About Potato Taste Defect

What is potate taste defect? Potato taste defect, or PTD, is a type of defect that’s only found in coffees from some East African nations, including Rwanda, Burundi, the Democratic Republic of the Congo and Uganda. Coffee beans with this defect give off a raw potato-like odor when they are ground or brewed. One of its causes is said to be certain insects that bite a hole in coffee cherries, creating a breeding ground for bacteria. Another culprit is believed to be pyrazine, a class of organic compounds that coffee trees generate when stimulated by insects. But no clear cause has been established. Differences from other defects PTD has two main differences from other defects. The first is difficulty in...