What is the mechanical control method used for sealing small openings in buildings?

The mechanical control method referred to in this question is exclusion, which is a crucial strategy in pest management. Exclusion involves using physical barriers to block pests from entering buildings or specific areas. This can include sealing cracks, gaps, and other small openings in the structure, effectively preventing pests from gaining access to the interior.

Exclusion is an essential component of Integrated Pest Management (IPM) practices, as it helps maintain a pest-free environment without relying solely on chemical treatments. By addressing entry points, buildings can reduce potential infestations and protect indoor spaces from pests that might otherwise thrive if given an opportunity to enter.

The other methods listed do not directly pertain to sealing openings in the way exclusion does. Cultivation is primarily related to agricultural practices, while mulching is used for landscaping and soil health improvement. Trapping can capture pests already inside, but it does not prevent entry. Thus, exclusion stands out as the most relevant method for sealing small openings in buildings.