Abstract
This chapter undertakes a selective review of published work on insect pest monitoring using sex pheromone and light traps, and forecasting using pest simulation models and decision support systems. The use of remote sensing for pest monitoring and forecasting is described. Pest monitoring is the foundation for the issue of early warnings, development validation of pest forecast models and decision support systems, which are crucial for the design and implementation of successful integrated pest management programmes. In developing countries, there is a strong need to establish agro-meteorological networks for specific crop sectors with the major objective of pest forecasting through models and decision support systems.