What is a common practice for rodent control in buildings?

Sealing entry points to prevent access is a fundamental practice for rodent control in buildings. Rodents are adept at finding small openings to gain entry, so identifying and sealing these points can significantly reduce the likelihood of infestations. Common access points include gaps around doors, windows, vents, and utility lines. By effectively blocking these entryways, buildings can maintain a pest-free environment, minimizing the risk of not only rodents but also other pests that might find similar access routes.

The other options, while potentially useful in specific contexts, do not serve as primary measures for long-term rodent control within buildings. Ultrasonic repellents, for instance, lack consistent scientific support regarding their effectiveness and may not provide a reliable solution. Outdoor bait stations are typically used for controlling rodent populations outside rather than preventing entry into structures. Regularly spraying insecticide is more suited for insect management rather than addressing rodents, as insecticides do not target rodents directly and may not offer a complete solution. Thus, sealing entry points stands out as the most critical and preventive approach for rodent control.