One of the key objectives of NOVATERRA is to develop a DSS for managing pests and diseases. Within Work Package 3 of NOVATERRA a new DSS has been developed for peacock spot in olive groves, and for powdery and downy mildew in vineyards. Typically, a DSS aims at providing crop managers with fast, organised and comprehensive information for making well-informed decisions. Based on data collected from weather station networks, the DSS analyses large sets of data and proposes the best possible actions to prevent and tackle crop infections.