Reducing pesticide use is one of the high-priority targets in the quest for a sustainable agriculture. Until now, most studies dealing with pesticide use reduction have compared a limited number of experimental prototypes. Here we assessed the sustainability of 48 arable cropping systems from two major agricultural regions of France, including conventional, integrated and organic systems, with a wide range of pesticide use intensities and management (crop rotation, soil tillage, cultivars, fertilization, etc.). We assessed cropping system sustainability using a set of economic, environmental and social indicators. We failed to detect any positive correlation between pesticide use intensity and both productivity (when organic farms were excluded) and profitability. In addition, there was no relationship between pesticide use and workload. We found that crop rotation diversity was higher in cropping systems with low pesticide use, which would support the important role of crop rotation diversity in integrated and organic strategies. In comparison to conventional systems, integrated strategies showed a decrease in the use of both pesticides and nitrogen fertilizers, they consumed less energy and were frequently more energy efficient. Integrated systems therefore appeared as the best compromise in sustainability trade-offs. Our results could be used to re-design current cropping systems, by promoting diversified crop rotations and the combination of a wide range of available techniques contributing to pest management.

Over the last few years, an increasing number of agricultural R&D actors have sought to discover and get to know farmers' practices that they consider as innovative, unconventional, or promising. We refer to these approaches, all of which aim to support the design of farming systems, as 'farmer innovation tracking'. There is still a lack of knowledge, however, about the specificities of the approaches adopted to track innovations and how they contribute to design processes. To explore these questions, we studied 14 initiatives in France led by actors from different R&D networks. We analysed the data collected using agronomy and design science concepts. Three outcomes emerge from this work.(1) We shed light on the common features of innovation tracking. We outline five stages that structure all the approaches: formulating an innovation tracking project, unearthing innovations, learning about them, analysing them, and generating agronomic content. (2) We characterize six contributions of farmer innovation tracking to design processes: giving rise to creative anomalies, shedding light on systemic mechanisms to fuel design processes on other farms, uncovering research questions, stimulating design in orphan fields of innovation, circulating innovation concepts, and connecting farmer-designers with each other. (3) Finally, we highlight three tracking strategies: the targeted tracking of proven practices, the targeted tracking of innovations under development, and the exploratory tracking of proven practices. This article is the first to propose a theorization of the farmer innovation tracking approaches, thus enriching the agronomic foundations supporting farming system design. The purpose of our paper is not to provide a turnkey method, but to highlight concepts, mechanisms, and points of reference for actors who might wish to develop farmer innovation tracking in different contexts in the future. By revealing their contributions to design processes, this article seeks to contribute to the institutionalization of innovation tracking.

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« moins de phytos c'est mieux », ou plus globalement « produisons autrement », entraîne une transformation de l'activité des conseillers en grande culture des L e changement attendu des pratiques des agriculteurs, qui s'exprime aujourd'hui dans l'orientation prise par les pouvoirs publics dans des « slogans » comme, Développer la capacité des conseillers à agir face à la diversité des situations de conseil en grande culture