terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Late pruning, an alternative for rainfed vine varieties facing new climatic conditions

Late pruning, an alternative for rainfed vine varieties facing new climatic conditions

Abstract

In Chile there is a dry farming area known as a traditional wine region, where varieties brought by the Spanish conquerors still persist. These varieties, in general, are cultivated under traditional systems, with low use of technical and economic resources, and low profitability for their grapes and wines. In this region, as in other wine grape growing areas, climatic conditions have changed significantly in recent decades. In particular, the occurrence of spring frosts, when bud break has already begun, have generated significant losses for these growers.

Under this scenario and in search of a low-cost alternative to mitigate the spring frost damage in the País variety, during the 2021-2022 season, late pruning was tested in phenological stages E4 and E9 (according E-L modified scale) compared to the winter pruning (PI). The results showed that, in relation to PI, the pruning carried out at E4 and E9 delayed bud break seven and 10 days respectively, and the differences in the phenological development remained until stage 32, when they were aligned. Pruning at E4 allowed better vegetative development than PI in terms of shoot length. Maturity was slower the later the pruning was, and at harvest time a difference of almost 2°Brix was registered between the late pruning and the PI. Regarding yield, differences in the number and weight of bunches showed that yields were similar in treatments E4 and PI, while E9 had a lower yield than PI.

Pruning at E9 is not be recommended since it generated a lower yield and presented problems in the bunch ripening uniformity, but pruning at E4 represents a great alternative to avoid spring frost damage and keep vineyard quality and yield.

DOI:

Publication date: October 18, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Marisol Reyes1*, Carolina Salazar2, M. Cecilia Peppi2

1Instituto de Investigaciones Agropecuarias (INIA) Raihuén, Esperanza s/n, Estación Villa Alegre. Chile.
2Instituto de Investigaciones Agropecuarias (INIA) La Platina, Santa Rosa 11610, Santiago, Chile.

Contact the author*

Keywords

climate change, maturity, budbreak, drylands

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Evaluation of Furmint clones in the Tokaj Wine Region

The ’Furmint’ is the most important grape variety in the Tokaj Wine Region, constituting around 65% of its vineyard area. Before the phylloxera disease many types were grown, but as selection started in the 20th century, its diversity dramatically narrowed. As a result, the cultivation of Furmint was based mainly on two heavy-cropping clones, T.85 and T.92 at the end of the ’80s. Aims of present clone research take into account that after solely quantity as target, quality emerged in the 1990’s and most recently, typicity appeared as more private estates began their own selection program.

Control of bacterial growth in carbonic maceration winemaking through yeast inoculation

Controlling the development of the bacterial population during the winemaking process is essential for obtaining correct wines[1]. Carbonic Maceration (CM) wines are recognised as high-quality young wines. However, due to its particularities, CM winemaking implies a higher risk of bacterial growth: lower SO2 levels, enrichment of the must in nutrients, oxygen trapped between the clusters… Therefore, wines produced by CM have slightly higher volatile acidity values than those produced by the destemming/crushing method[2].

Tackling the 3D root system architecture of grapevines: a new phenotyping pipeline based on photogrammetry

Plant roots fulfil important functions as they are responsible for the acquisition of water and nutrients, for anchorage and stability, for interaction with symbionts and, in some cases, for the storage of carbohydrates. These functions are associated with the Root System Architecture (RSA, i.e. the form and the spatial arrangement of the roots in the soil). The RSA results from several biological processes (elongation, ramification, mortality…) genetically determined but with high structural plasticity.

The colour pattern of flower arrangements influence wine tasters’ sensory description

The arrangements of flowers and wine counterparts are inextricably linked. Whether a fundamental aspect of tablescaping or acolytes to broader entertainment rituals, they have an entangled history since ancient times. The aim of this contribution is to verify the influence of visually delicate and robust flower arrangements on individual description of wines. Changes in the sensory description of wines were investigated during subjects’ (thirty-two participants) exposure to three different conditions: the presence of delicate, robust, or totally absent flower arrangements.

REGAVID a decision tool to deficit irrigation in a temperate climate (DO Monterrei – Spain)

In temperate climates, such as in the North of Spain, the use of irrigation in the vineyard has not been required, due to the usual rainfall from June to August. In some large vineyards, irrigation management has been carried out, based on occasional support irrigation, or for the application of nutrients (fertigation). Currently it is necessary to implement decision support models to manage irrigation water in real time and avoid misuse of a scarce resource. Moreover, quality standards must be achieved, as in the previous rainfed viticulture.