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As pests

Carpenter ants can damage wood used in the construction of buildings. They can leave behind a sawdust -like material called frass that provides clues to their nesting location. Carpenter ant galleries are smooth and very different from termite -damaged areas, which have mud packed into the hollowed-out areas. Carpenter ants can be identified by the general presence of one upward protruding node, looking like a spike, at the "waist" attachment between the thorax and abdomen (petiole). Control involves application of insecticides in various forms including dusts and liquids. The dusts are injected directly into galleries and voids where the carpenter ants are living. The liquids are applied in areas where foraging ants are likely to pick the material up and spread the poison to the colony upon returning.