TISSUE CULTURE LABORATORY - FITOTECHNIKI

Filothei
471 00 Arta - Greece

Phone + 30 26810 51.554
Fax + 30 26810 51.694

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GISELA


GISELA 5 (P.cerasus “Schattenmorelle”x P.canescens sp)

Hybrid of Prunus cerasus x Prunus canescens, obtained and selected by W. Gruppe and H. Schmidt at Justus Liebig University, Giessen (Germany). EU patent no. 1268/1996 held by the Consortium Deutscher Baumschulen GmbH, Germany. Trees in the nursery are moderately vigorous and have a spreading growth habit. Gisela 5 is recommended for cultivation on fertility and plants require careful soil and canopy management (irrigation, fertigation and a pruning system designed to stimulate new growth). The root system develops mostly in upper soil layers, with roots growing mainly horizontally. Anchorage in the ground is only moderate and trees need support. Suitable for high density cherry orchards and cultivation under cover . Good grafting results are obtained with summer budding of dormant buds (T or chip) as well as spring budding with growing buds or dormant buds (from the refrigerator). Winter grafting also gives good results, both in the field and by bench grafting. Trees grafted on Gisela 5 are less vigorous (60-80% less than those grafted on P. avium), though this depends on environmental conditions, orchard techniques and soil fertility. As a rule, tree vigour and productivity seem to decrease at lower latitudes. This rootstock is sensitive to root rot (Armillaria mellea) and collar rot (Phytophtora cactorum), and very sensitive to bacterial canker (Pseudomonas syringae) especially under humid conditions; susceptibility to crown gall (Agrobacterium tumefaciens) is very low. Trees start to bear very early and yield efficiency is high. Trees grafted on Gisela 5 need regular and careful pruning to balance productivity and plant vigour. High productivity can be maintained over many years with good orchard management. No suckering, excellent winter hardiness and very good compatibility.

GISELA 6 (P.cerasus “Schattenmorelle”x P.canescens sp)

Hybrid of Prunus cerasus x Prunus canescens, obtained and selected by W. Gruppe and H. Schmidt at Justus Liebig University, Giessen (Germany). EU patent no. 15835/2000 held by the Consortium Deutscher Baumschulen GmbH, Germany. Suitable for high density cherry orchards and cultivation under cover . Good grafting results are obtained with summer budding of dormant buds (T or chip) if trees are in good vegetative condition. Winter grafting also gives good results, both in the field and by bench grafting. Gisela 6 is less demanding than Gisela 5: it tolerates soils of poorer quality and less water supply and cultural management. Vigour is between those of Gisela 5 and P. avium . Despite vigorous growth in the early years (15-20% less than plants grafted on cherry seedlings), trees start to bear very early . In mature trees, vigour is 30-50% less than trees grafted on Prunus avium seedlings, depending on orchard management and soil fertility. This rootstock is sensitive to root rot (Armillaria mellea) and collar rot (Phytophtora cactorum) and very sensitive to bacterial canker (Pseudomonas syringae), especially under humid conditions; susceptibility to crown gall (Agrobacterium tumefaciens) is very low. High productivity can be maintained over many years if the orchard is well managed. Suitable for specialised, well-irrigated cherry orchards of high density (800-1200 trees/ha). No suckering, excellent winter hardiness and very good compatibility with sweet and sour cherry varieties.