How do physical barriers help in controlling pests?

Physical barriers are an effective method of pest control because they prevent pests from entering buildings or specific areas where they can cause damage or spread diseases. This technique involves using materials like nets, screens, and fences to create a physical obstruction that pests cannot bypass. By implementing these barriers, property owners can reduce the likelihood of pest infestations in vulnerable spaces, like gardens, homes, or storage areas.

For example, mesh screens on windows and doors can keep flying insects out, while row covers can protect crops from pests while still allowing sunlight and moisture in. This method is an essential part of Integrated Pest Management (IPM), which promotes sustainable practices by reducing reliance on chemical pesticides.

The other options, while they touch on aspects of pest management, do not accurately describe the role of physical barriers. Attracting pests away or providing food for beneficial insects does not directly involve preventing access, and killing pests on contact pertains more to chemical or lethal methods rather than physical deterrents.