Nicolas, there is Black Sigatoka is in FL. What is known about it in terms of, well, can it stand cool or cold temperatures? As in, if it was to make its way to SE Louisiana what do you - or anyone - think would or could happen? There are a lot of banana plants in SE Louisiana, most of them just as part of the landscape but I know some people who grow them for the fruit as well.
Found this, which is interesting:
APSnet Feature - Black Sigatoka of Banana - Disease Note