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But in the Irish famine of the late 1840s, successive blasts of potato blight - or to give it its proper name, the fungus Phytophthora infestans - robbed more than one-third of the population of their usual means of subsistence for four or five years in a row.
Potato late blight, caused by Phytophthora infestans. Potato late blight is one of the most devastating plant diseases. The epidemics that destroyed potato crops in Europe in the 1840s led to mass starvation.For example, in the Great Irish Famine of 1845 to 1847, up to one million people died and a similar number of people emigrated to the rest of Europe and the USA.ext and links may be out of date. The Microbial World: Potato blight-Phytophthora infestansProduced by Jim Deacon Institute of Cell and Molecular Biology, The University of Edinburgh Potato late blight, caused by Phytophthora infestans Potato late blight is one of the most devastating plant diseases.