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Pharaoh ants are common pests in homes, apartments, hospitals, nursing homes, and other facilities. Because of their small size, they are very difficult to eradicate.
These ants nest between walls, under floors, above ceilings, behind baseboards and switch plates, in old trash, in folded bathroom linens, or outside in gardens and along walks. They will nest in porous substrates in warm places near furnaces, heat ducts, and hot water pipes which are also near moist conditions or open sources of water.
Pharaoh ants feed on a wide variety of foods. Although it is difficult to pinpoint a specific preference, they can commonly be found feeding on syrups, fruit juices, honey, jelly, cakes, pies, greases, dead insects, or meats and blood.

Control and Prevention

This species of ants are extremely difficult to control due to the small size, their ability to nest anywhere, and their wide preference for different types of foods. In addition, their nests tend to be large and spread out. An attempt to use sprays or aerosols may cause the nest to scatter (called budding), making the management efforts more difficult.
Control methods should center on the excessive use of baits. These baits should be both sugar (carbohydrate) and grease (protein) based and should be concentrated around areas that the ants have been seen foraging. Also, sanitation is an important management task. The removal of current food sources and the placement of bait stations will dramatically improve management efforts. In the southern United States, where Pharaoh ants may also be nesting outside, additional steps should be taken outdoors to keep them from coming in. These steps include sanitation practices outside and the application of a liquid barrier treatment along the foundation.
If the Pharaoh ant infestation is excessive and attempts to control them have failed, then you should consider hiring a pest management professional.

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