The March 17 Business article “Robb: Label GMO foods, and see what sells” about Whole Foods and genetically modified produce raises a question: How does one define a genetically modified organism (GMO)? My understanding is that if potato A is bred with potato B to produce potato C, no label is needed. But if that process is sped up in the laboratory, then potato C becomes a GMO. This seems an odd definition.

To my mind, the potato that is injected with some chemical to make it resistant to bugs or mold is the one that should be labeled.

Betty Stacey, McLean