PHENOLOGICAL STAGES OF PEARS GRAFTED ON QUINCE ‘CP’ ROOTSTOCK IN BRAZIL

Despite of the increased consumption in the last years, pear production is still incipient in Brazil, supplying only 12% of the internal demand, mostly because the lack of crop technology, especially regarding to climatic adaptation in different regions.
For this reason, a field experiment has been carried out since 2004, aiming to study the behavior of some pear cultivars grafted on quince ‘CP’ dwarfing rootstock, in Paraná State, southern Brazil.
The pear trees were spaced 1.0×4.0 m and trained to a slender spindle.
The trial was laid out using a randomized block design with five treatments, five replications and five-plant plots.
In this paper the data are presented of phenological stages and their respective accumulated heat units (base temperature = 7.2°C) in the first crop.
For ‘Cascatense’, ‘Tenra’, ‘Hosui’, ‘Packham`s Triumph’ and ‘Williams’ pear trees the accumulated degree-days were respectively, from bud burst to full bloom: 96, 212, 466, 833 and 994, and from full bloom to harvest: 1109, 1525, 1271, 1472 and 1477. The number of days following full bloom (DFFB) were 102, 113, 93, 104 and 104; corresponding to the harvest dates of 16.12.2005, 21.01.2006, 21.01.2006, 02.03.2006 and 10.03.2006 for the ‘Cascatense’, ‘Tenra’, ‘Hosui’, ‘Packham`s Triumph’ and ‘Williams’ pear trees, respectively.

VIII International Symposium on Temperate Zone Fruits in the Tropics and Subtropics

R.V. Botelho, E. Schreider, J. Souza, A.P. Pavanello, M.M.L. Müller

warm climate, Pyrus, dwarf rootstock, Cydonia oblonga, heat units, degree-day

https://doi.org/10.17660/ActaHortic.2010.872.55