Taken from the CSU Cooperative Extension Office publication
LA 7588 (which is not available online, unfortunately)
At the orchard, pears are harvested at a point when the
fruit sugar development is such that slow ripening will take place in proper
storage. Visually, the fruit looks green and is hard to the touch.
The
fruit is cooled immediately and kept in cold storage 15 to 30 days.
Ripening
will occur at 60-70 F and relative humidity of 80-85%. At temperatures higher
than 70F, ripening does not develop the best flavor and texture.
A
mealy texture is attributed to higher than desirable ripening temperatures.
Fully
ripe pears should be refrigerated until they are used and will hold for about
one week.