Answer: Based on your description of the problem I am not certain what is affecting your plant. I would suggest you work with your county extension to obtain a specific diagnosis and based on that, recommended controls. Maryland offers a service where you can send a sample to the pathology lab for a small fee. Here is the page with the link to the application form, it also includes a phone number to call first for consultation before you send it in.
Once you have a definite identification of the problem, they can help you figure out what to do about it. Good luck with your banana!
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