Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Plant diseases have brought misery and suffering to human populations across the world and across millennia. Declaring 2020 the International Year of Plant Health will hopefully raise awareness of this ancient yet very modern threat.