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Effects of crop husbandry and growing conditions on storage losses of Pentland Crown potatoes

Published online by Cambridge University Press:  27 March 2009

S. J. Wilcockson ,
E. J. Allen ,
R. K. Scott  and
D. C. E. Wurr
S. J. Wilcockson
Affiliation:
University of Nottingham, School of Agriculture, Sutton Bonington, Loughborough, Leicestershire, LE12 5RD
E. J. Allen
Affiliation:
Department of Agriculture (Crop Husbandry), University College of Wales, Penglais, Aberystwyth, SY23 3DD
R. K. Scott
Affiliation:
University of Nottingham, School of Agriculture, Sutton Bonington, Loughborough, Leicestershire, LE12 5RD
D. C. E. Wurr
Affiliation:
National Vegetable Research Station, Wellesbourne, Warwick, CV35 9EF
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Summary

Over five growing seasons (1976–80) experiments were carried out using at least three contrasting sites per season to study the relationship between growing conditions and storage losses in Pentland Crown potatoes. Crops were harvested by hand and storage was carried out in a single environment over a period of 6–7 months without sprout suppressants. The range in growing conditions was great and reflected in the pattern of leaf growth and range in yields of the stored crops (30–90 t/ha). Crops from Tenby (S. W. Wales) produced the most consistent and frequently the highest yields and usually lost the least weight during storage. Although the range in total weight loss over all experiments was large from 5·4 to 16·3%, treatment effects were much smaller than in field growth and yield. Delaying the date of harvest usually increased weight loss and tubers harvested in early August stored at least as well as late-harvested tubers. Tubers harvested without prior defoliation stored as well as tubers harvested on the same day from crops defoliated at least 2 weeks previously. Lengthening the interval from defoliation to harvest usually increased weight loss in storage. Although the tubers were hand harvested effects on saleability were found at the end of storage and there was no evidence that earlier harvesting, which may involve some loss of field yield, would result in any loss of saleable yield out of store.

The results provided no evidence to support the widely-held view that the suitability of a tuber for harvesting improves during maturation associated with natural or imposed crop senescence. It is therefore suggested that the use of the term maturity be avoided as it is wholly unhelpful in studies of the relationship between field growth and storage losses in potatoes.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 105 , Issue 2 , October 1985 , pp. 413 - 435
Copyright
Copyright © Cambridge University Press 1985

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