They also contain a slow acting poison that gives the worker ants time to get back to the colony and feed them. The silk worm cocoon seems to be one of the only attractants for pharoah that works. Again, it must be emphasized that spraying makes pharoah ants worse . Little black ants most often forage inside structures from colonies located outside. Treatment along foundations, and around windows are helpful in preventing foraging ants from entering.
Pavement ants like to nest next to and under sidewalks and other types of slabs.
They often enter buildings through expansion joints in slabs. Application of insecticides through these cracks may help in controlling the colony beneath. In severe infestations, a slab floor may need to be drilled and treated by pumping chemical underneath with a specially equipped sprayer. Outside perimeter treatments are helpful in preventing reinfestation. Crazy ants are one of the most difficult ants to control in structures.