Final answer:
The most common and effective formulation to control roaches is baits. Baits are safer and target roaches more effectively by using an attractive food-based substance laced with insecticide, leading to the direct and secondary poisoning of the roach population.
Step-by-step explanation:
The most common formulation to control roaches is baits. Baits are typically used because they are considered more effective and safer around the home compared to other methods. They work by attracting roaches with a food-based substance that is laced with an insecticide. Once the roaches consume the bait, the insecticide works to kill them either directly or through secondary poisoning as other roaches feed on the poisoned ones.
Other methods such as aerosol sprays, foggers, and liquids are also available, but they may not be as popular or effective as baits for long-term control. Aerosol sprays and liquids provide immediate knockdown, but they generally only kill on contact and may not reach into the roaches' hiding places. Foggers can reach more areas, but they can be less precise and require vacating the area for a period of time.