Back to profile Projects - dr.ir. WAH (Walter) Rossing Projects by WAH Rossing HortEco (NWO) The HortEco programme recognizes that development of ecologically and socio-economically sustainable food systems is highly important for balanced... PURE - Pesticide Use-and-risk Reduction in European farming systems with Integrated Pest Management Designing and testing integrated pest management (IPM) solutions to reduce the reliance of the main European farming systems on pesticides.