Talk 1: State and evolution of plant health globally across Plant Systems and Ecoregions 

This presentation is the first talk of the keynote session K4 "Global Plant Health Assessment (GPHA)". The GPHA is an initiative conducted under the aegis of the ISPP undertaken to contribute to the International Year of Plant Health. The general philosophy and the steps taken by the GPHA will be described. The Plant Systems assessed in the different Ecoregions of the world will be mapped. The overall results pertaining to the assessment of plant health status and evolution over the last 10 years will be outlined. Specific results for a limited number of Plant Systems (rice, potato, peri-urban horticulture and household gardens, softwood forests, and oak forests) will be described in more detail, allowing to highlight key findings. These include: plant health as affected by climate change, pathogen invasions, and the issue of pesticide misuse.

Talk 2 : Impacts of plant health on services rendered by Plant Systems in Ecoregions 

This presentation is the second talk of the keynote session K4 "Global Plant Health Assessment (GPHA)". The overall results pertaining to the assessment of the impact of disease on ecosystem services (provisioning, regulating, and cultural) and its evolution over the last 10 years will be outlined. Specific results for a limited number of Plant Systems (rice, potato, peri-urban horticulture and household gardens, softwood forests, and oak forests) will be described in more detail, allowing to highlight key findings of the results. These include: the paucity of hard data on crop losses caused by plant pathogens worldwide; the impact of plant diseases on food security; pathogen invasions threatening food security and biodiversity; climate change impacts on crops and crop losses; the challenges of pesticide misuse; and the conservation of plant species that are endangered by diseases, especially in the case of forest species.

Talk 3 : Synthesis and implications of the findings from the GPHA

This presentation is the third talk of the keynote session K4 "Global Plant Health Assessment (GPHA)". This talk will first discuss the outcomes highlighted by the findings of the GPHA and its 26 reports for the [Plant System x Ecoregion] combinations that the project considered. This will be done with respect to the linkages between plant health and crop loss information, food security, biodiversity and conservation of species, climate change, pathogen invasions, and pesticide use and misuse. General insights gained from the GPHA initiative will then be highlighted. Links between the GPHA and the concept of One Health will be discussed. The notion of Ecosystem Services will be revisited and challenged. The talk will emphasise the fact that plant health is a common good, shared by all citizens across the world. The value of the GPHA specific design, as a collective action undertaken by a collective toward a common good, will be delineated. The GPHA recent as well as on-going activities, together with its outputs will be described. Perspectives will be offered, using the GPHA as an example of a collective action undertaken by a collective belonging to a Scientific Society toward common good.