What is one method used to monitor insect populations in pest management?

Implementing sticky traps is a widely used method for monitoring insect populations in pest management. These traps are designed to capture insects that are drawn to their color, scent, or other attractants. By analyzing the number and types of insects captured, pest managers can gauge the population levels of specific pest species, identify infestation trends, and assess the effectiveness of control measures. This real-time data is crucial for making informed decisions regarding pest management strategies.

The other methods mentioned serve different purposes in pest management. Utilizing chemical repellents is aimed at preventing pests from approaching crops rather than monitoring their populations. Increasing plant diversity can help in promoting a balanced ecosystem and may deter some pests but does not provide direct monitoring of insect populations. Applying fertilizers is focused on enhancing plant growth and health, which can indirectly affect pest prevalence but does not offer a method for tracking insect populations.