• Colour and tannin management practices for red wines

    July 2016 /

    Seeing that skin contact is a standard practice of red wine making, the orderly management thereof is important to ensure that the colour and tannins of the eventual wine are balanced. Colour is mainly of visual importance, but tannins play a determining role in the taste of wine. A lack of tannins leads to thin, insipid wines, while an excess will cause unbalanced and excessive astringency. ...

  • Field application and persistence of EPNs to control Planococcus ficus on grapevine roots

    July 2016 /

    Planococcus ficus (the vine mealybug) is currently regarded as the dominant mealybug species, with it being a major pest insect of the South African table grape and wine industries. The most common method of mealybug control in South Africa is the use of such chemical insecticides as organophosphates. An alternative to using chemicals in controlling P. ficus is to use entomopathogenic nematodes (EPNs) within an integrated pest management (IPM) scheme. ...

  • Latest trends in barrel maturation

    July 2016 /

    As result of its nature, one of the most important problems experienced with wood barrels is the variation which exists between individual barrels. It is easy to specify physical properties like capacity, wood species, stave diameter, number and type of hoops, but factors like toasting degree and grain density are not easy to quantify and cooperages also differ with regard to their classification of different degrees. ...

  • Genetic test takes cholesterol and alcohol consumption into account

    July 2016 /

    Modern Western medicine made spectacular advances in the past millennium in the treatment of acute, life-threatening diseases presenting as medical or surgical emergencies. Most acute infections can be treated with modern antibiotics, and serious injuries and other surgical emergencies such as acute appendicitis, can effectively be treated with life-saving operations due to safe anaesthetics and sterile operating procedures.

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  • Guideline for energy management in the South African wine industry

    June 2016 /

    The South African wine industry has had an increased focus on energy efficiency, contributable to a number of drivers. ...

  • Interpretation of stem water potential measurements

    June 2016 /

    Water potential is useful for making decisions concerning the timing of irrigations to achieve specific yield and wine quality objectives. During the day, water lost by transpiration exceeds water absorbed by roots. Consequently, a water potential gradient develops in grapevines. At night, hardly any transpiration occurs and water deficits, or water constraints, that developed in the preceding day can be supplemented again. Therefore, water potential is highest just before dawn. ...

  • Planting of grapevines

    June 2016 /

    Jacques Ferreira provides guidelines for the planting of grapevines. ...

  • Aster yellows and leafhoppers

    June 2016 /

    In view of the fact that Aster yellows infects wine, table and raisin grapes, the disease poses a serious threat to the entire viticultural industry and especially the availability of clean plant material. ...

  • The minerality of wines

    June 2016 /

    Although sweet, acid, salt and bitter are the basic taste descriptors, the originality of copy writes has ensured that the back labels of wines sound like landscape, flower or garden descriptions. Many of these descriptions are meaningless or even misleading and actual wine descriptions are not used. ...

  • Precision application of ameliorants

    June 2016 /

    By using GIS technology, ameliorants may be applied more precisely within a block, which may achieve considerable benefits for precision viticulture and entail cost savings. ...

  • Bioremediation of winery wastewater – effects of aeration on microbial diversity

    June 2016 /

    In a previous trial Du Plessis et al. (2016) showed that bioreactors reduce chemical oxygen demand (COD) and improve clarity in turbid, high-COD winery wastewaters. Aeration for 120 minutes per day improved bioreactor efficiency. The effect of bioreactor aeration on microbial biodiversity is, however, not known. Bioreactors of the type used by Du Plessis et al. (2016) rely mainly on bacteria and fungi to break down waste products in the wastewater. ...

  • What is the SmartAgri project?

    May 2016 /

    The Western Cape government’s SmartAgri project recently reached a milestone with the completion of the Climate Change framework for the Western Cape agricultural sector. ...

  • The choice of bottle closures

    May 2016 /

    Winemakers are dedicated to make the best wines by using suitable quality grapes and applying the best winemaking practices with suitable cellar equipment. The entire process in the cellar is usually under their control and they must also bear the responsibility for it. ...

  • Financial indicators of top performing wine grape producers

    May 2016 /

    Primary wine grape producers use precision production practices to curb cost increases and realise a profitable crop despite an ongoing decrease in the area planted to wine grapes. ...