Pest Name: Odorous House Ants / “Sugar Ants”
Scientific Name: Tapinoma sessile
Signs of an Infestation: Depending on the nest location, Odorous House Ants (OHAs) can be active year round, but activity is highest between the months of May and August. They are most often seen in the kitchen or bathroom.
Characteristics and General Information: Odorous House Ants are dark brown or black in color. They nest near moisture sources such as standing water or leaking pipes. Though they are not a public health concern, they can be a severe nuisance. Their populations can reach exorbitantly high numbers and experiencing them overtake food, whether left out on the counter or concealed in cupboards, may be unsettling. When they are threatened or crushed, they give off an odor.
Control Measures: Colonies are nomadic and often move from place to place. Additionally, they have multiple queens. Baits and products that can be transferred to the colony are the most effective measures for elimination.
Caution: Do not use repellants and products that kill on contact, as these often exacerbate the issue.
Prevention: Due the pheromones left behind, these ants often come in waves as new colonies in surrounding areas find and follow the pheromone trails. Regular, ongoing perimeter treatments to maintain control are important to prevent future infestations.