Phenological observations provide sensitive information to determine how plant species respond to regional climate conditions in order to produce fruits in different regions. The experiment was conducted from September 2010 to January 2011 with the aim of characterizing the growth stages of pear 'Housui' and 'Kousui', grown in semiarid climate of Northeast Brazil. The phenological data (phases) were collected in the orchard on daily observations from application of hydrogen cyanamide (to break dormancy) until the ripening fruits. It was concluded that in the semiarid climate pear 'Housui' and 'Kousui' they conclude their phenological cycles in 128 days and 115 days, respectively. New research and evaluation over several years will be needed to generate a system of production of pears in the semiarid northeast.
Pyrus communis L.; chilling requirement; flowering
