Plant growth regulators as thinners in guava orchards increase larger fruits with higher nutritional value

  • Marcelo de Souza Silva Faculty of Higher Education and Integral Training, FAEF, Garça, SP. Brazil, 2 Department of Horticulture, School of Agriculture, Sao Paulo State University (UNESP), Botucatu, São Paulo, Brazil
  • Sarita Leonel 2 Department of Horticulture, School of Agriculture, Sao Paulo State University (UNESP), Botucatu, São Paulo, Brazil, 3
  • Magali Leonel Tropical Root and Starches Center, Sao Paulo State University (UNESP), Botucatu, São Paulo, Brazil, 4
  • Jackson Mirellys Azevedo Souza Department of Agronomy, Viçosa Federal University, UFV, Viçosa, MG, Brazil
  • Rafael Bibiano Ferreira Department of Horticulture, School of Agriculture, Sao Paulo State University (UNESP), Botucatu, São Paulo, Brazil
  • Rafaelly Calsavara Martins

Abstract

The production of large guavas guarantees better market prices. Chemical thinning is a practice performed to increase fruit size and
nutritional value with benefits for growers and consumers. By using ethephon and benzyladenine at 0, 150, 300 and 450 mg L-1, fruit
thinning in red guava was evaluated. The percentage of fruit setting and increase in fruit mass, marketable yield, soluble solids (SS),
titratable acidity (TA), SS/TA ratio, pH, sugars, ascorbic acid, antioxidant activity, total phenolic compounds, flavonoids and pigments
were evaluated. The plant growth regulators improved the setting of larger fruits. Fruit thinning higher efficiency was observed in the
ethefhon and benzyladenine concentrations from 300 mg L-1 and upwards, however, benzyladenine induced phytotoxicity at the same
concentrations. The chemical thinning can be used to promote larger fruits with better uniformity favoring higher marketability and as a
source of interest compounds enhancing nutritional guava fruits value depending on the thinner and the concentration

Author Biographies

Marcelo de Souza Silva, Faculty of Higher Education and Integral Training, FAEF, Garça, SP. Brazil, 2 Department of Horticulture, School of Agriculture, Sao Paulo State University (UNESP), Botucatu, São Paulo, Brazil

Faculty of Higher Education and Integral Training, FAEF, Garça, SP. Brazil, 2
Department of Horticulture, School of Agriculture, Sao Paulo
State University (UNESP), Botucatu, São Paulo, Brazil

Sarita Leonel, 2 Department of Horticulture, School of Agriculture, Sao Paulo State University (UNESP), Botucatu, São Paulo, Brazil, 3


Department of Horticulture, School of Agriculture, Sao Paulo
State University (UNESP), Botucatu, São Paulo, Brazil, 3

Magali Leonel, Tropical Root and Starches Center, Sao Paulo State University (UNESP), Botucatu, São Paulo, Brazil, 4

Tropical Root and Starches Center, Sao Paulo State University (UNESP), Botucatu,
São Paulo, Brazil, 4

Jackson Mirellys Azevedo Souza, Department of Agronomy, Viçosa Federal University, UFV, Viçosa, MG, Brazil

Department of Agronomy, Viçosa Federal University, UFV, Viçosa, MG, Brazil

Rafael Bibiano Ferreira, Department of Horticulture, School of Agriculture, Sao Paulo State University (UNESP), Botucatu, São Paulo, Brazil


Department of Horticulture, School of Agriculture, Sao Paulo
State University (UNESP), Botucatu, São Paulo, Brazil

Rafaelly Calsavara Martins


Department of Horticulture, School of Agriculture, Sao Paulo
State University (UNESP), Botucatu, São Paulo, Brazil

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How to Cite
de Souza Silva, M., S. Leonel, M. Leonel, J. Mirellys Azevedo Souza, R. Bibiano Ferreira, and R. Calsavara Martins. “Plant Growth Regulators As Thinners in Guava Orchards Increase Larger Fruits With Higher Nutritional Value”. Emirates Journal of Food and Agriculture, Vol. 34, no. 2, Mar. 2022, doi:https://doi.org/10.9755/ejfa.2022.v34.i2.2815. Accessed 30 June 2022.
Section
Research Article