This project is funded by the innovation program of the Federal Ministry of Food and Agriculture (BMEL), funding agency is the Federal Office for Agriculture and Food (BLE) . This project aims at the development of a web-based interactive planning system as a comprehensive tool for crop management in cereals. The user is to be conducted by an intuitive decision support for all processes throughout the season from sowing to harvest. Using the example of winter wheat, existing decision support modules, warning services, monitoring results and background knowledge from literature are linked in such a way that decision making corresponds much better with the general principle of integrated plant protection. By this all relevant interdependencies can be provided for.