Effects of promalin (6BA+GA4+7) on growth and development of apple fruits (Malus domestica, Borkh.) cv. Gala

Abstract

The aim of the current manuscript was to analyze the effect of application of Promalinâ(GA4,7 + BA) on yield parameters of apple crop in a trial carried out at Porto Amazonas, Southern region of Paraná State. The trees were three year old grafted onto Maruba rootstock spaced 4 m x 1.4 m. The variables evaluated were length, fresh mass and diameters of the fruit, soluble solids (SS) and flesh firmness. For all the variables no significant changes had been observed. The lack of weight increase and without changes in fruit shape do not allow to validate Promalin use for Parana Central Southern conditions.