The goal of the 3 year-research was to compare 59 cvs, launched by the most important European breeders, under a low maintenance regime, particularly without winter pruning, watering, fertilization and disease control all over the trial period. The experiments was carried out on a 1.300 sqm area included in ‘Raffaele Bazzocchi’s Rose Collection’ and placed in Po Valley, near Bologna (Italy). The place is typified by 780-1000 mm yearly rainfall and, over all, by dried and warm summer (e.g. maximum T. = 44°C in 2003). Floriferousness, flower characteristics, flowering length and flushes, hip development, bottom break production, canopy height and diameter, cover ground surface and disease sensibility were yearly tested. Moreover, two index were established to define the cultivar worth: Index of covering (C.I. to set out plant colour effect at flowering maximum) and Index of ornamental value (O.I. to quantify the plant ornamental value all over the period from May to September). At the end of the third year, ‘Deborah’, ‘Rustica 91’, ‘Crimson Cherry’, ‘Scarlet Meidiland’ and ‘Pink La Sevillana’ resulted the tallest cultivars and ‘Snow Storm’ the most vigorous (plant surface = 1.64 sqm); further ‘Altair’, ‘Bonica 92’, ‘Flaming Star’, ‘Pearl Mirato’ and ‘Pink La Sevillana’ plants proved to be too irregular and outspread under hip weight and to require pruning. All cultivars have continuous or recurrent flowering but spring peak is ever the most important (flower number/plant) and the most eye-catching thanks brighter colours and larger flower diameter. I.C. and I.O values ranged from about 0.2 to 2.0 and from 10 to 50 respectively. Data are discussed among cultivars with the same flower colour. Petal-fall bent and common disease susceptibility are reported for each cultivar.

EVALUATION OF GROUNDCOVER ROSE CULTIVARS FOR LOW MAINTENANCE GARDENING AND LANDSCAPING.

GIORGIONI, MARIA EVA
2007

Abstract

The goal of the 3 year-research was to compare 59 cvs, launched by the most important European breeders, under a low maintenance regime, particularly without winter pruning, watering, fertilization and disease control all over the trial period. The experiments was carried out on a 1.300 sqm area included in ‘Raffaele Bazzocchi’s Rose Collection’ and placed in Po Valley, near Bologna (Italy). The place is typified by 780-1000 mm yearly rainfall and, over all, by dried and warm summer (e.g. maximum T. = 44°C in 2003). Floriferousness, flower characteristics, flowering length and flushes, hip development, bottom break production, canopy height and diameter, cover ground surface and disease sensibility were yearly tested. Moreover, two index were established to define the cultivar worth: Index of covering (C.I. to set out plant colour effect at flowering maximum) and Index of ornamental value (O.I. to quantify the plant ornamental value all over the period from May to September). At the end of the third year, ‘Deborah’, ‘Rustica 91’, ‘Crimson Cherry’, ‘Scarlet Meidiland’ and ‘Pink La Sevillana’ resulted the tallest cultivars and ‘Snow Storm’ the most vigorous (plant surface = 1.64 sqm); further ‘Altair’, ‘Bonica 92’, ‘Flaming Star’, ‘Pearl Mirato’ and ‘Pink La Sevillana’ plants proved to be too irregular and outspread under hip weight and to require pruning. All cultivars have continuous or recurrent flowering but spring peak is ever the most important (flower number/plant) and the most eye-catching thanks brighter colours and larger flower diameter. I.C. and I.O values ranged from about 0.2 to 2.0 and from 10 to 50 respectively. Data are discussed among cultivars with the same flower colour. Petal-fall bent and common disease susceptibility are reported for each cultivar.
2007
Acta Horticulturae
323
329
Giorgioni M.E.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/19144
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