This paper was prepared as part of the Action on Invasives and Plantwise Plus programmes. Action on Invasives is supported by the UK Foreign, Commonwealth and Development Office (FCDO) and the Netherlands Directorate General for International Cooperation (DGIS). Plantwise Plus, in addition to FCDO and DGIS, is also funded by European Commission Directorate-General for International Cooperation and Development (DEVCO) and Swiss Agency for Development and Cooperation (SDC). We thank the survey respondents, including those whose partial responses have been quoted with their permission.CABI is an international intergovernmental organization, and we gratefully acknowledge the core financial support from our member countries (and lead agencies) including the United Kingdom (Foreign, Commonwealth and Development Office),