African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Sunflower seed treatment with growth inhibitor: Crop development aspects and yield

Domingos da Costa Ferreira Júnior
  • Domingos da Costa Ferreira Júnior
  • Department of Biology Applied to Agriculture (DBAA), Universidade Estadual Paulista Julio de Mesquita Filho, Campus Jaboticabal, Jaboticabal, SP, Brazil.
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Jorge Luiz Gonçalves Machado
  • Jorge Luiz Gonçalves Machado
  • Institute of Agricultural Sciences, Universidade Federal de Uberlândia, Campus Umuarama, Uberlândia, Brazil.
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Polianna Alves Silva
  • Polianna Alves Silva
  • School of Agriculture, Universidade Federal de Goias, Goiania, Brazil.
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Monique Ferreira de Souza
  • Monique Ferreira de Souza
  • Department of Entomology, Louisiana State University, Baton Rouge, United States of America.
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Reginaldo de Camargo
  • Reginaldo de Camargo
  • Institute of Agricultural Sciences, Universidade Federal de Uberlândia, Campus Umuarama, Uberlândia, Brazil.
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  •  Received: 04 June 2016
  •  Accepted: 09 August 2016
  •  Published: 25 August 2016

Abstract

Sunflower is one of the most important oleaginous crops designated for edible oil production in the world. However, Brazilian growers still do not have enough knowledge, and technical expertise, for expanding the sunflower crop yield through the adoption of new technologies, like the utilization of plant growth regulators (paclobutrazol). The aim of this work was to evaluate the effects of different doses (0, 50, 100, 150 and 200 mL ha-1) of the growth regulator paclobutrazol on agronomic characteristics of sunflower crop in Uberlandia, Minas Gerais State, Brazil. Treating the seed with paclobutrazol decreased the size of the disk flowers and the plant height, while the number of days to complete the development cycle increased. The yield was not affected by the different doses. The use of paclobutrazol in seed treatment is an interesting tool to manage the development of the sunflower crop, as it affects desirable parameters which does not reduce seed yield.

Key words: Helianthus annuus L., paclobutrazol, biorregulator.