Which type of trap is NOT typically used for pest monitoring?

Gas traps are not typically used for pest monitoring. Pest monitoring often involves capturing or observing pests to assess their populations and behaviors. Sticky traps and mechanical traps are commonly used for this purpose, allowing for direct capture and counting of pest numbers. Sticky traps catch insects that land on their adhesive surfaces, while mechanical traps physically catch pests.

Food chemical traps, while less conventional, may attract pests using specific baits to monitor populations. However, gas traps, which release gases to control or repel pests, do not serve the purpose of monitoring pest activity. They are usually employed for pest management rather than monitoring, making them inappropriate for the context of tracking pest populations effectively.