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Article

Cluster-Zone Leaf Removal and GA3 Application at Early Flowering Reduce Bunch Compactness and Yield per Vine in Vitis vinifera cv. Pinot Gris

1
Center Agriculture Food Environment (C3A), University of Trento, 38098 San Michele all’Adige, Italy
2
Research and Innovation Centre, Fondazione Edmund Mach, 38098 San Michele all’Adige, Italy
*
Authors to whom correspondence should be addressed.
Academic Editor: Boris Basile
Horticulturae 2022, 8(1), 81; https://doi.org/10.3390/horticulturae8010081
Received: 14 December 2021 / Revised: 4 January 2022 / Accepted: 12 January 2022 / Published: 15 January 2022
(This article belongs to the Special Issue Advances in Viticulture Production)
Compact bunches have been often associated with higher susceptibility to Botrytis cinerea and therefore reduction in berry quality in grapevine. The objective of this study was to evaluate three management methods (early leaf removal, gibberellic acid, and their combination) for reducing bunch compactness in Vitis vinifera cv. Pinot gris trained in two different training systems with contrasting vigor (Guyot and pergola). Treatments were applied at BBCH 62 or BBCH 65 and yield components, total soluble solids, fruit set, and bunch compactness parameters were evaluated. Both treatments individually reduced berry number, mean bunches weight and bunches compactness as well as yield per vine when compared to control-untreated vines. However, no major differences were observed when both the treatments were applied in combination for Guyot or pergola although a higher reduction in yield was detected for Guyot and a significant increase in total soluble solids was observed in pergola. Our study suggests that intense leaf removal and gibberellic acid applied at early flowering can help reducing bunch compactness in Pinot gris and showing it in two training systems. In particular, leaf removal represents a valuable alternative to plant growth regulators (i.e., gibberellic acid) as applicable in organic viticulture. View Full-Text
Keywords: leaf removal; gibberellic acid; bunch compactness; yield per vine leaf removal; gibberellic acid; bunch compactness; yield per vine
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MDPI and ACS Style

Wegher, M.; Faralli, M.; Bertamini, M. Cluster-Zone Leaf Removal and GA3 Application at Early Flowering Reduce Bunch Compactness and Yield per Vine in Vitis vinifera cv. Pinot Gris. Horticulturae 2022, 8, 81. https://doi.org/10.3390/horticulturae8010081

AMA Style

Wegher M, Faralli M, Bertamini M. Cluster-Zone Leaf Removal and GA3 Application at Early Flowering Reduce Bunch Compactness and Yield per Vine in Vitis vinifera cv. Pinot Gris. Horticulturae. 2022; 8(1):81. https://doi.org/10.3390/horticulturae8010081

Chicago/Turabian Style

Wegher, Mario, Michele Faralli, and Massimo Bertamini. 2022. "Cluster-Zone Leaf Removal and GA3 Application at Early Flowering Reduce Bunch Compactness and Yield per Vine in Vitis vinifera cv. Pinot Gris" Horticulturae 8, no. 1: 81. https://doi.org/10.3390/horticulturae8010081

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