Production under OA certification often entails additional costs, particularly in terms of yield variability. These additional costs can be partly offset by an increase in consumers' willingness-to-pay (WTP).

Within OA, biodynamics and syntropy have generated a certain amount of interest in the field, either via adherence or as a source of inspiration, but have been little studied.

Food products authentication as organic is a major challenge given the increasing incidence of fraud. However, determining whether a product is organic is not easy since it is not always possible to spot potential inputs that are not authorized for organic agriculture (e.g., products that are difficult to detect or confined to certain parts of the plant).

Organic agriculture (OA) is limited by the availability of nutrient resources essential for plant growth.

To accelerate the transition toward sustainable agri-food systems, the Egalim law requires that collective catering purchases at least 50% of sustainable products, including at least 20% of organic products. To meet these targets, canteens and stakeholders in the food sector have had to and will have to innovate together.

Accelerating the agroecological transition requires greater commitment from farmers and consumers alike. Stimulating the contribution of farmers raises the question of the incentives to be put in place, while taking account of structural constraints (budget management, climate change, consumer tastes, etc.).

The transition to more numerous and more efficient organic pig farms requires the development of alternatives that do not use syn-thetic hormones for the synchronization of estrus to facilitate gilt batch management. The objective is to test two natural substitutes for syn-thetic progestagens used for cycle synchronization: the fruit of the chaste tree and walnut leaves. The hypothesis is that the incorporation of phytoprogestagens in the feed ration would extend the luteal phase of gilts and that its cessation would induce a resumption of fol-licular growth and a synchronization of estrus.

Within the context of major climatic uncertainties, the sustainable mobilization of feed resources for animals on ruminant farms is questioned in terms of quantity and quality. The use of new plant re-sources may prove to be one of the alternatives for sufficient and sustainable production in the future. The SourceN project explores the extent to which atypical resources from the natural capital of ruminant farms can be mobilized in terms of fodder supplementation and animal "health value" without compromising their sustainability and their role as habitats for biodiversity.

Changes in scale of OA in terms of beekeeping still face many challenges: availability of organic food resources, control of biological pests (including Varroa), organic genetic beekeeping resources, etc. Genetic improvement is one of the levers used to address these challenges. It is important to determine how to select honeybees to meet the expectations of organic beekeepers and to evaluate the relevance of selection strategies specifically devoted to organic farming.

Whereas certain organic plant crops are in full expansion, organic animal production is struggling to develop in France’s overseas departments and regions (DROM).