Cause Of Great Potato Famine revealed/More than 1 million died between 1845-1854 causing 1 million to emigrate & fueling tension between Irish Catholics & Protestants. Now DNA sequencing of dried leafs of the "Irish lumper" potato, the genome of the organism causing the blight has been found to be a single strain of a fungus like pathogen Phytophthora infestus. May 24, 2013
Did the Irish Famine trigger mental illness in future generations of Irish? Irish historian Oonagh Walsh believes that the Great Hunger triggered a higher rate of mental illness among later generations, including both those who stayed in Ireland and those who emigrated.
Severity of the Famine in 1847. Farmers in the east depended on cereal crops, those in Ulster grew flax, only small farms of west and partts of Munter potatoe in a monopolistic position. 30% of Irish wholly dependant on potatoes for food.