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Harvest maturity is generally recognized as one of the main factors determining duration of storage life and quality of fruit. Different fruit characteristics have been considered as indicators of optimum harvest date for long term storage. In an attempt to develop a more objective and generally valid method for the determination and prediction of optimum harvest date, it was agreed that similar experiments in different countries should be carried out to test the system proposed by Streif especially for Jonagold apples and Conference pears. This book reports on the fourth meeting on Optimum Harvest Date the aim of which was to reach conclusions with respect to the usefulness of the Streif-index and to identify future goals of the group. Main conclusions were: the change of Streif-index value with sampling and harvest date is characteristic for different cultivars; for the cultivar 'Jonagold' the curve representing the change of Streif index value with time can be described mathematically; index values associated with harvest data for long term storage are reasonably consistent and enable a prediction of optimum harvest date; this method is more reliable than methods based on only one fruit characteristic.

Additional information

Authors: DE JAGER A, Research Station for Fruit Growing, Wilhelminadorp (NL);JOHNSON D, Horticulture Research International, East Malling (GB);HÖHN E (EDITORS), Swiss Federal Research Station, Wädenswil (CH);HOHN E (EDITORS), Swiss Federal Research Station, Wadenswil (CH)
Bibliographic Reference: Report: EN (1995) 171pp., free of charge
Availability: Available from the European Commission, COST Secretariat, DG XII, 200 rue de la Loi, B-1049 Bruxelles (BE)
ISBN: ISBN 92-827-5427-8
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