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Effect of using selected growth regulators to reduce sunflower stand height

Author

Listed:
  • Tomáš SPITZER

    (Agrotest Fyto, Ltd., Kroměříž, Czech Republic)

  • Jan BÍLOVSKÝ

    (Agrotest Fyto, Ltd., Kroměříž, Czech Republic)

  • Jan KAZDA

    (Department of Plant Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

Abstract

Influence of plant growth regulators chlormequat chloride, chlormequat chloride + ethephon, ethephon, and mepiquat chloride + prohexadione-Ca + pyraclostrobin + ammonium sulphate (BAS67800F + BAS00800D) on decreasing sunflower height was evaluated. It was determined that sunflower height can be reduced by as much as 30 cm. In the case of BAS67800F + ammonium sulphate, there was a slight difference between application at BBCH 31-33 and BBCH 50-51, whereas for ethephon better application time was at BBCH 50-51. For chlormequat chloride, application at BBCH 31-33 was better, but height reduction did not endure until harvest. Flower head diameter shortly before harvest was not affected at any tested regulator. Flowering was delayed primarily at applications at BBCH 50-51.

Suggested Citation

  • Tomáš SPITZER & Jan BÍLOVSKÝ & Jan KAZDA, 2018. "Effect of using selected growth regulators to reduce sunflower stand height," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 64(7), pages 324-329.
    • Handle: RePEc:caa:jnlpse:v:64:y:2018:i:7:id:213-2018-pse
    DOI: 10.17221/213/2018-PSE
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    References listed on IDEAS

    as
    1. T. Spitzer & P. Matušinský & Z. Klemová & J. Kazda, 2011. "Management of sunflower stand height using growth regulators," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 57(8), pages 357-363.
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