Sticky Traps and Sensor Cards are useful in killing and identifying pests in the grow room. 

Traps

Insect traps and sticky monitoring cards provide a means of both capturing and identifying pests in and around your plants. The traps are made to attract a variety of insect pests, sometimes specifically while others are more broadly targetting things like flying insects in general. Ideal for enclosed indoor grow spaces, these sticky traps capture and allow for the easy identification of insect pests before they become an issue for your plants.

Yellow and blue are the most common colors as they both attract certain insects making it even easier to identify what pests are around your plants as a preventative measure before the need to use more harmful pesticides arises. Active traps use lures of some kind often attracting/targetting specific pests, while passive traps do not use a lure to capture and kill even the most stubborn of pests.