Table 3.
Prevalence of major grape viruses in V. vinifera wine grapes in Ontario
| Viruses detected | Total no. of vine samples tested | No. of positive samples | Percentage of positive samples (%) |
|---|---|---|---|
| GRSPaV | 563 | 473 | 84.0 |
| GLRaV-3 | 657 | 315 | 47.9 |
| GFkV | 657 | 143 | 21.8 |
| GPGV | 657 | 142 | 21.6 |
| GRBV | 657 | 120 | 18.3 |
| GVA | 657 | 41 | 6.2 |
| GAMaV | 563 | 34 | 6.0 |
| GRVFV | 563 | 33 | 5.9 |
| GLRaV-2 | 657 | 29 | 4.4 |
| GVB | 657 | 20 | 3.0 |
| GLRaV-1 | 657 | 14 | 2.1 |
| GSyV-1 | 563 | 9 | 1.6 |
| ToRSV | 563 | 9 | 1.6 |
| ArMV | 563 | 1 | 0.2 |
The full names of viruses that are included in this survey are provided in the abbreviations