The course will provide users with a means to learn the basic principles and applications of fruit fly population sampling using trapping systems. It presents the different types of traps and lures and the species that respond to them. The strategic uses of trapping in area-wide fruit fly programmes are described including survey for detection, monitoring and delimitation. The different trap densities used depending on the programme objective (suppression, eradication, prevention) are presented. General procedures to deploy and operate a trapping network are also described.?? ??????