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Project number: P04000060-2019
Project leader: Burger, P
The aim of this project is to screen and phenotype new Pinotage plants that were generated in a pilot study that focused on developing methods
to induce mutations. The intention is that the mutations could lead to potentially novel clones.
Project number: FShip Clim
Project leader: Southey, T O
Terraclim is funded by Winetech and is an online spatial decision-support system specifically created for the wine industry. Built on a strong foundation of research and development, it will provide producers with climate and terrain information all the way down to farm and field level. With Terraclim, producers will also be given the necessary tools to allow them to adapt long- and short-term management strategies to mitigate the effects of climate change.
Project number: P04000236
Project leader: Halleen, F
The objective of this research project is to study the effect of mechanical pruning (MP) on the incidence and severity of grapevine foliar, fruit and trunk diseases compared to conventional pruning. Locally, a lot of research has been done on MP however, the effect on the incidence and severity of major leaf, fruit and trunk diseases, especially the long-term effect in terms of sustainable production, is unknown.
Project number: P04000235
Project leader: Halleen, F
The aim of this project is to identify factors that may reduce or shorten the productive lifespan of rootstock mother blocks. In this study, physical, physiological and pathogenic detail will be considered on the same mother material. This approach has not been followed before and may provide answers that are hitherto unknown.
Project number: FShip Water 2
Project leader: Lategan, E
The objective of this study is to develop guidelines based on grapevine water status for wine grape irrigation. In order to apply the minimum irrigation requirement, sound irrigation scheduling practices are essential. This project will be conducted in the form of demo plots in established commercial vineyards, in three climatically different areas (Stellenbosch, Breedekloof and Olifants River). Irrigation scheduling will be done based on plant water potential values based on previous research and compared to the grower’s normal scheduling practice.
Project number: FShip Water 1
Project leader: Poblete-Echeverría, C
The main objective of this sub-project is to implement a research site where multiple technologies will be integrated and tested for monitoring the most significant components of the soil-vine-atmosphere continuum (Integrated Vineyard Monitoring System – IVMS).
IVMS is an essential part of the broader research programme that will focus on water management to ensure sustainable, profitable and quality products in the context of the potential impacts of climate change.
Project number: TERRACLIM 2017
Project leader: Southey, T O
The online spatial decision support system (SDSS) for a selected test area in the Western Cape
was created to address the problem highlighted by researchers, consultants and farmers, that
there is a need for easier accessibility to data in the agriculture domain, to aid long and short term
decision making in the context of climate change. As a pilot study, the goal of this project was to test the fundamental workflow and design of an online SDSS, and provide an indication of the feasibility, time and cost for a wider-scale project.
Project number: DVO VAC 04
Project leader: Carey, V A
The main objectives of this project were to:
1. Inventory all available viticultural measurements and associated climatic and soil data from past and current research projects and individual cellar data management systems as well as wine show results and associated climate and soil data.
2. Compile a database of data accumulated
3. Identify gaps in data
4. Develop a statistical site selection model.
Project number: US PP 07 2006
Project leader: Fourie, P H
During 2005 and 2006 samples of rootstock cuttings were collected during the period of harvesting and preparation of rootstock cuttings. These samples were examined for any external and internal symptoms. Isolations, from observed internal symptoms, were made onto PDA. Fungi isolated at the highest frequency from these symptoms were Botryosphaeriaceae and Phomopsis spp., with Phaeoacremonium spp. and Phaeomoniella chlamydospora isolated at much lower frequencies. These genera have all been shown to be important grapevine trunk pathogens, infecting pruning wounds and other mechanical wounds, ultimately causing decline and dieback of nursery and mature grapevines. Some isolates, representing Phoma and Acremonium spp., were also isolated, although these are not recognised as grapevine pathogens. Management strategies aimed at preventing wound infection of rootstock canes by above mentioned pathogens are recommended. These include treatment of pruning wounds on mother vines with pruning wound protecting agents, trellising of mother vines to prevent injury of the rootstock canes and careful inspection and selection of canes prior to grafting.
Project number: US E/A A4
Project leader: Addison, P
Vine mealybug (VMB) continues to be a key pest in South African vineyards. Biological control is important for this pest but is not adequate for economic control. Possible reasons for the lack of control could be the field effect of field sprayed pesticides on fecundity, and host searching ability. Laboratory trials were previously done and these trials indicated a negative impact on parasitoids. This impact may be either magnified or minimized under field conditions, but this information is not currently available. Trials previously done also did not include Anagyrus pseudococci and information on these biologically important parasitoids could be useful when making decisions regarding chemical interventions.
Project number: US E/A A3
Project leader: Addison, P
Vine mealybug (VMB) continues to be a key pest in South African vineyards. Biological control is important for this pest but is not adequate for economic control. An additional biological control agent is needed for mass releases on vine mealybug and Anagyrus pseudococci was identified as one of the most important parasitoids biologically controlling this pest. Basic information on the developmental biology was lacking and was needed in order to understand the importance of this parasitoid, in order to optimize rearing and release methodology.
Project number: US E/A A2
Project leader: Addison, P
The aim of this project was to correlate ant infestation with vine mealybug infestation and mealybug parasitism in three main vine-growing areas of the Western Cape. The ultimate objective of the project was to provide an action threshold, which will enable producers to decide when to implement chemical control against ants.
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