That is, the boxes should be offset to allow the air to circulate among all the boxes. Bananas are very sensitive to temperatures. Chilling will occur if the fruit is subject to temperatures below 56 F. for several hours. It causes the peel to have a smoky, dull gray appearance. This may not show up for 18 to 24 hours after chilling occurs.
Cooked bananas result from excessively high temperatures.
The peel will have a brown to orange appearance. The fruit may be soft and have a short shelf life. Maintain proper humidity levels. If the humidity is too low, wetting the floor of the room with water is often helpful. Apply ethylene for a minimum of 24 hours during the initial phase of the ripening cycle.