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…

The start of Croatian grapevine breeding program

Modern viticulture in Croatia and the world is mainly based on the grapevine varieties susceptible to various diseases and pests, which leads to unsustainable use of large amounts of pesticides. The sustainable development of viticulture in the future will only be possible by increasing the resistance of the grapevine through the development of new resistant varieties. Breeding programs have been launched in the leading wine-growing countries with the aim of developing resistant varieties possessing high quality level. Coratia is rich in in native grapevine varieties that are the basis of wine production, and are not included in the breeding programs of other countries.

Methyl jasmonate versus nano methyl jasmonate: effects on anthocyanins mature evolution in monastrell grapes

The climate change is afecting particulary to the South of Spain, with high temperatures. It is important to develop new strategies in order to mantain the quality of wines

Plastic cover film on table grapes from field to cold storage

Plastic film covering is a technique largely used in viticulture to protect table grapes vines from adverse weather conditions and to reduce the negative effects of grapevine fungi disease. Plastic film composition affects solar radiation income inside the covering with effects on sunlight wavelengths in relation to different absorbance and reflectance. The interaction of selected light ranges with vines could influence grape ripening and yield and consequently influence shelf life.

Histoire des Vitis depuis leurs origines possibles sur la Pangée jusqu’aux cépages cultivés : un exemple de résilience liée à la biodiversité des espèces

The first forms of life on earth were bacteria and single-celled blue-green algae. They evolved into land plants around 500 million years ago, developing mechanisms for surviving on land, such as roots, stems and leaves. This evolution also led them to coexist with other organisms, such as insects and animals, for pollination and seed dispersal, as well as to resist environmental factors such as drought and disease.

A zoning study of the viticultural territory of a cooperative winery in Valpolicella

The Valpolicella hilly area, north of Verona, is highly vocated for viticulture but its vineyards are sometimes characterized by very different soil and microclimate conditions which can greatly affect their oenological potential.