Color: Yellowish to yellow-brown
Legs: 6
Shape: Segmented; profile unevenly rounded
Size: Workers are 1/8-3/16” (4-4.5 mm) long
Antennae: Yes
Region: Found throughout the United States
The yellow ant gets its common name from the yellow coloring of its body. Yellow ants are also referred to as citronella ants because of the citrus or lemon-like odor they give off when crushed. The most important structural pest species in this group is the larger yellow ant, Lasius interjectus, which is found from southern New England westward to Washington and southward to Florida and Mexico.
Yellow ants are primarily nocturnal. Swarms occur during June and July in the late afternoon of warm, humid, windless days.
Yellow ants feed almost exclusively on honeydew from underground insects. There is no record of them feeding on indoor food stores
The yellow ant does not have a stinger, but it can become a nuisance pest if a colony establishes itself within a premises.
Yellow ant nests are often established near areas of high moisture. In commercial properties, these ants can be found in damp wood, which is often located behind tile walls in a bathroom or in damp crawl spaces. Outside, nests are usually situated in soil adjacent to structures, along foundation walls or under rotten logs. Dirt mounds from the excavation of their tunnels can reach up to three feet in diameter.
If yellow ants are found inside, there is likely a moisture problem accompanied by decaying wood. Yellow ants can be removed temporarily with a vacuum cleaner.
Nest location is crucial to control yellow ants outdoors. Be sure to inspect along the foundation wall and look under stones, landscape timber and firewood. Business owners should consider working with a pest professional to prevent an infestation.
Yellow ants are attracted to honeydew, which is secreted by aphids. They are known to ‘farm’ aphids just for this purpose.
These are very common ants, often found in gardens and recreational grasslands. They’re known for creating anthills for their nests.
Yellow ants don’t cause structural problems, but they can be a nuisance if they establish a colony indoors. Due to their feeding behaviors, they can’t be caught with bait traps.