Fitoreguladores como estratégia para o controle de vigor em macieiras Fuji

Abstract

The apple culture represents an important agricultural chain within the national productive sector, but there are still some aspects that must be improved to increase production and productivity. One of these points is the appropriate balance between vegetative growth and productive potential in plants. For control of vegetative vigor one of the tools is the use of phytogulators. In this sense, the objective of this work was to evaluate the effect of different doses of Proxadione Calcium on the development of branches and efficiency in fruit production, as well as to compare the effectiveness of its action with different commercial products applied to vegetative control in Fuji apple trees. Two experiments were carried out in the municipality of São Joaquim, in Santa Catarina, Brazil. The first experiment tested different doses (200, 400 and 600mg L-1) of Proxadione Calcium in the 2014/15 cycle, the second experiment compared Proxadione Calcium (Viviful®) with other products (MX extra and Masbrix) in commercial formulation . The analyzed variables were the growth of branches, the effective fruiting, number and weight of fruits. In the first experiment, a greater proportion of branches with a length of less than 20cm were found in plants treated with Proxadione Calcium. Already the second experiment showed a significant difference for the growth of the branches in the Proxadione Calcium treatment in relation to the other products, in addition, there was no loss in the production and fruit quality. In this way, we can say that a single application of 200mg/L Proxadione Calcium is efficient in reducing branch length and does not negatively influence the production standards.