Which of the following is an example of mechanical control in pest management?

Mechanical control in pest management refers to methods that physically remove or exclude pests without the use of chemicals. Setting traps is a prime example of mechanical control because it involves physically capturing or killing pests, making it an effective non-chemical method to reduce pest populations. This strategy can be very direct and effective for specific pest issues, such as rodents or insects, as it targets the pest directly.

Other methods listed, such as using pesticides and organic sprays, involve chemical means, which do not fit the definition of mechanical control. Crop rotation, while a cultural control method that can help in managing pest populations, does not involve physical removal or trapping of the pests.