Terroir 1996 banner
IVES 9 IVES Conference Series 9 Spatial characterisation of terrain units in the Bottelaryberg-Simonsberg-Helderberg wine growing area (South Africa)

Spatial characterisation of terrain units in the Bottelaryberg-Simonsberg-Helderberg wine growing area (South Africa)

Abstract

The first South African wine was made by Jan van Riebeeck on the second of February 1659. His initial determination to produce wine at the Cape refreshment station was continued by other governors resulting in improvement and expansion of the embryo industry. As the colony opened up and new areas were discovered, so the wine industry developed to its present extent of over 100 000 ha (SAWIS, 1999). The initial expansion was based on ease of access and mainly focussed on fertile valleys, with rivers to provide irrigation in the more arid regions. Yield was often the overriding factor considered. However, when over-production became a problem in the early twentieth century, the focus was moved to quality. This eventually resulted in the introduction of the Wine of Origin legislation in 1973. South Africa is, therefore, a relatively young wine-producing country and has little tradition or experimental data to support delimitation of areas of origin. Such areas are demarcated on application by the producers. Natural factors, such as landscape, soil and macroclimatic patterns are used to determine boundaries, after which these demarcated areas are allowed to develop to express their specific wine style and character instead of proving their originality beforehand (Saayman, 1998). The identification and spatial characterisation of terrain units will act, therefore, as a scientific basis for the delimitation of areas for the production of characteristic wines of high quality. It will also provide an important basis for future development and management decisions and enable South Africa to remain competitive in an ever-expanding international wine market.

DOI:

Publication date: February 24, 2022

Issue: Terroir 2000

Type: Article

Authors

Victoria. Carey (1), V.B.F. Bonnardot (2)

(1) ARC Infruitec-Nietvoorbij, Private Bag X5026, Stellenbosch 7599, South Africa
(2) ARC Institute for Soil Climate and Water, Private Bag X5026, 7599 Stellenbosch, Republic of South Africa

Tags

IVES Conference Series | Terroir 2000

Citation

Related articles…

Exploring zoxamide sensitivity in Plasmopara viticola populations: implications for fungicide management in precision agriculture

Fungicides play a critical role in managing grapevine downy mildew caused by the oomycete Plasmopara viticola, a biotrophic and polycyclic pathogen with a high risk of fungicide resistance. Zoxamide, categorized as a low to medium resistance risk, disrupts cell division by inhibiting tubulin polymerization. Resistance to zoxamide is uncommon in field isolates. This six-year study (2017-2022) aimed to detect and quantify zoxamide sensitivity in P. viticola populations across varying resistance pressures in Italian grapevine regions. Analysis of 126 samples from 57 vineyards, mainly in North-Eastern Italy, revealed that most samples exhibited EC50, EC95, and MIC values below 0.1 and 10 mg/L of zoxamide, respectively. Nineteen vineyards showed reduced sensitivity (MIC>100 mg/L), but only four samples were characterized by 24-54% resistant oospores at >100 mg/L of zoxamide.

Optimization of in vitro establishment of grapevine varieties for fast micropropagation 

Micropropagation is an important alternative to conventional methods of plant propagation. The objective of this study was to optimize a protocol for in vitro micropropagation of selected grapevine hybrids (H19 and H20) that are included in our breeding program. For the sprouting initiation experiment, nodal cuttings with only one axillary bud from two hybrids were separated, disinfected, and cultivated in 50% Murashige Skoog nutrient medium (½ MS) and Woody Plant Medium (WPM), adding 4.4 µM benzyladenine (BA) in both mediums.

Time stability of visitors’ preferences for preserving the worldwide cultural landscape alto douro wine region

The Alto Douro Wine Region (ADWR) was classified a world heritage site, specifically as a cultural landscape, by UNESCO, in 2001. The well known “Porto Wine” and other high quality wines are produced in the Douro region. As an attraction and touristic site, the cultural site has to meet the needs of more demanding visitors and to compete with a growing number of cultural sites, also classified by UNESCO. To achieve this goal, landscape managers and public authorities have much to profit from knowing and understanding visitors’ preferences regarding the attributes associated to its outstanding universal value.

The effects of soil health management practices on soil organic carbon persistence and accrual in vineyards

Context and purpose of the study. Climate change is already threatening California vineyards, as they grapple with increasing extreme weather events and drier growing seasons.

Composition and molar mass distribution of different must and wine colloids

A major problem for winemakers is the formation of proteinaceous haze after bottling. Although the exact mechanisms remain unclear, this haze is formed by unfolding and agglomeration of grape proteins, being additionally influenced by numerous further factors.