The ‘one health’ concept has largely been defined around zoonotic diseases and the sharing of infrastructure and capacities of human and animal health systems. Veterinary public health is an essential part of public health and includes various types of co-operation between the sectors and disciplines that link the health triad, people-animals-environment. Yet agriculture is missing in the equation. Many human and animal health problems are caused or worsened by hunger, malnutrition and poor quality of food and feed. Looking beyond the zoonoses, it is clear that human and animal health are closely connected to plant health for at least four reasons: Food security – enough food at the right time to feed people; Food safety – plant products free from mycotoxins, pesticide residues and human disease contaminants; Feed security – enough feed at the right time to feed animals; and Livelihoods – agriculture is the world’s most important enterprise and is fundamental for economic growth in developing countries. Agriculture means crops. Plant health is essential if the crop yields are to be sufficient and of the right quality.