Effects of Several Preharvest Canopy Applications on Yield and Quality of Table Grapes (<i>Vitis vinifera</i> L.) <i>Cv</i>. Crimson Seedless
Modern viticultural areas are being confronted with the negative impacts of global warming on yield and fruit composition, with especially adverse effects on anthocyanin synthesis. Novel and sustainable tools, such as biostimulants, may represent a viable alternative to traditional cultural practice...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/10/5/906 |
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| author | Despoina G. Petoumenou Vasileios-Emmanouil Patris |
| author_facet | Despoina G. Petoumenou Vasileios-Emmanouil Patris |
| author_sort | Despoina G. Petoumenou |
| collection | DOAJ |
| description | Modern viticultural areas are being confronted with the negative impacts of global warming on yield and fruit composition, with especially adverse effects on anthocyanin synthesis. Novel and sustainable tools, such as biostimulants, may represent a viable alternative to traditional cultural practices, thus promoting eco-friendly strategies to enhance the yield, fruit quality and abiotic stress tolerance of grapevines. ‘Crimson Seedless’ is a late-season red table grape variety, and due to climatic warming, its berries are frequently failing to acquire the commercially acceptable red color. Canopy applications of different biostimulants, namely, Kelpak<sup>®</sup>, Sunred<sup>®</sup>, Cytolan<sup>®</sup>, LalVigne™ Mature as well as Ethrel<sup>®</sup> Top, were tested on grapevine <i>cv</i>. Crimson Seedless grown under semi-arid Mediterranean conditions in order to evaluate their effects on yield and fruit quality. Some of the products were sprayed in canopies at labeled doses, and some were applied at doses reported in other studies. For the control treatment, canopies were sprayed with water. Sampling started at veraison and was repeated at 10-day intervals to measure the evolution of berry weight, length and diameter, as well as the total soluble solids and titratable acidity of the juice. The grapes were harvested when the berries of one of the treatments attained the commercially acceptable color. The greatest improvements in the red berry color were achieved with Sunred<sup>®</sup> (at a dose of 4 L ha<sup>−1</sup>) and Ethrel<sup>®</sup> Top (250 ppm plus glycerol at 1%), each applied at veraison and 10 days later. The different applications had varying effects on productivity and qualitative parameters. Only Sunred<sup>®</sup> improved the accumulation of anthocyanin and the overall acceptability of table grapes by consumers. The obtained results clearly demonstrate that applying Sunred<sup>®</sup> can improve the yield and qualitative parameters of the red table grape variety ‘Crimson Seedless’, indicating that this biostimulant could be a viable alternative to the most widely used plant growth regulator, ethephon. |
| first_indexed | 2024-03-10T11:48:26Z |
| format | Article |
| id | doaj.art-b3638888ef4247f791d8e4dcf90f5d20 |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-10T11:48:26Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-b3638888ef4247f791d8e4dcf90f5d202023-11-21T17:54:57ZengMDPI AGPlants2223-77472021-04-0110590610.3390/plants10050906Effects of Several Preharvest Canopy Applications on Yield and Quality of Table Grapes (<i>Vitis vinifera</i> L.) <i>Cv</i>. Crimson SeedlessDespoina G. Petoumenou0Vasileios-Emmanouil Patris1Laboratory of Viticulture, Department of Agriculture Crop Production and Rural Environment, University of Thessaly, 38446 Volos, GreeceLaboratory of Viticulture, Department of Agriculture Crop Production and Rural Environment, University of Thessaly, 38446 Volos, GreeceModern viticultural areas are being confronted with the negative impacts of global warming on yield and fruit composition, with especially adverse effects on anthocyanin synthesis. Novel and sustainable tools, such as biostimulants, may represent a viable alternative to traditional cultural practices, thus promoting eco-friendly strategies to enhance the yield, fruit quality and abiotic stress tolerance of grapevines. ‘Crimson Seedless’ is a late-season red table grape variety, and due to climatic warming, its berries are frequently failing to acquire the commercially acceptable red color. Canopy applications of different biostimulants, namely, Kelpak<sup>®</sup>, Sunred<sup>®</sup>, Cytolan<sup>®</sup>, LalVigne™ Mature as well as Ethrel<sup>®</sup> Top, were tested on grapevine <i>cv</i>. Crimson Seedless grown under semi-arid Mediterranean conditions in order to evaluate their effects on yield and fruit quality. Some of the products were sprayed in canopies at labeled doses, and some were applied at doses reported in other studies. For the control treatment, canopies were sprayed with water. Sampling started at veraison and was repeated at 10-day intervals to measure the evolution of berry weight, length and diameter, as well as the total soluble solids and titratable acidity of the juice. The grapes were harvested when the berries of one of the treatments attained the commercially acceptable color. The greatest improvements in the red berry color were achieved with Sunred<sup>®</sup> (at a dose of 4 L ha<sup>−1</sup>) and Ethrel<sup>®</sup> Top (250 ppm plus glycerol at 1%), each applied at veraison and 10 days later. The different applications had varying effects on productivity and qualitative parameters. Only Sunred<sup>®</sup> improved the accumulation of anthocyanin and the overall acceptability of table grapes by consumers. The obtained results clearly demonstrate that applying Sunred<sup>®</sup> can improve the yield and qualitative parameters of the red table grape variety ‘Crimson Seedless’, indicating that this biostimulant could be a viable alternative to the most widely used plant growth regulator, ethephon.https://www.mdpi.com/2223-7747/10/5/906biostimulants<i>Vitis vinifera</i>anthocyaninsseaweed extract<i>Ecklonia maxima</i><i>Ascophyllum nodosum</i> |
| spellingShingle | Despoina G. Petoumenou Vasileios-Emmanouil Patris Effects of Several Preharvest Canopy Applications on Yield and Quality of Table Grapes (<i>Vitis vinifera</i> L.) <i>Cv</i>. Crimson Seedless Plants biostimulants <i>Vitis vinifera</i> anthocyanins seaweed extract <i>Ecklonia maxima</i> <i>Ascophyllum nodosum</i> |
| title | Effects of Several Preharvest Canopy Applications on Yield and Quality of Table Grapes (<i>Vitis vinifera</i> L.) <i>Cv</i>. Crimson Seedless |
| title_full | Effects of Several Preharvest Canopy Applications on Yield and Quality of Table Grapes (<i>Vitis vinifera</i> L.) <i>Cv</i>. Crimson Seedless |
| title_fullStr | Effects of Several Preharvest Canopy Applications on Yield and Quality of Table Grapes (<i>Vitis vinifera</i> L.) <i>Cv</i>. Crimson Seedless |
| title_full_unstemmed | Effects of Several Preharvest Canopy Applications on Yield and Quality of Table Grapes (<i>Vitis vinifera</i> L.) <i>Cv</i>. Crimson Seedless |
| title_short | Effects of Several Preharvest Canopy Applications on Yield and Quality of Table Grapes (<i>Vitis vinifera</i> L.) <i>Cv</i>. Crimson Seedless |
| title_sort | effects of several preharvest canopy applications on yield and quality of table grapes i vitis vinifera i l i cv i crimson seedless |
| topic | biostimulants <i>Vitis vinifera</i> anthocyanins seaweed extract <i>Ecklonia maxima</i> <i>Ascophyllum nodosum</i> |
| url | https://www.mdpi.com/2223-7747/10/5/906 |
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