The fungus Fusarium Odoratissimum, or Tropical Race 4 (TR4), has been spreading through banana plantations in Southeast Asia, Africa, and now in Colombia. This is a major concern for the banana industry as the Cavendish banana, which represents 99% of world exports, is highly susceptible to TR4. Efforts are being made by companies like Dole and Chiquita, as well as scientists, to find ways to increase the resistance of the Cavendish and protect the banana industry from the threat of extinction.