Research on Site Specific Weed Management (SSWM) started in the late 80's. Since that moment, considerable research has been conducted on different aspects of SSWM, from fundamental studies on the spatial ecology of weeds to the applied development and testing of new technologies for weed detection and site-specific control. Despite the relatively good knowledge available, there has been little practical uptake of these technologies. In this work we explore some of the reasons for this limited uptake.