In this video, agronomists demonstrate best practices for quality checking a variety of predatory insects and mites that can be done in a commercial greenhouse with limited materials. The video also covers how to scout for different predatory insect life stages in your crop to check whether the biocontrol program is establishing, and how to distinguish between predator and prey mites when counting predatory mite products that are shipped with feeder mites. The predators covered in this video include mites, Aphidoletes, Orius and other immature predators.