Articles
EVALUATION OF DIFFERENT APPLE HYBRIDS FOR RESISTANCE TO APHIDS (DYSAPHIS PLANTAGINEA PASS. AND APHIS POMI DE GEER) IN BULGARIA: PRELIMINARY RESULTS
Article number
767_45
Pages
403 – 410
Language
English
Abstract
During 2004-2006, the resistance of apple hybrids to green apple aphid, Aphis pomi de Geer, and rosy apple aphid, Dysaphis plantaginea Pass. was assessed.
Based on preliminary screening completed in 1998-2003, 19 hybrid combinations with a high resistance to scab and low susceptibility to powdery mildew and aphid infestations were selected for further evaluation. Golden Delicious was used as a susceptible reference cultivar.
Artificial infestation was carried out in two trials – in an unsprayed breeding orchard and on hybrid seedlings budded on M 26 rootstock, grown in pots.
Some hybrids of ‘Mollie’s Delicious’ × ‘Florina’, ‘Mollie’s Delicious’ × ‘Prima’, ‘Gloster’ × ‘Prima’ and some seedlings of ‘Florina’ open pollinated (o.p.) and ‘Liberty’ o.p. manifested resistance to D. plantaginea. Other hybrids of ‘Starkrimson’ × ‘Prima’, ‘Mollie’s Delicious’ × ‘Florina’, ‘Mollies Delicious’ × ‘Prima’, ‘Winter Rambour’ × ‘Priscilla’ as well as some hybrids of ‘Florina’ o.p. and ‘Liberty’ o.p. showed resistance to A. pomi. Combined resistance to both aphids has been found in the hybrids ‘Mollie’s Delicious’ × ‘Florina’, ‘Mollie’s Delicious’ × ‘Prima’ and in two hybrids of ‘Liberty’ o.p.
It was confirmed that ‘Florina’ and ‘Prima’ are good donors of resistance to the aphids under study.
Based on preliminary screening completed in 1998-2003, 19 hybrid combinations with a high resistance to scab and low susceptibility to powdery mildew and aphid infestations were selected for further evaluation. Golden Delicious was used as a susceptible reference cultivar.
Artificial infestation was carried out in two trials – in an unsprayed breeding orchard and on hybrid seedlings budded on M 26 rootstock, grown in pots.
Some hybrids of ‘Mollie’s Delicious’ × ‘Florina’, ‘Mollie’s Delicious’ × ‘Prima’, ‘Gloster’ × ‘Prima’ and some seedlings of ‘Florina’ open pollinated (o.p.) and ‘Liberty’ o.p. manifested resistance to D. plantaginea. Other hybrids of ‘Starkrimson’ × ‘Prima’, ‘Mollie’s Delicious’ × ‘Florina’, ‘Mollies Delicious’ × ‘Prima’, ‘Winter Rambour’ × ‘Priscilla’ as well as some hybrids of ‘Florina’ o.p. and ‘Liberty’ o.p. showed resistance to A. pomi. Combined resistance to both aphids has been found in the hybrids ‘Mollie’s Delicious’ × ‘Florina’, ‘Mollie’s Delicious’ × ‘Prima’ and in two hybrids of ‘Liberty’ o.p.
It was confirmed that ‘Florina’ and ‘Prima’ are good donors of resistance to the aphids under study.
Authors
H. Kutinkova, V. Dzhuvinov (Djouvinov)
Keywords
rosy-apple-aphid, green-apple aphid, scab-resistant, tolerance, breeding, Integrated-Pest-Management
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