The primary purpose of exclusion in pest control is to

• A. Block entry points
• B. Attract natural enemies
• C. Apply chemical barriers
• D. Install traps

Answer: (A)

Exclusion in pest control is all about preventing pests from entering a structure by creating barriers at every possible entry point. The main idea is to block access before pests can establish themselves inside, which you do by sealing cracks and gaps around foundations and walls, weatherstripping doors and windows, installing door sweeps, screens on openings, and sealing utilities and vents. When entry points are closed off, pests have fewer chances to get inside, reducing infestation risk and making any other controls more effective while cutting down on the need for pesticides. This approach is distinct from strategies that target pests after they’re near or inside the building, such as using biological controls to attract natural enemies, applying chemical barriers, or installing traps.