What is a common method used for monitoring pest populations?

Using traps is a widely accepted and effective method for monitoring pest populations. Traps allow pest control professionals and homeowners to accurately assess the presence and density of pests in a particular area. They can be designed to capture a variety of pests, such as insects and rodents, and may use various attractants to draw the pests in. By regularly checking these traps, individuals can gather data on pest activity, identify which species are present, and determine the extent of an infestation. This information is crucial for making informed decisions about control measures and for assessing the efficacy of any pest management strategies that are implemented.

In contrast, applying chemicals focuses on controlling or eliminating existing pest populations rather than monitoring them. Sealing entry points is a preventative measure that helps to stop pests from entering a home but it doesn't provide insights into existing populations. Replacing old furniture is an unrelated action that does not contribute to monitoring pest populations; it may even inadvertently disrupt monitoring efforts if pests are present in that furniture. Thus, using traps stands out clearly as the method dedicated to monitoring pest presence and activity.