potato blight

noun
  1. a devastating disease of potatoes produced by the oomycete Phytophthora infestans and the cause of the Irish potato famine of the mid-19th century
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for potato blight

Historical Examples of potato blight