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IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2013 9 GiESCO 2013 – Session 5: Vineyard management, yield, quality 9 Effect of early leaf removal on yield components, must composition and wine volatiles of Loureira cv. from north-west Spain

Effect of early leaf removal on yield components, must composition and wine volatiles of Loureira cv. from north-west Spain

Abstract

Yield management is a key technique in modern viticulture and is widely recognized as an important factor in the composition of resultant wines. Early leaf removal is an innovative viticulture practice for regulating yield components and improving grape and wine quality.

The aim of this study was to evaluate the effects of early leaf removal on chemical and aroma properties of the wines from Vitisvinifera cv. Loureira.

The treatments of leaf removal were performed at two phenological stages (pre-bloom and fruit-set) and two intensities (four and eight basal leaves). The experimental design compared five manual treatments: non defoliated control (C); removal of the first four basal leaves at pre-bloom (DF4); removal of the first eight basal leaves at pre-bloom (DF8); removal of the first four basal leaves at fruit set (DC4) and removal of the first eight basal leaves at fruit-set (DC8).

Significant differences were found in yield components and must composition. The results also showed significant differences among early leaf removal treatments when the wines were analyzed by gas chromatography (GC-MS). Early leaf removal meant an improvement in the aromatic composition of Loureira wines.

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Publication date: 07/09/2026

Issue: GiESCO 2013

Type: Poster

Authors

Luisa Freire1, Pilar Canosa2, Iria Rodríguez-Vega2, Mar Vilanova2,*

 1 Bodega Santiago Ruiz SAU. Vitivinicultor, 3, O Rosal (Pontevedra)

2 Misión Biológica de Galicia (CSIC). PO BOX 28, 38080, Pontevedra (Spain)

Contact the author*

Keywords

timing of leaf removal, white cutivar, aroma compounds

Tags

GiESCO | GiESCO 2013 | IVES Conference Series

Citation

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