
If sealing every gap feels impractical, an exterior barrier treatment with a long-lasting insecticide applied around the foundation and entry points in early fall can supplement your efforts. Perimeter sprays need to be timed correctly to work. Apply them before the bugs begin congregating on sunny exterior walls, which in Georgia typically starts in late September to October.
Natural Predators in Georgia
Georgia’s ecosystem does provide some natural checks on stink bug populations, though none are enough to fully control them. Fire ants are significant predators of stink bug eggs, particularly in peanut and cotton fields. A type of grasshopper in the genus Conocephalus dominates as an egg predator in soybean fields. A parasitic fly called Trichopoda pennipes is responsible for nearly all parasitism of nymph and adult stink bugs in the state, laying its eggs on the bug’s body so larvae can feed on it from the inside.
Tiny parasitic wasps also attack stink bug egg masses, though at low rates, accounting for less than 10% of eggs. University of Georgia researchers are currently working with European scientists to evaluate a parasitic wasp of Mediterranean origin that could supplement native parasite populations. For home gardeners, encouraging a diverse insect community by reducing broad-spectrum pesticide use can help keep stink bug numbers in check, even if it won’t eliminate them entirely.