Impact of shoot-thinning time on growth and yield components of Cabernet franc, 2001–2002.
| Yield (kg/vine) | Clusters/vine | Cluster wt (g) | Berries/cluster | Berry wt (g) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Treatment | 2001 | 2002 | 2001 | 2002 | 2001 | 2002 | 2001 | 2002 | 2001 | 2002 |
| Control | 3.3aa | 3.1a | 46a | 58a | 70.0cde | 51.9c | 61bcd | 44c | 1.16a | 1.17bc |
| Double prune | 2.7bcb | 2.0b | 43ab | 44b | 63.8de | 46.2c | 56d | 42c | 1.13b | 1.07d |
| 09–12 | 2.9abc | 2.9a | 36b | 40bc | 79.8b | 71.2a | 68b | 59a | 1.18a | 1.19ab |
| 15 | 3.0abc | 2.4b | 40ab | 34d | 77.6bc | 69.2a | 66bc | 61a | 1.16a | 1.14c |
| 19–21 | 3.2ab | 3.1a | 37b | 40bc | 89.7a | 75.4a | 75a | 60a | 1.19a | 1.23a |
| 25–27 | 2.6c | 2.3b | 40ab | 38c | 62.1e | 60.0b | 59cd | 51b | 1.05d | 1.20ab |
| 29–31 | 2.9abc | 2.1b | 40ab | 39bc | 71.7bcd | 52.1c | 66bc | 44c | 1.09c | 1.18bc |
| Significant Fc | * | **** | ** | **** | **** | **** | **** | **** | **** | **** |
| Thin linearc,d | ns | ***l | ns | ns | ns | ****l,***q | ns | ****l,**q | ***l,****q | ns |
| Control vs thinningc | ns | **** | ns | **** | * | ** | ns | *** | *** | ns |
| Shoots | Periderm (# canes per category) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wt of cane | ||||||||||||
| <3 mature | 4–9 mature | >10 mature | prunings | |||||||||
| Per vine | Per m row | internodes | internodes | internodes | (kg/vine) | |||||||
| Treatment | 2002 | 2001 | 2001 | 2002 | 2001 | 2002 | 2001 | 2002 | 2001 | 2002 | 2001 | 2002 |
| aMeans followed by different letters are significantly different, p ≤ 0.05, Duncan’s multiple range test. | ||||||||||||
| bBoldfaced data are significantly different from the control according to Dunnett’s t test. | ||||||||||||
| c*, **, ***, ****, and ns indicate significance at p ≤ 0.05, 0.01, 0.001, 0.0001, and not significant, respectively. | ||||||||||||
| dl, q: linear and quadratic trends, respectively. | ||||||||||||
| Control | 30aa | 36a | 21.7a | 26a | 5.6a | 7.5a | 14.5a | 14.9a | 10.3 | 13.6a | 0.30bc | 0.43a |
| Double prune | 27bb | 29b | 19.1b | 21b | 5.2a | 6.0b | 11.6b | 11.6b | 9.9 | 11.5bc | 0.30bc | 0.34bc |
| 09–12 | 23c | 25c | 16.7c | 17.7c | 3.4b | 3.4c | 8.9c | 8.6c | 11.2 | 12.8ab | 0.38a | 0.39ab |
| 15 | 24c | 20e | 17.3c | 14.3e | 3.6b | 2.5d | 9.9bc | 6.5d | 10.7 | 10.9c | 0.35ab | 0.30c |
| 19–21 | 23c | 22d | 16.6c | 15.8d | 3.6b | 3.4c | 9.7c | 7.0cd | 10.0 | 11.6bc | 0.35ab | 0.43a |
| 25–27 | 24c | 22d | 17.4c | 15.9d | 3.3b | 3.7c | 10.8bc | 8.1cd | 10.3 | 10.5c | 0.30bc | 0.28c |
| 29–31 | 23c | 22d | 16.8c | 16.0d | 3.2b | 3.9c | 10.0bc | 8.1cd | 10.2 | 10.4c | 0.26c | 0.30c |
| Significant Fc | **** | **** | **** | **** | **** | **** | **** | **** | ns | **** | ** | **** |
| Trendc,d | ns | ****q | ns | ****q | ns | **l | ns | **q | ns | ***l | **q | **l |
| Control vs thinningc | * | **** | * | **** | ns | **** | * | **** | ns | **** | ns | **** |