Unprecedented extinction of tree species by fungal disease

Myrtle rust is caused by the fungus Austropuccinia psidii and impacts some species in extremely large mostly Gondwanic plant family, Myrtaceae. Given location of its wild relatives, fungal pathogen originated South America spread rapidly across Pacific. Here we report on extensive surveys from Australian rainforest to predict a extinction event unprecedented magnitude. The results imminent 16 tree due myrtle within generation. A further 20 may be at risk, but monitoring required determine their fate. retards growth precludes reproduction these severely affected species. To avoid total extinction, strategies for in-situ ex-situ rescue are presented.