How social and citizen science help challenge the limits of the biosecurity approach: the case of ash dieback

Protecting tree and plant health remains a concern firmly embedded in the science-based, technocratic discourse of ‘biosecurity’ with its emphasis on regulation, surveillance, and control. Here, Judith Tsouvalis argues that this makes it difficult to have a broader debate on the deeper, more complex causes of the steep rise in tree and plant disease epidemics worldwide.