Uneven Ripening
This condition is thought to develop when high temperatures occur during the fruit ripening stage affecting the enzymes that cause normal pigmentation in ripe fruit. Fruit which are exposed to high temperatures earlier in their development are not as susceptible as fruit exposed to cool temperatures early on.
The variety Cavendish is especially susceptible to this condition, where white shoulders and blotches occur on otherwise ripe fruit. Although fruit is ripe and sweet, colour does not develop on certain areas of the fruit.