Blight-resistant potatoes are a type of potato that has been genetically modified or selectively bred to resist diseases caused by pathogens like Phytophthora infestans, which causes late blight. This disease can lead to significant crop losses and has historically caused famine, such as the Irish Potato Famine in the 19th century. These potatoes are designed to thrive in conditions where traditional varieties might fail, helping to ensure a more stable food supply. By reducing the need for chemical fungicides, blight-resistant potatoes can also be more environmentally friendly, promoting sustainable agricultural practices.