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Organic apple production in Sweden

cultivation and cultivars

Jönsson, Åsa (2007). Organic apple production in Sweden. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2007:14
ISBN 91-576-7313-8
[Doctoral thesis]

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Abstract

Consumer interest in organically grown fruit appears to have increased considerably in recent years but the organic apple growing in Sweden cannot match the demand. One objective of this thesis was to study conversion of an orchard with 'Aroma' and 'Karin Schneider' from IFP to organic production. The accumulated yield for both cultivars was slightly lower in the organic sections compared to the IFP-grown sections, due mainly to a lower number of fruits while fruit size remained the same. In organic sections, 10% of the fruit was damaged by scab but less than 1% in the IFP sections. Aphids and NTG (noctuids, tortricids and geometrids) inflicted the highest amount of insect damage and this damage was higher in the organic sections. No major treatment effects were found in fruit covering colour, ground colour, firmness, sugar content or malic acid content. Two observation trials with apple scab-resistant cultivars and one with cultivars suitable for organic production of fruit for industrial use were also carried out. In Trial I, the most productive cultivars were 'Bio Golden' and 'Topaz', and in Trial II 'Vanda' and 'Scarlet O'Hara'. The fall-ripening 'Rubinola' and the late-ripening 'Scarlet O'Hara', which keeps well in storage, seem to be suitable for organic growing in our climate. 'Rajka' is interesting since it appears to be resistant against the rosy apple aphid. In Trial III with industrial cultivars, 'Blenheim Orange', 'Bramley', 'Holsteiner Cox', 'Ingbo', 'Queen' and 'Vanda' appear to be promising due to high levels of tree and fruit resistance to pests and diseases, and production of fruits suitable for processing. A consumer evaluation of scab-resistant apple cultivars was also performed. The consumers evaluated five cultivars each. Each cultivar was scored for appearance, texture, juiciness, taste and overall impression. All quality attributes were positively correlated when calculations were performed across all consumer scores, with overall impression and taste having the strongest association. 'Rubinola' and the Baslgård selection 'K:1160' emerged as the best liked cultivars overall. Minimum number of consumers needed to obtain reliable results was determined by computer simulations indicating that the variation became stabilized already with 50 consumers.

Authors/Creators:Jönsson, Åsa
Title:Organic apple production in Sweden
Subtitle:cultivation and cultivars
Year of publishing :2007
Volume:2007:14
Number of Pages:34
Papers/manuscripts:
NumberReferences
ALLI. Jönsson, Å. & Tahir, I. 2004. Evaluation of scab resistant apple cultivars in Sweden. Journal of Fruit and Ornamental Plant Research 12, 223-232. II. Tahir, I. & Jönsson, Å. 2005. Organic production of apple for industrial use. Acta Horticulturae 682, 723-730. III. Jönsson, Å. 2006. Insects and insect damage in an apple orchard converted from integrated production to organic production. Acta Agriculturae Scandinavica Section B, Soil and Plant Science 56, 70-80. IV. Jönsson, Å. & Nybom, H. 2007. Consumer evaluation of scab-resistant apple cultivars in Sweden. Agricultural and Food Science 15, 388-401. V. Jönsson, Å., Nybom, H. & Rumpunen, K. Fungal disease and fruit quality in an apple orchard converted from integrated production to organic production. (Manuscript).
Place of Publication:Alnarp
Associated Programs and Other Stakeholders:Z - SLU - Libray > Odla mera
ISBN for printed version:91-576-7313-8
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:apples, varieties, integrated plant production, alternative agriculture, plant diseases, disease resistance, agronomic characters, consumer surveys, sweden
Keywords:consumer evaluation, cultivar trial, fungal damage, insect pests, integrated fruit production, Malus, organic growing, scab resistant
URN:NBN:urn:nbn:se:slu:epsilon-1452
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-1452
ID Code:1338
Department:?? 4806 ??
Deposited By: Åsa Jönsson
Deposited On:06 Feb 2007 00:00
Metadata Last Modified:22 Mar 2015 15:10

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