terclim by ICS banner
IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2023 9 Carry over effect of shoot trimming and deficit irrigation on fruit yield and berry total soluble solids

Carry over effect of shoot trimming and deficit irrigation on fruit yield and berry total soluble solids


Context and purpose of the study – The increase in air temperature that is occurring in many important wine-growing areas around the world is resulting in the decoupling between the phenolic and the technological maturity of grapevine berries. This new ripening pattern leads to the production of light-bodied high alcoholic wines, but this is in countertendency with the increasing consumers’ demand for wines with low-to-mid alcohol concentrations. The oenological techniques proposed to reduce wine alcohol content are often very expensive and lead to detrimental effects on wine quality. Many viticultural practices have been proposed to slow down sugar accumulation the berry. One possible strategy that was previously found to be suitable for Aglianico grapevine is post-veraison shoot trimming. The aim of this work was to assess the carry over effects on the following year of shoot trimming and vine water status on yield and total soluble solids because the expected reduction in vine fertility could lead to a reduction in the effectiveness of shoot trimming. 

Material and methods – The trial was carried out over four years (from 2017 to 2020) in a commercial vineyard located in Mirabella Eclano (Avellino, Italy). Vines were 13-year-old Aglianico grapevines (Vitis vinifera L.) grafted onto K5BB, spaced 2.5 × 1.0 m, trained to a bilateral spur cordon with a N-S row orientation. The experimental design was a randomized complete block design with nine treatments and four blocks; The treatments resulted from the combination of three levels of shoot trimming with three different irrigation strategies applied when the total soluble solids (TSS) were 12 °Brix. Shoot trimming treatments consisted in the removal of 30% and 60% of leaf area (respectively T30 and T60) and a untrimmed control (T0), whereas irrigation treatments replaced 0%, 50% or 100% of Etc (I0, I50, and I100, respectively). The harvest was performed when all the treatments reached phenolic maturity and yield and berry composition were measured.

Results – The results showed how severe shoot trimming can lead to a reduction in vine yield in the following years. This effect was manifested starting from the second year of the trial in rainfed vines exposed to severe trimmed, whereas this effect appeared later in irrigated and severely trimmed vines (3rd year of experiment). We found a negative relationship between yield and the intensity of water stress in the previous year, but this relationship is affected by the intensity of shoot trimming applied. However, yield reduction did not cause an increase in TSS as compensating effect in T60 vines. Severe shoot trimming reduced TSS content each year but the effect was found to be greater for dryer years. Mild shoot trimming conversely increased TSS in berry juice in particular during mild seasons.


Publication date: June 23, 2023

Issue: GiESCO 2023

Type: Article


Alessandro MATAFFO1, Pasquale SCOGNAMIGLIO1, Maurizio TEOBALDELLI1, Carlo MOLINARO1, Antonio DENTE2, Boris BASILE1*

1Department of Agricultural Sciences, University of Naples Federico II, Viale Italia, 83100 Avellino, Italy
2Mastroberardino Winery, 83042 Avellino, Italy

Contact the author*


Aglianico, canopy management, climate change, water stress, Southern Italy


GiESCO | GIESCO 2023 | IVES Conference Series


Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.