USA HISTORY

Detailed explanation-1: -The Irish potato famine, also known as the Great Famine, began in 1845 and continued until 1849. It occurred due to the failure of potato crops in successive years due to Phytophthora infestans, a water mould.

Detailed explanation-2: -Suddenly, in the mid-1840s, the size and nature of Irish immigration changed drastically. The potato blight which destroyed the staple of the Irish diet produced famine. Hundreds of thousands of peasants were driven from their cottages and forced to emigrate–most often to North America.

Detailed explanation-3: -The potato late blight pathogen was introduced to Europe in the 1840s and caused the devastating loss of a staple crop, resulting in the Irish potato famine and subsequent diaspora.

Detailed explanation-4: -In 1845 a strain of the water mold Phytophthora infestans, which causes late blight in potatoes (as well as tomato plants), arrived in Ireland accidentally from North America. When plants become infected with it, lesions appear on the leaves, petioles, and stems.

Detailed explanation-5: -Ireland’s peasants were dependent on potatoes, and it was a major part of their diet. People were so dependent on potatoes that hundreds of thousands died of starvation in the mid-1840s when disease destroyed the potato crop. This tragedy is known as the Great Famine or the Irish Potato Famine.