Presentation by Nathalie Colbach describing the FLORSYS model and how it is used to model the interactions and relative impacts on weed flora when using a range of example intercrops, delivered as part of the Winter School hosted by Wageningen University between 11-15 January 2021 and linked to the ReMIX postgraduate course “Role of species mixtures in controlling diseases, pests and weeds and alleviating associated yield reductions, conferring resilience to stresses and improving ecosystem service provision”