Project number: Pathsol GP 22-02
Project leader: Pietersen, G
The aim of this project is to expand upon the list of red cultivars which can be tested visually only, by determining the correlation between ELISA tests and symptoms.
Project number: Pathsol GP 22-01
Project leader: Pietersen, G
Using Ramsey (Vitis champini, formerly Salt creek), researchers aim to identify grapevine leafroll associated virus type 3 (GLRaV-3) immune, and GLRaV-3 tolerant individuals of this rootstock.
Project Number: 11728
Project leader: Pietersen, G
Effective control of leafroll in commercial vineyards of red cultivars relies very heavily on visual detection of the disease in individual vines in autumn, prior to roguing...
Project Number: PPRI 16-27
Project leader: Pietersen, G
Grapevine leafroll associated virus 3 (GLRaV-3) does not produce symptoms and is generally considered to be poorly detected by ELISA and PCR in Vitis rootstocks. In...
Project Number: PPRI 13-16
Project leader: Jooste, A E C
Research worldwide and in South Africa, shows the existence of six clear molecular variants of GLRaV-3. The transmission dynamics of mixed variant infections in local...
Project Number: PPRI 16-02
Project leader: Pietersen, G
Determine whether vitivirus natural spread occurs independently of, and at different spatial rates than GLRaV-3, and whether mild virus-like...
Project Number: PPRI 11-19
Project leader: Pietersen, G
Within the South African Wine Grape Certification Scheme only few of the total range of viruses infecting Vitis world wide, and virus-like diseases of unknown etiology, are...
Project Number: GENUS 17-01
Project leader: Burger, J T
It is generally accepted that grapevine leafroll disease (GLD) has a negative impact on fruit and ultimately wine quality. Anecdotal evidence exists on the impact of GLD...
Project Number: GENUS 16-01
Project leader: Maree, H J
There are several anecdotal reports of symptomless plants appearing among symptomatic plants in severely grapevine leafroll-diseased vineyards of the Western...