Mechanical control methods often include which of the following?

Mechanical control methods primarily involve physical tactics to manage pests without the use of chemicals or biological agents. Using traps is a fundamental aspect of mechanical control, as it directly addresses pest populations by capturing or killing them physically. Traps can be designed to catch specific pests, minimizing harm to non-target organisms and the environment. This method is straightforward, often allowing for immediate tracking of pest numbers and effectiveness.

The other methods listed involve different strategies. Using chemicals relates to chemical control, which relies on pesticides and other substances to eliminate pests. Changing environmental conditions might improve the habitat for beneficial organisms or deter pest populations, but it does not involve a direct physical means of controlling pests. Applying biological agents pertains to biological control, which utilizes natural predators or pathogens to reduce pest populations. Each of these approaches serves a distinct purpose in pest management, with mechanical control standing out for its direct and hands-on nature.