When these bees are supplied to farmers for pollinating crops, they are usually supplied in a dormant state called pre-pupa, and kept in such state by a constant temperature of about 7 °C(44.6 °F). At a time that is appropriate for the crop's flowers, the farmer puts the pre-pupal form in an incubating environment, a constant temperature of about 27 °C(80.6 °F) The adult bees emerge from the pupal form after about 25 days at that temperature. Then, the farmer brings the bees to the field.