Description: This guideline will assist managers in the use of mathematics in area-wide Integrated Pest Management (AW-IPM) programmes using the Sterile Insect Technique (SIT). It describes mathematical tools that can be used at different stages of suppression/eradication programmes. It provides simple methods for calculating the various quantities of sterile insects required so that more realistic sterile: fertile rates to suppress pest populations can be achieved. On the other hand, most SIT programmes have information systems based on GIS that produces reliable profiles of historic information. Based on the results of past activities they describe what has happened in the last weeks but barely explain what is expected in the following weeks. With the help of this guideline current AW-IPM progammes can use that historic information to develop predictive models for their particular conditions to better plan control measures. (fao.org)