by Albert Strever | 1 Jun, 2018 | Viticulture research, Winetech Technical
A respectable grapevine yield, in combination with optimally ripe, quality fruit, is of paramount importance towards the goal of sustainable grape farming. Crop thinning is applied widely in the industry, due to a belief that a lower crop load will always lead to...
by Dariusz Goszczynski | Viticulture research, Winetech Technical
Grapevine leafroll (GLD) and Rugose wood (RW) are two diseases of great concern for grapevine industries worldwide. GLD causes degeneration of phloem cells, preventing the translocation of synthesised carbohydrates from the leaves. The disease delays maturation and...
by Johan Fourie | 1 May, 2018 | Viticulture research, Winetech Technical
Uncontrolled weeds may reduce crop yield by as much as 80%. Introduction Weeds that are difficult to control frequently do not depend on above-ground seeds alone to spread, but can also re-establish itself by means of rhizomes, tubers and subterraneous flowers...
by Philisiwe Augustine & Philip Olivier | 1 Apr, 2018 | Viticulture research, Winetech Technical
In wine production, it is important to know the best climate and soil type combination for each cultivar in order to get the best out of each terroir. Introduction While the role of climate as one of the important terroir attributes on wine style and quality is...
by Philisiwe Augustine, Kobus Conradie & Philip Olivier | Viticulture research, Winetech Technical
The effects of climate as one of the terroir attributes on wine style and quality are generally well understood, while there is much uncertainty concerning those of soil type. Introduction Researchers have reported that soil affects grape composition and...
by Hans Hugo & Rinus Knoetze | 1 Mar, 2018 | Viticulture research, Winetech Technical
Root-knot nematodes (Meloidogyne spp.) are common in South African vineyards and nursery soils, with M. javanica being the most common species. Soil fumigation and chemical control do not necessarily completely eradicate root-knot nematodes from the soil. Nurserymen...
by Hans Hugo & Rinus Knoetze | 1 Feb, 2018 | Viticulture research, Winetech Technical
The ring nematode, Criconemoides xenoplax, is one of the most common and abundant nematode species in vineyards throughout the Western Cape. Feeding by ring nematodes result in the destruction of grapevine root tissue and a stunted root system with relatively few live...
by Danie van Schalkwyk & André Schmidt | 1 Jan, 2018 | Viticulture research, Winetech Technical
This article is a follow-up on the articles regarding lesser-known red wine grape cultivars that were published (Van Schalkwyk & Schmidt, 2016a & 2016b). According to Sawis (2015) statistics, 101 different wine grape cultivars are planted in South Africa....
by Johan Fourie | Viticulture research, Winetech Technical
The objective of this study was to determine the effect of different weed management treatments on the stand of musk herons bill, one of the species that dominated the weed spectrum in the experiment vineyard, over the medium term. Introduction Musk herons bill...
by Albert Strever & Philip Myburgh | Viticulture research, Winetech Technical
Measurements of carbon isotope discrimination (CID) can be used to study the accumulative effects of strenuous environmental conditions on photosynthesis and gas exchange in the grapevine. Grapevine reaction to these environmental conditions is determined by observing...
by Albert Strever | 1 Dec, 2017 | Viticulture research, Winetech Technical
This article will outline three attempts to link grapevine water status to leaf or canopy-level spectral data in an attempt to find the wavelengths that are most suitable for designing possible instrumentation/sensors for monitoring the plant for irrigation scheduling...
by Johan Fourie | Viticulture research, Winetech Technical
The objective of the study was to determine the effect of different weed management treatments on the stand of wild radish (one of the species that dominated the weed spectrum in the experiment vineyard) over the medium term. Introduction Wild radish (Raphanus...
