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Une démarche de co-conception d’innovations du système de culture au système agri-alimentaire pour une gestion agroécologique des bioagresseurs telluriques en maraîchage provençal

Abstract : A rapid and far-reaching change towards farming practices that contribute to the protection of the environment and the human health is needed. In many cases, these alternative practices exist but are not implemented due to interconnected barriers at the plot, farm, territory, value chain and/or global level. In my thesis, I developed a methodology taking into account the determinants of the farming practice choices at the different levels to support the change in farming practices. I applied this methodology to a specific case study: the management of soil-borne pests and diseases, mainly root-knot nematodes, in sheltered vegetable farming systems in Provence (France). The impact of root-knot nematodes on vegetable crops is significant both in Provence (40% of farms affected) and worldwide. Their management is essentially based on the use of non-selective nematicides that are damaging for the human health and the environment.First, I carried out a sociotechnical analysis showing that most of the Provençal agri-food system was locked around the use of "radical soil disinfection" techniques, thus excluding the implementation of alternative agroecological techniques. This lock-in arose from interconnected barriers to the change in practices, involving a diversity of stakeholders at the Provençal level and beyond it: farmers, upstream and downstream of the sector (including consumers), R&D and public policy actors. Following this analysis, I studied existing coupled innovations that foster the implementation of agroecological crop protection in French vegetable systems. This “tracking of innovations” led us to identify 5 types of coupled innovations, and for each of them, the combinations of sociotechnical levers mobilized and the way they were implemented. Meanwhile, I developed a serious game enabling the effective sharing of the sociotechnical analysis results to the stakeholders of the studied problem. This serious game also enabled to facilitate stakeholders’ knowledge management and creativity and the collaboration between them, for initiating the design of innovative solutions tailored for the problem under study. Finally, I mobilized the previous works (analysis, tracking, serious game) in 4 co-design workshops conducted with the stakeholders. I created and implemented several methods in these workshops to design increasingly elaborate solutions that favor change in practices. As a result, we collectively designed 50 coupled innovations including 41 coupled innovations, thus opening up the space of possible solutions. We evaluated part of the complex coupled innovations.In the discussion, I point out the promising avenues of action and research to facilitate the implementation of agroecological practices for the management of soil-borne pests and diseases in Provençal sheltered vegetable farming systems. I discuss the possible evolution of the methodology I developed during this thesis, in order to improve its efficiency and complete the design process. I make proposals to specify the conditions of the implementation of the innovations designed, evaluate them and anchor them in the territorial agri-food system. Finally, I show that this work contributes to establishing theoretical and methodological bases to multi-level redesign of agricultural systems for accompanying changes in farming practices.Parts A "Problem" and C "Discussion" of my thesis are written in French. Part B consists of three articles and one chapter of the thesis written in English.
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Contributor : Abes Star :  Contact
Submitted on : Wednesday, April 28, 2021 - 11:19:10 AM
Last modification on : Friday, January 7, 2022 - 12:26:33 PM
Long-term archiving on: : Thursday, July 29, 2021 - 6:32:10 PM


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  • HAL Id : tel-03210879, version 1



Yann Boulestreau. Une démarche de co-conception d’innovations du système de culture au système agri-alimentaire pour une gestion agroécologique des bioagresseurs telluriques en maraîchage provençal. Sciences agricoles. Université d'Avignon, 2021. Français. ⟨NNT : 2021AVIG0725⟩. ⟨tel-03210879⟩



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