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Effect of Aminoethoxyvinylglycine (AVG) Applications on Pre-Harvest Drop and Fruit Quality of ‘Red Delicious, Red Chief’ Apple Cultivar

Wirkung von Aminoethoxyvinylglycin (AVG)-Applikationen auf den Vorerntefruchtfall und die Fruchtqualität der Apfelsorte ‘Red Delicious, Red Chief’

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Abstract

The study was carried out to determine the effect of different aminoethoxyvinylglycine (AVG) application doses on pre-harvest fruit drop in semi-dwarf rootstock grafted to ‘Red Delicious, Red Chief’ apple in Central Anatolia Region, Turkey. Different concentrations of AVG (0, 250, 500, 750 mg/l) were applied to apple trees 4 weeks before the anticipated harvest to assess the effects of AVG on fruit drop and fruit quality. Cumulative drop percentage (%), fruit removal force (N), fruit weight (g), flesh firmness (N), soluble solids concentration (SSC, %), pH, titratable acidity (TA, g malic acid 100 g−1) and fruit color (L*, C*, h°) were determined. All AVG doses significantly reduced the cumulative drop percentage compared to the control treatment. The fruit removal force and fruit flesh firmness increased, and SSC decreased compared to control with the increasing AVG doses. The amount of TA increased with the increasing AVG doses while pH decreased. The fruit weight did not change, and the red color formation was delayed by the increasing of AVG doses.

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Acknowledgements

This work was funded by the Scientific Research Projects Coordination Unit of Kırşehir Ahi Evran University (Project Number ZRT.A4.19.002). In addition, I would like to thank Assoc. Prof. Dr. Burhan Öztürk in Ordu University for his contributions to the study, and ValentBioScience Company providing the ReTain.

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  1. Department of Horticulture, Faculty of Agriculture, Kırşehir Ahi Evran University, Kırşehir, Turkey

    Selma Boyacı

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  1. Selma Boyacı
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Correspondence to Selma Boyacı.

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S. Boyacı declares that she has no competing interests.

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Boyacı, S. Effect of Aminoethoxyvinylglycine (AVG) Applications on Pre-Harvest Drop and Fruit Quality of ‘Red Delicious, Red Chief’ Apple Cultivar. Erwerbs-Obstbau 64, 395–400 (2022). https://doi.org/10.1007/s10341-022-00662-1

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  • DOI: https://doi.org/10.1007/s10341-022-00662-1

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