PHYTOREGULATORS ON BUD FERTILITY AND CLUSTER QUALITY OF ‘THOMPSON SEEDLESS’ GRAPES GRAFTED ONTO ‘RAMSEY’ ROOTSTOCK

Authors

  • Patrícia Fernanda Inácio Vilar Department of Science and Technology, Universidade do Estado da Bahia, Juazeiro, BA.
  • Eder Ignácio de Souza Agriculture Engineer, Petrolina, PE.
  • Laise de Sousa Santos Agriculture Engineer, Petrolina, PE.
  • Emanuel Almeida Martinez Agriculture Engineer, Petrolina, PE.
  • Valtemir Gonçalves Ribeiro Department of Science and Technology, Universidade do Estado da Bahia, Juazeiro, BA.

DOI:

https://doi.org/10.1590/1983-21252017v30n111rc

Keywords:

Vitis vinífera L.. Plant regulator . Trinexapaque-etil. Benzyladenine.

Abstract

The objective of this work was to evaluate the influence of Trinexapaque-ethyl (TrixE) and benzyladenine (BA) on the fertility of buds and the quality of bunches of ‘Thompson Seedless’ grapes grafted onto ‘Ramsey’ rootstock, in the Vale São do Francisco. The experimental design consisted of randomized blocks with 16 treatments (doses and number of applications of the plant regulators TrixE and BA), with four replications, each composed of three plants, with one plant per plot. The variables analyzed were: overall potential bud fertility, potential of the basal, median and apical branches of the plant; fertility of potential buds from the basal region of the basal and median branches; fertility of overall real buds, and of the median and apical branches; diameter of the basal, median and apical branches; Falker chlorophyll index a, b and total; sprouting buds, number of clusters per branch, clusters per plant, branches per plant; berry diameter, length, volume; fresh material mass; soluble solids content (SS), titratable acidity (AT) and SS/AT relationship; diameter, length, mass of fresh material from the clusters; shatter, fresh material mass of the rachis and rachis diameter . It was shown that the TrixE applied in isolation , one, two or three times in doses of 20 mg L-1, or associated with BA in a single application of 120 or 240 mg L-1, increased the rate of real fertility, but did notaffect the length of the clusters or the vegetative vigor of the plants.

Author Biographies

  • Patrícia Fernanda Inácio Vilar, Department of Science and Technology, Universidade do Estado da Bahia, Juazeiro, BA.
    Mestre em Agronomia, área de concentração em Horticultura Irrigada pela Universidade do Estado da Bahia (DTCS/UNEB).
  • Eder Ignácio de Souza, Agriculture Engineer, Petrolina, PE.
    Engenheiro Agrônomo pela Universidade Estadual Paulista (FCAV-Jaboticabal)
  • Laise de Sousa Santos, Agriculture Engineer, Petrolina, PE.
    Engenheira Agrônoma, M.Sc em Horticultura Irrigada pela Universidade do Estado da Bahia (DTCS/UNEB).
  • Emanuel Almeida Martinez, Agriculture Engineer, Petrolina, PE.
    Engenheiro Agrônomo, M.Sc em Horticultura Irrigada pela Universidade do Estado da Bahia (DTCS/UNEB).
  • Valtemir Gonçalves Ribeiro, Department of Science and Technology, Universidade do Estado da Bahia, Juazeiro, BA.
    Prof. D.Sc.; Departamento de Tecnologia e Ciencias Sociais, Universidade do Estado da Bahia (DTCS/UNEB).

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Published

02-12-2016

Issue

Section

Agronomy