Panama disease the Cavendish was then thought to be immune, but was immune only to the strain of the fungus that destroyed the Gros Michel. The version that annihilated the Gros Michel was found in only the Western Hemisphere, but the version found in Malaysian soil was different, and the Cavendish is susceptible to it. It killed and spread faster, inspiring more panic than its earlier counterpart in Panama. The newly discovered strain of "F. oxysporum" was named "tropical race 4 (TR4)". The resulting worldwide collapse in the banana trade is said to have inspired the song "Yes! We Have No Bananas".
Plant disease resistance viable geographic range of pathogen species and cause some diseases to become a problem in areas where the disease was previously less important. These factors make modern agriculture more prone to disease epidemics. Common solutions include constant breeding for disease resistance, use of pesticides, use of border inspections and plant import restrictions, maintenance of significant genetic diversity within the crop gene pool (see crop diversity), and constant surveillance to accelerate initiation of appropriate responses. Some pathogen species have much greater capacity to overcome plant disease resistance than others, often because of their ability to evolve rapidly and to disperse broadly.