%K Colloquium of Organic Researchers; COR; weed control, modelling, decision support; horticulture; tools; knowledge; computer modelling %D 2002 %X This report was presented at the UK Organic Research 2002 Conference. Weed control is an important yet mainly unaddressed research issue in organic systems. At present there is little agronomic support to underpin weed management decisions. Computer modelling and simulation techniques may provide a valuable tool for understanding the nature and processes of the organic system thus generating knowledge and information of direct benefit to growers, which will aid in short and long term weed management strategies. %E Jane Powell %E et al. %L orgprints8432 %A Andrea C Grundy %A Rebecca J Turner %J Proceedings of the UK Organic Research 2002 Conference %T Horticultural weed control in organic systems – a modelling approach %P 295-298 %I Organic Centre Wales, Institute of Rural Studies, University of Wales Aberystwyth