Originally Posted by Gabe15

I put your photo in your post for you. When you view the photo in the gallery, you copy the text in the box directly below it labeled "Code for bulletin boards", and paste that text into thread to make it show.

There is almost no way you could have Banana Bunchy Top Virus is Michigan, so don't worry about that.

What is looks like is a combination of being root bound and a build up of salts in the soil (which is related) and often causes a "pseudo-bunchy top virus" type effect. If you are using chemical fertilizers like Miracle-Gro or Scotts, a good amount of water should be run through the container regularly to wash away the salts that build up and cause this symptom. Additionally, this happens more frequently in smaller containers, and so repotting to a larger pot would also help. A good mix for potted bananas is 1/3 perlite, 1/3 soil-less potting mix (you can use soil but it can get very heavy and difficult to move the pots around) and 1/3 compost. The compost directly in the mix really minimizes the need for additional fertilizers when growing in containers, and easily avoids the problem of salt build up.