How can mechanical pest management methods be best described?

Mechanical pest management methods refer to strategies that use physical means to control pest populations without relying on chemical products. This approach includes the implementation of physical barriers, such as nets or screens that prevent pests from accessing crops, and traps designed to capture or kill pests. These methods help reduce pest numbers while minimizing harm to the environment and non-target organisms.

This choice accurately encompasses the key elements of mechanical pest management, emphasizing the use of tangible tools and devices rather than relying on pesticides. Other options suggest either exclusively chemical approaches, alterations to crop methods that could imply chemical interventions, or regulatory actions that do not involve direct pest management tactics. Therefore, focusing on physical barriers and traps is the most appropriate description of mechanical pest management.