Historic Role of Wheat and the Threat of Stem Rust

Wheat has been a staple food source since earliest agriculture. Today it provides as... More

Wheat has been a staple food source since earliest agriculture. Today it provides as much as a third of the world's caloric intake. However,it has always been threatened by "the most devastating plant disease known to man" - stem rust, a fungus that can wipe out entire fields.

AIR DATE 7/6/17