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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

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The CoSAC project is structured into four main scientific tasks.
  • Task 1 will focus on crop diversification, localized technologies and no till. These techniques will be monitored in field experiments, the underlying processes will be studied in controlled conditions and in fields.
  • Task 2 will use these results to improve the existing FLORSYS model which quantifies the effects of cropping system and pedoclimate on weed dynamics and calculates indicators of weed harmfulness and benefits. FLORSYS will be further improved by adding herbicide resistance and seed dispersal functions, by upscaling from the field to a multi-field mosaic. FLORSYS will be used to run sensitivity analyses to identify correlations between cultural techniques and weed species traits. These simulations will also be used to develop a decision-aid tool for evaluating cropping systems in terms of weed harmfulness and benefits, after questioning future users to identify pertinent evaluation criteria and model uses. If possible, we will develop a further tool that propose cropping systems answering to the user's objectives.
  • Task 3 will use FLORSYS and its tool progeny to evaluate existing cropping systems identified in past farm surveys, existing farm networks and cropping system trials. New cropping systems reconciling reduced herbicide use, agricultural production and biodiversity conservation will be designed by experts, and evaluated with FLORSYS and its progeny. Existing and prospective cropping systems will then be improved in a second loop based on their simulated performance Then, the sensitivity of the best strategies to different changes will be tested. To take account of farmers' objectives and constraints during cropping system design, farmer interviews will be organized to identify obstacles that hinder the adoption of technical innovations.
  • Task 4 will organize the publication and dissemination of the project results, via meetings, website, training sessions on the newly developed tools and weed management strategies for advisors and farmers.