How to set pitfall traps for spiders and predatory beetles

This video demonstrates a passive, non-selective method for monitoring ground-dwelling spiders and predatory beetles in greenhouses and fields using pitfall traps. Step-by-step instructions cover digging holes, positioning cups at soil level, adding preservative solution, and using plastic roofs to prevent evaporation and contamination. Traps are emptied every 14 days. The method supports biodiversity monitoring in agricultural and ecological research. Produced by GreenResilient, a project promoting organic farming resilience, the video is in English and part of an educational initiative for researchers and organic farmers.