Pavement Ant Information Page 
         The Pavement ant : 
|     Tetramorium caespitum         |
Appearance:  Pavement ants are monomorphic all one size about an 1/8th of an inch with two nodes in the petiole. The pavement ant is dark brown in color. The head and thorax are highly sculptured with numerous grooves when viewed from above. The winged reproductives are larger then the workers. Swarming ants are sometimes confused with swarming termites see comparison. [comparison link]
Biology: Pavement ants are social insects which means they live together in colonies. The pavement ants' common name is derived from their habit of nesting on or near cement walkways and driveways. These ants nest next to foundations, under stoops and under the slab portions of structures. Pavement ants forage for food and water thorough the year in heated structures. Winged reproductives usually swarm in the spring but they can be seen throughout the year especially during warm sunny days of september and october.
Conducive Factors: Pavements will eat a Variety of foods especially sweets and carbohydrates. During periods of high egg production these ants may favor protein food sources. Pavements will seek out internal water sources especially during long periods of drought. Some conducive factors include soiled garbage pails, crumbs on floors, dirty recyclable container areas and leaking or dripping plumbing.
Damage:  Pavement ants excavate large amounts of sand and soil from under stoops , brick walkways and slabs. Over time this activity can cause these items to sink and settle causing structural damage. However, the most common complaint is ants seen foraging for food and water on floors and counters of kitchens. bathrooms and other areas of the house. Foraging ants will contaminate stored food products.
Control: The first step in pavement ant control is a thorough inspection in and around the structure. You want to inspect all areas that are conducive to pavement ants especially areas in around the foundation. Pavement ants nest in the soil under slabs, stoops, walkways and around the foundation. Its important to remember even if the ants are seen on the 2nd story of a house they have most likely trailed from a nest located in the soil around and under the house. Pavement ant nests can be quite large and are difficult to get at when below concrete slabs. A variety of ants baits are extremely effective in controlling pavement ants. The worker ants feed on the baits then return to the nest where they feed and spread the material throughout the colony. Residual sprays offer temporary relief as they kill the worker ants that cross the residual barrier however the nest will continue to survive in the soil location.

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