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Effects of Different Dosages of ReTain (Aminoethoxyvinylglycine) on Pre-Harvest Fruit Drop and Fruit Quality of ‘Golden Delicious’ Apple

Einfluss unterschiedlicher ReTain-Dosierungen (Aminoethoxyvinylglycine) auf den Vorerntefruchtfall und die Fruchtqualität bei der Apfelsorte ‘Golden Delicious’

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Abstract

The study was carried out to reduce the losses due to the yield-fruit quality caused by the pre-harvest fruit drop problem of the ‘Golden Delicious’ variety. To increase the profitability of the producer in the orchards established with this variety, the effects of ReTain, a human and environmentally friendly commercial product that can be used in practical application, in different dosages on pre-harvest fruit drop, and fruit quality were examined. The study was conducted in the ‘Golden Delicious’ apple orchard grown in two different locations (Egirdir and Civril) between 2016 and 2017. ReTain’s dosages of 830 g/ha, 700 g/ha, 550 g/ha, 400 g/ha were applied to fruits and leaves 4 weeks before the estimated harvest. Water + Tween 20 (surfactant) were sprayed to control trees. In both locations, all ReTain applications had significantly reduced pre-harvest fruit drop. It also increased the fruit size and weight. As a result, considering both fruit loss and fruit quality; the most suitable practical application for the ‘Golden Delicious’ apple variety was determined to be ReTain 830 g/ha 4 weeks before the estimated harvest.

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Acknowledgements

We would like to thank Sumitomo Chemical Turkey for their support for the project Fruit Research Institute, Turkey.

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Authors and Affiliations

  1. Fruit Research Institute, 32500, Egirdir, Isparta, Turkey

    Melike Çetinbaş & Sinan Butar

  2. Technical Sciences Vocational School, Plant and Animal Production Department, Karamanoglu Mehmetbey University, Karaman, Turkey

    Yılmaz Sesli

Authors
  1. Melike Çetinbaş
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  2. Sinan Butar
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  3. Yılmaz Sesli
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Corresponding author

Correspondence to Melike Çetinbaş.

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M. Çetinbaş, S. Butar and Y. Sesli declare that they have no competing interests.

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Çetinbaş, M., Butar, S. & Sesli, Y. Effects of Different Dosages of ReTain (Aminoethoxyvinylglycine) on Pre-Harvest Fruit Drop and Fruit Quality of ‘Golden Delicious’ Apple. Erwerbs-Obstbau 64, 387–394 (2022). https://doi.org/10.1007/s10341-022-00661-2

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  • DOI: https://doi.org/10.1007/s10341-022-00661-2

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