This project was undertaken to develop a Threat Specific Contingency Plan for the Zebra chip complex. This plan will assist the potato industry prepare for an incursion of the Zebra chip complex by providing background information on the biology and available control measures for the Zebra chip pathogens (Candidatus Liberibacter solanacearum; syn. Ca. L. psyllaurous) and its psyllid vector (Bactericera cockerelli), both of which collectively make up the Zebra chip complex.