Exclusion as a pest-control method primarily involves

• A. Killing existing pests
• B. Blocking entry points
• C. Biological release
• D. Pheromone traps

Answer: (B)

Blocking access points to a structure is the essence of exclusion in pest control. Exclusion focuses on preventing pests from entering by sealing and blocking their routes—think sealing cracks in foundations, installing or repairing door sweeps and screens, and closing gaps around pipes, vents, and utility entries. When entry routes are physically barred, pests can’t get inside to establish colonies or cause damage, so infestations are less likely to occur and the need for chemical treatments is reduced.

This approach is proactive rather than reactive. Killing pests that are already inside addresses the problem after it has started, but exclusion stops new pests from getting in in the first place. Biological release involves using natural enemies to control pests, which is a different strategy altogether. Pheromone traps are used for monitoring or capturing pests, not for preventing entry into a space.