terclim by ICS banner
IVES 9 IVES Conference Series 9 Influence of the number of CPPU applications on growth, mineral composition and Bunch Stem Necrosis incidence in table grape clusters

Influence of the number of CPPU applications on growth, mineral composition and Bunch Stem Necrosis incidence in table grape clusters

Abstract

The forchlorfenuron (CPPU) application is recommended in table-grape after fruit-set to boost berry sizing, albeit growers also apply CPPU during pre-flowering with controversial advantages. We examined the effect of single (BBCH 15) and double (BBCH 15 and 57) CPPU applications (2.25 mg/L a.s.) in a commercial vineyard. At each time, 75-100 bunches belonging to 6-9 vines were sprayed, and compared with unsprayed (CTRL). Leaf stomatal conductance (gs), cluster stem diameter and length were measured. At harvest, 25 berries/repetition were sampled for chemical composition, BSN incidence was counted (N° necrotic laterals/10 cm of stem) in 40 bunches/repetition. To test the role of air VPD on mineral composition, at BBCH 77, 50 CTRL clusters were bagged to induce a low VPD.

Preliminary results showed a significant effect of CPPU on stem diameter when compared to that in untreated being 5.49 ±0.22 SE, 6.05 ±0.20 and 6.17 ±0.24 mm in CTRL, single and double CPPU applications, respectively. Cluster length and gs remained comparable across treatments. The number of CPPU applications did not affect berry Ca content (0.84 ±0.08 –single- and 0.85 ±0.03 mg berry-1 -double), whereas BSN incidence was significantly higher (2.63 ±0.33a) in the double CPPU applications than single (1.29 ±0.18b) and comparable to CTRL (1.75 ±0.24ab), leaving some open questions.

Based on the significant effect of VPD on berry Ca content (0.39 ±0.04 –bagged-, 1.81 ±0.84 mg berry-1 -CTRL), the use of management options (i.e. training systems, plant distances, covering, canopy manipulation) to increase Ca accumulation is discussed as alternative to chemical spray.

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Antonio Carlomagno, Giuseppe Montanaro*, Giuseppe Flores, Vitale Nuzzo

1 DiCEM – Università Degli Studi della Basilicata, Via dell’Ateneo Lucano 10, Potenza

Contact the author*

Keywords

PGRs, hormones, cytokinin, pre-anthesis, Vitis vinifera L..

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Effects of wine versus de-alcoholised wine on the microbiota-gut-brain axis in a tau-pathology murine model of Alzheimer’s disease

Alzheimer’s Disease (AD) is the most common disorder associated with cognitive impairment and the main cause of dementia globally. Multiple evidence in the last decade suggest that the gut microbiome plays an important role in the pathogenesis and progression of AD via the microbiota-gut-brain axis, a network wherein microbiome and the central nervous system crosstalk via endocrine, immune, neural, and microbial metabolites signalling pathways.

Innovative water status monitoring of white grape varieties with on-plant sensors

Context and Purpose. Climate change presents significant challenges to agricultural sustainability, particularly through the increasing frequency of drought and water scarcity.

Carbon isotope labeling to detect source-sink relationships in grapevines upon drought stress and re-watering

Kinetics of carbon allocation in the different plant sinks (root-shoot-fruit) competing in drought stressed and rehydrated grapevines have been investigated.

Phenolic extraction and dissolved oxygen concentration during red wines fermentations with Airmixig M.I.™

During red wine fermentation, the extraction of phenolics compounds and sufficient oxygen provision are critical for wine quality [1,2]. In this trial, we aimed at evaluating the kinetics of phenolic extraction and dissolved oxygen during red wine fermentations using the airmixing system. Twenty lots of red grape musts were fermented in 300.000 L tanks, equipped with airmixing, using two injection regimes (i.e., high and low intensity, and high and low daily frequency). An oxygen analyzer was introduced into the tanks in order to record the concentration of dissolved oxygen over time.

Beyond liking scores: the importance of the drinking experience to understand our consumers

The presentation will approach the understanding of wine consumers´ perception based on the experiential model suggested by Warell (2008). In this framework, wine consumption gives rise to a
variety of experiences related to the perception, understanding, and judgment of the product. These
multidimensional facets of the drinking experience can be explored by measuring affective, cognitive,
and sensory responses of consumers, which are shown to be stable regardless of the social context.