Nice editing job, but I notice that you removed the paragraph explaining that  'Cavendish' only makes up about 10% of world production, and that its 'extinction' would only affect world trade, not production for local consumption. Any particular reason? Assuming it's true, I think that this fact contributes a lot to the 'extinction' discussion, and would be worth reinstating. (Overall, the combination of the facts that bananas are such a huge crop and staple starch for so many people, and the fact that the viability of a leading variety is under threat, is quite alarming until you understand that the 'extinction' panic only relates to the export trade.)