Source: Agricultural Research Service

Agricultural Research Service scientists are coordinating a unique program to develop new potato lines that resist different biotypes of late blight.

They send 2,500 breeding "clones" annually to Hector Lozoya-Saldana, a collaborator in Chapingo, Mexico, where late blight is endemic. Defender, a 2006 release from the program, has helped growers save on fungicides and other expenses associated with controlling late blight, which attacks the crop's leaves and tubers, rendering the latter unmarketable.

Original press release