- Size: 1/16 to 1/8 inch.
- Color: brown to black.
- Thorax without spiny projections.
- One node between the thorax and abdomen, hidden by the rest of the abdomen.
- Produce a distinctive sweet, acrid smell when crushed.
- Workers run around with abdomens sticking up in the air when disturbed.
Habits of Odorous House Ants:
- Form colonies by swarming (May – mid-July) and budding.
- Single or multiple-queen colonies; 10,000+ workers.
- Life span of workers and queens: several years.
- Prefer sweets.
- Enter structures after rain washes off plant honeydew.
Damage From Odorous Ants:
- Possible contamination of food and food preparation surfaces.
- Nests outdoors under stones, logs, and in the nests of larger ants.
- Nests indoors within wall or floor voids, around heat sources, (e.g., hot water pipes and heaters, crevices around sinks and cabinets, etc).
How to Control and Kill Odorous Ants:
- Cracks and gaps in exterior walls which provide access to voids or interior areas should be sealed.
- Debris around the exterior of the structure and other items on the ground where ants nest should be removed.
- Baits should be placed where ant trails have been established and in locations where the ants have been sighted.
- Unless using containerized baits indoors, baits should be placed so they are inaccessible to children and pets.
- Sweet baits are the most effective, but if acceptance is low, use of a protein bait should be considered.
- Exterior nests should be drenched with a liquid formulation.
- Nests within wall voids are more easily treated by aerosol injection or application of a dust formulation.
- When the nests can not be located, a barrier spray should be applied to foundations and the soil immediately adjacent to the building.
- Controlling aphids on ornamental plants and trees around structures removes one of the ant’s primary food sources.