Pharaoh ants are a tropical ant species that need the warmth of heated buildings to survive in the UK. They are unable to survive outside. They are often found in boiler rooms and are particularly prevalent in high rise flats and offices. They can also be a real pest in hospitals where they are attracted by soiled dressings and bandages.
Baiting is the only control option. Poison baits in the form of grains or gel such as Biopren are laid along the food trail and the workers unwittingly take the poison back to the nest for the other ants to feed on. Baits are protein based, due to the pharaoh ants’ preference for foodstuffs like grease or fat, meat, dead insects, or items contaminated with body fluids such as dirty nappies and used bandages. Regular sugar based baits are unlikely to be effective against pharaoh ants