Explain the term "exclusion" in the context of rodent control.

In the context of rodent control, "exclusion" specifically refers to the method of sealing entry points to prevent rodents from accessing buildings. This strategy is critical because rodents are adept at finding small openings to enter structures; even a gap as small as a quarter-inch can serve as an entry point for mice or rats. By effectively sealing these potential access points, property owners can significantly reduce the risk of rodent infestations.

Exclusion is an essential component of integrated pest management (IPM) because it focuses on preventing the problem from occurring in the first place. This proactive approach is often more effective and sustainable than reactive measures, such as trapping or poisoning, which only address the symptoms of an infestation without tackling the root cause.

In contrast, eliminating food sources, although beneficial, does not stop rodents from entering once they are already present. Trapping is a method of handling existing infestations rather than preventing them. Encouraging natural predators can be helpful in managing rodent populations over time but does not directly inhibit entry into buildings. Therefore, sealing entry points is the most direct and efficient approach to achieve rodent control through exclusion.