 By the 1960s, the exporters of Gros Michel bananas were unable to keep trading such a susceptible cultivar, and started growing resistant cultivars belonging to the Cavendish subgroup (another "Musa acuminata" AAA).There are efforts to use genetic modification to create a version of the Gros Michel which is resistant to Panama disease.There have also been successful hybrids of Cavendish and Gros Michel that display a resistance to Panama disease.