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Revista Ceres

Print version ISSN 0034-737XOn-line version ISSN 2177-3491

Abstract

MARCON FILHO, José Luiz et al. Increasing the length of EM-9 interstock enhances production efficiency in Imperial Gala apples. Rev. Ceres [online]. 2019, vol.66, n.3, pp.178-183.  Epub Aug 12, 2019. ISSN 0034-737X.  https://doi.org/10.1590/0034-737x201966030003.

The objective of this study was to evaluate the influence of different lengths of EM-9 interstock, on the production and fruit characteristics of Imperial Gala apples more than eight years old. This experiment was conducted in a commercial orchard located in Vacaria-RS, Brazil, situated at an altitude of 955 m , during seasons 2005/06, 2007/08, 2010/11, 2011/12 and 2012/13. The treatments consisted of five lengths of EM-9 interstock (10, 15, 20, 25 and 30 cm) connecting the Marubakaido rootstock to the Imperial Gala scion. For production efficiency a positive correlation between increased efficiency and the length of interstock was observed. Likewise a positive correlation was also noted for quality parameters of the fruit; firmness and classification (Category 1). From this study we conclude that a EM-9 interstock of 30 cm on Marubakaido rootstock is the most suitable for the vigor control of Imperial Gala apples, it ensures greater production efficiency and firmer fruit.

Keywords : Mallus domestica; Marubakaido; rootstock; production; fruit quality.

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