Contribution des aménagements agroécologiques à la régulation des ravageurs en cultures maraîchères sous abri : Projet DEPHY COSYNUS 2019-2024

After an initial diagnosis, preventive agro-ecological infrastructures (flower strips, banker plants, cereal strips, hedges…) were implemented on three sites, on a farm-wide scale. Active transfers of natural enemies between agro-ecological infrastructures and crops were also realized. Spontaneous flora was managed to optimize the presence of natural enemies. The combination of the different pest management levers (functional biodiversity, biological control, prophylaxis, phytosanitary treatments) was studied, using decision rules. The objectives were achieved on the three experimental sites: commercial yields were maintained, net margin on the organic farm was improved (fewer natural enemies purchased), and Treatment Frequency Index for pests on the conventional sites was significantly reduced.