terclim by ICS banner
IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2023 9 The informative potential of remote and proximal sensing application on vertical- and overhead-trained vineyards in Northeast Italy

The informative potential of remote and proximal sensing application on vertical- and overhead-trained vineyards in Northeast Italy


Context and purpose of the study

The application of remote and proximal sensing in viticulture have been demonstrated as a fast and efficient method to monitor vegetative and physiological parameters of grapevines. The collection of these parameters could be highly valuable to derive information on associated yield and quality traits in the vineyard. However, to leverage the informative potential of the sensing systems, a series of preliminary evaluations should be carried out to standardize working protocols for the specific features of a winegrowing area (e.g., pedoclimate, topography, cultivar, training system). This work aims at evaluating remote and proximal sensing systems for their performance and suitability to provide information on the vegetative, physiological, yield and qualitative aspects of vines and grapes as a function of different training systems in the Valpolicella wine region (Verona, Italy).

Material and methods

Five vineyards in the Valpolicella wine region were investigated for their intra-parcel variability during 2022 growing season. Three vineyards were trained with cane pruning vertical shoot positioning system (Guyot), while the other two were trained with cane pruning overhead system (Pergola). Blocks presenting intra-parcel variability were selected and monitored in each vineyard. The Normal Difference Vegetation Index (NDVI) was calculated using both the data of remote sensors such as the satellite Sentinel-2 and UAV-mounted multispectral camera, and a proximal handheld NDVI device. Further proximal sensor evaluation was carried out employing a handheld thermal camera, which estimates the Crop Water Stress Index (CWSI). The data collected from the sensors was then compared with that of direct measurements on the vines and the berries (e.g., bud fertility, shoot growth kinetics, leaf area, yield, berry skin thickness and technological berry ripening parameters). Multivariate and correlation analyses were applied to determine the relationship between the sensor data and the direct vine and berry measurements and to further evaluate the nature of these relationships as a function of the vine training system.


Multivariate analyses on the whole dataset distinguished the Guyot-trained blocks from the Pergola-trained blocks. Positive correlations emerged between the NDVI values obtained from the satellite images, the UAV images and the proximal NDVI sensor, which were ground-truthed by obtaining high positive correlations with a series of direct measurements, among which the bud fertility, the shoot growth kinetic, the leaf area and the crop yield. The vigor data correlated negatively with quality berry parameters such as the sugar and the polyphenolic content. The strength of the detected relationships varied as a function of the training system, suggesting different informative potential of the tested sensor systems for Guyot and Pergola.


Publication date: June 22, 2023

Issue: GiESCO 2023

Type: Article


Ron SHMULEVIZ*, Marianna FASOLI, Giovanni Battista TORNIELLI

Department of Biotechnology, University of Verona, 37134 Verona, Italy

Contact the author*


ground-truthing, proximal and remote sensing, NDVI, CWSI, training system, Valpolicella


GiESCO | GIESCO 2023 | IVES Conference Series


Related articles…

An excessive leaf-fruit ratio reduces the yeast assimilable nitrogen in the must

Yeast assimilable nitrogen (YAN) in the grape must is a key variable for wine quality as a source of aroma precursors. In a situation of YAN deficiency, a foliar urea application upon the vine at veraison enhances YAN concentration and facilitates must fermentation. In 2013, Agroscope investigated the impact of leaf-fruit ratio on the nitrogen (N) assimilation and partitioning in grapevine Vitis vinifera cv. Chasselas following foliar-urea application with the aim of improving its efficiency on the YAN concentration.

Extraction of polyphenols from grape marc by supercritical fluid extraction (SFE) and evaluation of their ‘bioavailability’ as dietary supplements

In the winemaking process, several compounds that remain in the grape skins and seeds after the fermentation stage are bioactive-compounds (substances with potential beneficial effects on health) that can be extracted in order to recovery valuable substances with a high commercial value for the cosmetic, food (nutraceuticals) and pharmaceutical industries. The skins contain significant amounts of bioactive substances such as tannins (16-27%) and other polyphenolic compounds (2-6.5%) in particular, catechins, anthocyanins, proanthocyanins, quercetin , ellagic acid and resveratrol.

The impacts of frozen material-other-than-grapes (MOG) on aroma compounds of red wine varieties

An undesirable note called “floral taint” has been observed in red wines by winemakers in the Niagara region caused by large volumes of frozen leaves and petioles [materials-other-than-grapes (MOG)] introduced during mechanical harvest and subsequent winemaking late in the season. The volatiles, which we hypothesized are responsible, are primarily terpenes, norisoprenoids, and specific esters in frozen leaves and petioles. The purpose of this study was to investigate the volatile compounds which may cause the floral taint problem and explore how much of them (thresholds) may lead to the problem. Also, the glycosidic precursors of some of these compounds were analyzed to see the changes happening during frost events.

Aromatic profile of six different clones of Chardonnay grape berries in Minas Gerais (Brazil)

Aromas are one of the key points in food analysis since they are related to character, quality and consequently consumer acceptance. It is not different in the winery industry, where the aromatic profile is a combination of viticultural and oenological practices. Based on the development of more aromatic clones and on the potential to produce sparkling wines at Caldas, in the southern region of Minas Gerais (Brazil) (21°55´S and 46°23´W, altitude 1,100m), the aim of this work was the determination of volatile compounds in six different clones of Chardonnay grape berries to better understand which compounds add bouquet to the wine, and additionally comprehend the impacts of the edaphoclimatic and annual conditions on the improvement of grape-growing and winemaking practices.

Improving stilbenes in vitis Labrusca L. Grapes through methyl jasmonate applications

Grapes (Vitis sp.) are considered a major source of phenolic compounds such as flavonols, anthocyanins and stilbenes. Studies related to the beneficial effects of these compounds on health have encouraged research aimed at increasing their concentration in fruits. On this behalf, several plant growth regulators such as jasmonic acid and its volatile ester, methyl-jasmonate (MeJa), have demonstrated promising results in many fruits. However, Brazilian subtropical climate might interfere on treatment response. The present study aims to evaluate the application of MeJa in the pre-harvest period in Concord and Isabel Precoce grapes (Vitis labrusca L.).