Articles
EVALUATION OF ROOTSTOCK VVA-1 WITH THE PLUM CULTIVARS ‘OPAL’, ‘AVALON’ AND ‘EXCALIBUR’
Article number
577_50
Pages
295 – 297
Language
English
Abstract
In two rootstock trials the Russian rootstock VVA-1 was evaluated for use as a dwarfing plum rootstock under Dutch conditions.
From 1994 to 2000, a rootstock trial was carried out with Opal at the former Fruit Research Station in Wilhelminadorp.
Rootstock VVA-1 was compared with standard rootstock St Julien A. Planting distance was 4 x 2 m.
Four production years were registered.
Cumulative production per tree of St Julien A was 20.1 kg with 565 fruits, production of VVA-1 was 19.8 kg with 522 fruits.
Fruit weight was 39.2 and 38.8 g respectively.
The union of Opal on VVA-1 appeared to be good after cutting the trees.
In a second trial, planted in spring 1997 in Randwijk, VVA-1 is being compared with St Julien A both grafted with the cultivars Avalon and Excalibur. Planting distance was 3.5 x 2 m.
Flowering and production on VVA-1 were better than on St Julien A with both cultivars.
The flowers opened a few days earlier on St Julien A than on VVA-1. Production (kg/tree) and fruit weight (g) of Avalon and Excalibur on St Julien A were 1.7 and 53, and 1.0 and 76, respectively.
On VVA-1 these figures were 5.2 and 48 for Avalon and 5.3 and 72 for Excalibur. Shoot growth on VVA-1 was less than on St Julien A. The mineral content of the leaves was lower for P, K, Ca, Mg and Fe.
Until autumn 2001 no trees were lost.
From 1994 to 2000, a rootstock trial was carried out with Opal at the former Fruit Research Station in Wilhelminadorp.
Rootstock VVA-1 was compared with standard rootstock St Julien A. Planting distance was 4 x 2 m.
Four production years were registered.
Cumulative production per tree of St Julien A was 20.1 kg with 565 fruits, production of VVA-1 was 19.8 kg with 522 fruits.
Fruit weight was 39.2 and 38.8 g respectively.
The union of Opal on VVA-1 appeared to be good after cutting the trees.
In a second trial, planted in spring 1997 in Randwijk, VVA-1 is being compared with St Julien A both grafted with the cultivars Avalon and Excalibur. Planting distance was 3.5 x 2 m.
Flowering and production on VVA-1 were better than on St Julien A with both cultivars.
The flowers opened a few days earlier on St Julien A than on VVA-1. Production (kg/tree) and fruit weight (g) of Avalon and Excalibur on St Julien A were 1.7 and 53, and 1.0 and 76, respectively.
On VVA-1 these figures were 5.2 and 48 for Avalon and 5.3 and 72 for Excalibur. Shoot growth on VVA-1 was less than on St Julien A. The mineral content of the leaves was lower for P, K, Ca, Mg and Fe.
Until autumn 2001 no trees were lost.
Authors
J.M.T. Balkhoven-Baart, H. Kemp
Keywords
plum, prune, rootstock, VVA-1, ‘St Julien A’, Prunus domestica
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