Skip to main content

Advertisement

Table 6 Proportion of vineyard blocks surveyed that are infected with different viruses

From: Survey for major viruses in commercial Vitis vinifera wine grapes in Ontario

Viruses detected No. of vine blocks tested No. of positive blocks Percentage of positive blocks (%) No. of blocks in which all sample tested positive Percentage of blocks in which all sample tested positivea
GLRaV-3 137 94 68.6 36 38.3
GLRaV-2 137 16 11.7 1 6.3
GLRaV-1 137 12 8.8 0 0.0
GRBV 137 36 26.3 8 22.2
GPGV 137 62 45.3 5 8.1
GRSPaV 127 117 92.1 109 93.2
GVA 137 20 14.6 3 15.0
GVB 137 9 6.6 4 44.4
ToRSV 127 1 0.8 0 0.0
ArMV 127 1 0.8 0 0.0
GFkV 137 60 43.8 18 30.0
GRVFV 127 17 13.4 1 5.9
GAMaV 127 16 12.6 0 0.0
GSyV-1 127 7 5.5 0 0.0
  1. The full names of viruses that are included in this survey are provided in the abbreviations
  2. aThe percentage is obtained by the number of blocks, in which all the samples are positive for a given virus, divided by the number of positive blocks for the virus