Table 1.
Effect of rootstock and virus status on vine vigor (weight of pruning wood (g/vine)) on V. vinifera cv. Pinot noir over four consecutive years. GLD_S+: Grapevine leafroll disease causing mild symptoms; GLD_S++: grapevine leafroll disease causing severe symptoms. Means were denoted by different letters (a, b, and c) when they differ significantly at p < 0.05 using Ducan’s new multiple range test.
| 2015 | 2016 | 2017 | 2018 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rootsock | ||||||||||||||||
| Treatment | 5BB | % * | 3309C | % * | 5BB | % * | 3309C | % * | 5BB | % * | 3309C | % * | 5BB | % * | 3309C | % * |
| Symptomless | 460 a | 338 a | 480 a | 305 a | 391 a | 220 a | 540 a | 399 a | ||||||||
| GLD_+ | 403 a | −12 | 296 b | −12 | 380 b | −20 | 263 a | −13 | 295 b | −20 | 195 a | −12 | 490 a | −9 | 349 a | −12 |
| GLD_S++ | 199 b | −43 | 64 c | −81 | 211 c | −56 | 54 b | −83 | 159 c | −59 | 64 b | −62 | 205 b | −62 | 88 b | −78 |
* Percent decrease relative to symptomless control.