The management of risk is fundamental to biosecurity. Potential pest risks must be recognised early, with appropriate measures taken to prevent or reduce the potential damage a non-native species can cause. Risk registers are a recognised tool to support risk management, especially in project management or governance of corporate risk. The use of risk registers and risk prioritisation systems in the plant health biosecurity sphere has emerged in recent years driven by the recognition that resources to assess pest risks in detail are scarce, and biosecurity actions need to be targeted and prioritised. Individual national plant protection organisations have consequently developed a variety of tools that prioritise and rank plant pests, typically taking likelihood of pest entry, establishment, spread and impact into account. They use expert opinion to give scores to risk elements within a framework of multi-criteria decision analysis to rank pests based on the prioritisation aims of users. Knowing that biosecurity extends beyond national borders we recognise that such systems would add value to global efforts to detect and share information on emerging pests to better target actions against pests to protect plant biosecurity.

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