A potato genetically modified to resist the fungus which caused the devastating Irish potato famine of 1845 has been developed by British scientists. Late blight, caused by the organism Phytophthora infestans, remains the potato farmer’s greatest enemy to this day. Each year UK farmers spend around £60 million keeping the infection at bay with pesticides. In a bad year, losses and control measures combined can account for half the total cost of growing potatoes. …