Exclusionary measures are the best treatment for pavements ants whose nests are located outdoors. Sealing all cracks and crevices with caulk will eliminate the entrances used by foragers, keeping them outside. A vigorous application of rubbing alcohol will also remove any remnants of the ant's pheromone trails, and further foraging can be discouraged by promptly storing or disposing of greasy and sweet foods.
Nests that are either inside the home or in other problematic locations can be treated using baiting systems. These pesticides should be used with care, away from children and pets; they deliver a slow acting poison to foraging ants, which when returned to the nest, spreads throughout the colony and will eventually exterminate all ants.
With Halloween just around the corner, its time for larger-than-life creepy, crawly creatures skittering across lawns, lurking in dark alleyways and dropping out of nowhere to frighten their hapless victims.