- 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
The direct effects of the potato-blight of 1845 were not so serious as had been expected.
Botany and chemistry being powerless to stay the effects of the potato-blight, the appeal was next to economics.
The forecast of Malthus was repeated in his own way by Cobbett, although neither of them foresaw the potato-blight as the means.