Which method is effective for monitoring pest populations?

Using traps and visual inspections is an effective method for monitoring pest populations because these techniques provide direct insight into the presence and level of pest activity in an area. Trapping allows for the capture of specific pests, which can be identified and quantified, giving a clear picture of the population dynamics. Additionally, visual inspections help in identifying signs of infestation, such as damage to plants or the presence of pests themselves. Together, these methods offer a proactive approach to pest management, allowing pest control professionals to make informed decisions based on real-time data, thus enhancing the effectiveness of any subsequent pest management strategies.