Monoculture and lack of genetic diversity are related but not the same thing. If banana farms were mixed up with other varieties or species, the cloned Cavendis

Monoculture and lack of genetic diversity are related but not the same thing. If banana farms were mixed up with other varieties or species, the cloned Cavendish plants would still be at risk, because they have no genetic diversity, though the spread would be slowed somewhat. Even natural genetic diversity isn't a guarantee against disease. For example, the American chestnut, driven to the edge of extinction in its native range by an imported blight.