DEPHY EXPE SToP Project: for the transition of current horticultural systems to agroecological systems without chemical uses in a tropical area

Graindorge Rachel, Delaunay J., Huat Joël, Lefèvre A., Marquier Marlène, Vanhuffel Luc. 2022. DEPHY EXPE SToP Project: for the transition of current horticultural systems to agroecological systems without chemical uses in a tropical area. In : Proceedings of International Symposium on Agroecology and System Approach for Sustainable and Resilient Horticultural Production. Dussi M.C. (ed.), Simon S. (ed.). ISHS. Louvain : ISHS, 91-98. (Acta Horticulturae, 1355) ISBN 978-94-62613-54-6 International Horticultural Congress (IHC 2022): International Symposium on Agroecology and System Approach for Sustainable and Resilient Horticultural Production. 31, Angers, France, 14 Août 2022/20 Août 2022.

https://doi.org/10.17660/ActaHortic.2022.1355.12

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Résumé : Horticultural systems in the various French overseas departments are often highly diversified but cultural interactions and complementarity with functional biodiversity are often little exploited. Thereby, they are more vulnerable to pest attacks and chemicals are required to protect crops. Implemented in a tropical environment, on Reunion Island, the ST0P project aims to make a shift from current crop production systems to agroecological systems that no longer use synthetic pesticides. Thus three multi-species cropping systems are being tested in CIRAD, EPL Forma'terra, and ARMEFLHOR sites. The design and composition of these cropping systems are the results of collective work with different stakeholders (growers, researchers, etc.). Crops and associations have been thought to activate ecosystem functions and services. The main measures for achieving zero pesticides are prophylaxis, plant diversification, insertion of agroecological infrastructures, innovative physical control methods, biological control with macroorganisms, and biopesticides. The association between agriculture and livestock with poultry paths arranged in the production area is evaluated in one experimental site. The performance is sought on different scales: economic, social, and environmental. Sharing and dissemination experiences are structural aspects of the project. After nearly two years, these agroecological systems have evolved in time and space. Economic balance is not completely obtained especially in sites where fruit production has been installed at the beginning of the project. On the social aspect, not using chemical pesticides is comfortable for growers, and production areas are pleasant to work in although growers had to broaden their scope of expertise to manage these diversified cropping systems with vegetable and fruit productions, and sometimes livestock integration. Observations and evaluations will continue for the remaining two years to best meet the needs and expectations of growers.

Mots-clés libres : Agroecology, Biodiversity, Biocontrol, Diversified cropping system, Performance assessment

Agences de financement européennes : European Commission, European Regional Development Fund, European Agricultural Fund for Rural Development

Agences de financement hors UE : Conseil Régional de La Réunion, Centre de Coopération Internationale en Recherche Agronomique pour le Développement

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