Decision support systems (DSS) are an vital tool in advancing the integrated management of horticultural pests. Whether the DSS support strategic, tactical or operational decisions, they can enable growers and their advisors to make difficult choices based on the best information on potential risks to a crop. This chapter looks at the availability of DSS in horticulture, they typical inputs required and outputs provided to the user, and discuss their role in crop management. It provides case studies on the use of specific systems, and how online platforms are helping to standardise outputs to improve user experience.