Get Instant Summarized Text (Gist) The Irish potato famine pathogen, Phytophthora infestans, is traced back to the Andes Mountains in South America, not Mexico. Genetic analysis reveals that P ...

However, the famine worsened when the potato harvest failed again in 1846 due to the potato blight. The British government did try and help a little. In 1846, Prime Minister Robert Peel ordered £ ...