I have a small garden and at one place I have a bunch of banana plant. In last three months we have harvested from two of those banana trees.
Recently, one of the tree had bore fruit, and fruits were looking quite healthy. Then suddenly, we saw fruits getting prematurely ripe and then getting bad. On further observation we saw that most of the soft leaves were rot. We removed the fruit so that we can consume them as vegetable before they get too bad.
All the trees near by showed similar symptoms on leaves.
When we cut the tree by half, the center part of the trunk was full of water and it had very bad smell.
I have cut most of large trees (all were infected), and left smaller ones in the hope that some how they shall survive.
The issue does not appear to be due to pest, we did not notice anything mobile, it may be either fungi or some bacteria.
Have you seen this issue, what could be the possible reason and how can I fix it. Is there any pesticide I can try.