The problems posed by agrochemicals for Crop Protection are now well-known, more frequent and more severe, e.g. soil, water and air pollution, hazards to human health, loss in biodiversity, etc. There is a need to move from this chemical-based approach to sustainable pest-prevention practices. Agroecological Crop Protection was developed to respond to this challenge. It is at the crossroad of Agroecology and Crop Protection and uses agroecological and spatio-temporal management of plant and animal communities at extended scales. It uses the services offered by functional biodiversity above and below soil.