Cutting the stems of banana instead of wrapping them when preserving them

I am searching for a ways to preserve the banana, and most of the time they said that I need to wrap the stems in a plastic or scotch tape so the gas wont come, they said that this gas is the reason why banana ripens fast.

I am thinking that maybe by separating each bananas then cutting the stem of each one of them instead of wrapping them will effectively preserve the bananas? It is very time consuming to wrap each one of the stem.