Integrated pest management (IPM) and the promotion of low pesticide-input management are major actions for sustainable agriculture promoted by the EU. European meteorological networks, working at different spatial scales, are currently handling their own data with unconnected management system. This makes the access to data difficult, which is an essential prerequisite for any implementation process of information on climate and pests. We propose a set of modular applications adopting FIWARE technologies to develop Decision Support System (DSS) in support of area-wide IPM. The system will be based on free agrometeorological data from public and private providers in Italy, Spain and Greece. Insect phenology will be modelled, and interfaced with monitoring programs and geostatistical algorithms. Four major crops will be targeted: corn, tomato, grapevine and olive. A specific focus on pest development, agrometeorological modelling, and environmental safety will be pursued IPM applications on arable farming (corn), and horticultural crops (tomato, grape and olive). Open access agrometeorological data will be implemented in a model environment for the sustainable management of the most important pests for these crops. The main benefits are the optimization of spatio-temporal IPM applications and the flexible use of farm-specific information modules. The open system platform will provide the data in real time, as required by large companies and/or consortia and cooperatives that offer services for large territorial scale and long-term purposes. The use of FIWARE and FI-space will ensure networking and reciprocal integration of results by groups of end users and ICT developers. The in-kind contribution of Regional Phytosanitary Service of Tuscany and DuPont Evalio AgroSystems, a public local authority and a multinational enterprise, working on pest management and food processor, respectively, will provide test bed to trial the results of mathematical models and DSS.