TABLE 6.
Infected water (Cq) | Bait plants (no.)b | No. of positive plants/no. of all secondary plantsa |
|
---|---|---|---|
10 wks | 16 wks | ||
PSTVd (24 ± 1) | Potato tubers, cv. Hermes (4) | 0/1 | 0/4 |
Potato tubers, cv. Donald (4) | 0/2 | 3 (18–31)/6 | |
Potato tubers, cv. Nicola (4) | 0/3 | 2 (17–31)/5 | |
Negative control | Potato tubers, cv. Hermes (4) | 0/0 | 0/2 |
Potato tubers, cv. Donald (4) | 0/3 | 0/3 | |
Potato tubers, cv. Nicola (4) | 0/1 | 0/1 |
RT-qPCR was used for the detection. In parentheses are the ranges of mean Cq values (as the means of three replicates) for positive samples.
Infection was not confirmed in the green parts of bait plants.