Table 7.
Prevalence of major grape viruses in V. vinifera grapes based on period of vineyard establishment
| Year of Planting | No. of samples tested | GRSPaV | GLRaV-3 | GPGV | GRBV | GVA | GVB | GLRaV-2 | GLRaV-1 |
|---|---|---|---|---|---|---|---|---|---|
| 1974–1990 | 45 | 91.1 | 71.1 | 13.3 | 2.2 | 53.3 | 22.2 | 6.7 | 8.9 |
| 1991–2005 | 357 | 92.7 | 55.7 | 21.8 | 17.9 | 3.6 | 2.8 | 2.0 | 2.0 |
| 2006–2016 | 74 | 95.9 | 37.8 | 25.7 | 6.8 | 1.4 | 0.0 | 0.0 | 0.0 |
| Total | 476 | 443 | 259 | 103 | 70 | 44 | 20 | 10 | 11 |
The full names of viruses that are included in this survey are provided in the list of abbreviations
Shown are the percentages of samples tested positive for each virus over the total number of samples collected from grapevines planted in a specific period of years