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Control of pre- and postharvest factors to improve apple quality and storability

Tahir, Ibrahim (2006). Control of pre- and postharvest factors to improve apple quality and storability. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2006:35
ISBN 91-576-7084-6
[Doctoral thesis]

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Abstract

To increase apple production in Sweden and to improve apple quality and competitive edge on the market, solutions to negative problems such as bruising susceptibility, decay and weak storage potential have to be discovered. This thesis investigated problems relating to apple quality and storability, based on the results of field and laboratory experiments conducted in Kivik, Sweden, during a period of 12 years. Four cultivars (Aroma, Ingrid Marie, Cox’s Orange Pippin, and Katja) were predominantly used for the investigations. The cultivar Aroma showed the highest internal phenol content and was the most sensitive to bruising, followed by cv. Ingrid Marie. Enhancement of water loss and melting of skin wax by air pre-cooling or post-harvest heating decreased the incidence of bruising. A significant negative correlation between skin colour and bruise susceptibility was found in some cultivars. Decay caused by Pezicula malicorticis was the most difficult problem during storage, followed by decay due to Colletotrichum gloeosporioides and Penicillium expansum. Cvs. Aroma and Ingrid Marie were more susceptible to decay than Cox’s Orange Pippin and Katja. Post-harvest heating alone or in combination with ULO storage were possible alternatives to fungicides against these pathogens. Estimation of optimum nitrogen fertigation according to soil available nitrogen and fruit development phase not only increased tree yield but also improved fruit resistance to bruising and pathogens. Excess potassium increased yield and colouration, but declined fruit quality and storability. Aluminium foil or bark mulching improved fruit quality and increased storage potential. Apples from trees pruned in July or August showed a higher resistance to bruising and disorders and also better quality than apples from winter-pruned trees. Mulching and pruning solved the colouration problems present in cv. Aroma apples. Individual and twofold management models were not sufficient to improve the productivity of cv. Katja apples, whereas multi-practice management models improved yield, fruit quality and storability. The most positive effect was the reduction in quality decline during storage. The optimum harvest date was determined as the time when several fruit quality parameters changed similarly at a slow rate. ULO-stored apples (2% CO2 and 2% O2) showed less bruise sensitivity and decay, and also better quality than NA-stored apples. Fruit from young trees were less resistant to pathogens, had higher bruise sensitivity, showed better colouration and had a shorter storage life compared to fruit from older trees.

Authors/Creators:Tahir, Ibrahim
Title:Control of pre- and postharvest factors to improve apple quality and storability
Year of publishing :April 2006
Volume:2006:35
Number of Pages:63
Papers/manuscripts:
NumberReferences
ALLI. Ericsson, N-A. & Tahir, I.I. 1996. Studies on bruising: Estimation of incidence and susceptibility differences in the bruising of three apple cultivars. Acta Agric. Scand. Sect. B. Soil and plant Sci. 46; 209 – 213. II. Ericsson, N-A. & Tahir, I.I. 1996. Studies on bruising. The effect of fruit characteristics, harvest date and precooling on bruise susceptibility of three apple cultivars. Acta Agric. Scand. Sect. B. Soil and plant Sci. 46; 214 - 217. III. Tahir, I. I., Johansson, E. & Olsson, M. E. 2005. Groundcover materials improve quality and storability of ‘Aroma’ apples. HortScience 40 (5); 1416-1420. IV. Tahir, I. I., Johansson, E. & Olsson, M. E. 2005. Improving quality and storability of ‘Aroma’ apple by adjustment of some preharvest conditions. Submitted. V. Tahir, I. I., Johansson, E. & Olsson, M. E. 2005. Improving productivity, quality and storability of ‘Katja’ apple by better orchard management models. Submitted. VI. Tahir, I. I. & Ericsson, N.A. 2003. Effect of postharvest heating & CA-storage on storability and quality of apple cv. ‘Aroma”. Acta Hort. 600 (1); 127-134. VII. Tahir, I. I., Johansson, E. & Olsson, M. E. 2005. Prediction of optimum harvest date for some apple cultivars. Submitted.
Place of Publication:Alnarp
Associated Programs and Other Stakeholders:Z - SLU - Libray > Odla mera
ISBN for printed version:91-576-7084-6
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:malus pumila, penicillium expansum, pezicula, glomerella cingulata, mulching, pruning, fertigation, storage, quality, sweden
Keywords:Malus domestica Borkh, bruising, Penicillium expansum, Pezicula malicorticis, Colletotrichum gloeosporioides, mulching, pruning, fertigation, ULO storage, postharvest heating.
URN:NBN:urn:nbn:se:slu:epsilon-1010
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-1010
ID Code:1084
Department:?? 4806 ??
Deposited By: Ibrahim Tahir
Deposited On:18 Apr 2006 00:00
Metadata Last Modified:22 Mar 2015 15:11

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