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Crop Post-Harvest:
Science and Technology
Volume 1
Principles and Practice
Edited by
Peter Golob, Graham Farrell and John E. Orchard
Blackwell
Science
© 2002 Blackwell Science Ltd, a Blackwell Publishing
Company
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First published 2002 by Blackwell Science Ltd
Library of Congress
Cataloging-in-Publication Data
is available
ISBN 0-632-05723-8
A catalogue record for this title is available from the
British Library
Set in 9/11.5 pt Times
by Sparks Computer Solutions Ltd, Oxford
http://www.sparks.co.uk
Printed and bound in Great Britain by
Ashford Colour Press Ltd, Gosport, UK
For further information on
Blackwell Science, visit our website:
www.blackwell-science.com
This series of volumes is dedicated to the memory of
Dr Philip C. Spensley, Director of the Tropical Products Institute 1966–1982
for his leadership in a period of great expansion of post-harvest research and development
Part of a three-volume set from Blackwell Publishing and the Natural Resources Institute, University of Greenwich:
Crop Post-Harvest: Science and Technology Volume 1: Principles and Practice
Edited by P. Golob, G. Farrell and J.E. Orchard
0 632 05723 8
Crop Post-Harvest: Science and Technology Volume 2: Durables
Edited by R.J. Hodges and G. Farrell
0 632 05724 6
Crop Post-Harvest: Science and Technology Volume 3: Perishables
Edited by D. Rees, J.E. Orchard and G. Farrell
0 632 05725 4
v
Contents
Contributors ix
Foreword by Professor Chris Haines xi
Preface xiii
1 Post-Harvest Systems in Agriculture 1
F. Goletti and E. Samman
2 Biology of Plant Commodities 35
D. Rees and L. Hammond
3 Physical Factors in Post-Harvest Quality 69
A.D. Devereau
Properties of stored products 69
A.D. Devereau
The principal physical factors 74
A,D. Devereau
Water 77
R. Myhara
Measurement of physical factors 83
A.D. Devereau
Moisture content 84
C. Anderson
4 Biological Factors in Post-Harvest Quality 93
G. Farrell
Post-harvest pests and the damage they cause 93
G. Farrell
Pests of durable crops – insects and arachnids 94
R.J. Hodges
Pests of durable crops – vertebrates 112
A.N. Meyer and S. R. Belmain
Pests of durable crops – moulds 120
P.W. Wareing
Contentsvi
Diseases and pests of perishable crops 131
G. Farrell
5 Technology and Management of Storage 141
R.A. Boxall
Storage losses 143
R.A. Boxall
Storage structures 169
R.A. Boxall
Storage of horticultural produce 176
S.J. Taylor and R.D, Bancroft
Selection of stores for durable commodities 191
R.A. Boxall
Small-scale farm storage in the developing world 192
J.R. Brice
Transit or trader storage 200
R.A. Boxall
Medium and large-scale storage 200
R.A. Boxall
Storage management 204
R.A. Boxall
6 Pest Management 233
P. Golob
Safety 234
P. Golob
Insect control 242
L.A. Birkinshaw
Inert dusts 270
T.E. Stathers
Botanicals 280
S.R. Belmain
Rodent control 284
A.N. Meyer and S.R. Belmain
Bird control 295
S.R. Belmain and A.N. Meyer
Moulds and bacteria 299
G. Farrell
Approaches to pest management in stored grain 301
R.J. Hodges
7 Remedial Treatments in Pest Management 321
R.W.D. Taylor and P. Golob
Fumigation 321
R.W.D. Taylor
Contents vii
Radiation disinfestation 338
A. D. Devereau
Other methods of disinfestation and protection 342
P. Golob
8 Food Processing and Preservation 360
A.A. Swetman
Food preservation 360
L. Nicolaides and P.W. Wareing
Packaging 372
J.H. New
Flour 379
J.F. Wood
Oilseeds, oils and fats 386
A.A. Swetman
Weaning foods 396
L. Hammond
Animal feeds 401
J.F. Wood
9 Food Systems 423
P.S. Hindmarsh
Access to food 423
P.S. Hindmarsh
Credit and storage 424
P.S. Hindmarsh
The case for food security reserves 427
P.S. Hindmarsh
Market access 431
H.M. Kindness and A.E. Gordon
Seed security 434
D.J. Walker
Food aid 437
D.J. Walker
10 Applied Research and Dissemination 441
H.C. Coote and N.K. Marsland
Extension methods and technology transfer in less developed countries 441
H.C. Coote
Farmer participation in assessing post-harvest needs 447
N.K. Marsland
A methodological framework for combining quantitative and qualitative survey methods 448
N.K. Marsland, I.M. Wilson, S. Abeyasekera and U.K. Kleih
Monitoring investment and the evaluation of impact 457
N.K. Marsland, I.M. Wilson, S. Abeyasekera and U.K. Kleih
Contentsviii
The impact of post-harvest research on household food security 460
N.K. Marsland, I.M. Wilson, S. Abeyasekera and U.K. Kleih
11 Trade and International Agreements 464
P. Greenhalgh and J.A. Conway
The WTO and other international and regional organisations 465
P. Greenhalgh
International commodity agreements 470
P. Greenhalgh
Trade associations 471
P. Greenhalgh
Commercial practices 472
J.A. Conway
Ethical trade 476
M.E. Blowfi eld
Phytosanitary agreements, requirements and standards 482
R. Black
Food safety and HACCP 502
L. Nicolaides
Glossary 511
Appendix 1: Some Important Post-harvest Pests 521
Appendix 2: Some Important Post-harvest Pathogens 539
Appendix 3: Some Plants of Post-harvest Concern 545
Index 548
ix
Contributors
Roger D. Bancroft, Steven R. Belmain, Lucy A. Bir-
kinshaw, Robert Black, Mick E. Blowfi eld, Robin A.
Boxall, John R. Brice, John A. Conway, H. Claire Coote,
Andrew D. Devereau, Graham Farrell, Peter Golob, Ann
E. Gordon, Peter Greenhalgh, Lynda Hammond, Paul S.
Hindmarsh, Richard J. Hodges, Heather M. Kindness,
Ulrich K. Kleih, Neil K. Marsland, Adrian N. Meyer,
Linda Nicolaides, John E. Orchard, Deborah Rees,
Tanya E. Stathers, Anthony A. Swetman, Robert W.D.
Taylor, Sarah J. Taylor, David J. Walker, Peter W. Ware-
ing, John F. Wood: at the time of writing, all on the staff
of the Natural Resources Institute, University of Green-
wich, Chatham ME4 4TB, UK.
Savitri Abeyasakera, University of Reading, Reading
RG6 6AH, UK.
Campbell Anderson, Campden and Chorleywood Food
Research Association, Chipping Campden GL55
6LD, UK.
Francesco Goletti, President, Agrifood Consulting In-
ternational, 2715 Harmon Road, Silver Spring, MD
20902, USA.
Adrian N. Meyer, The Acheta Partnership, Garden Cottage,
Horsemoor, Chieveley, Newbury RG20 8XD, UK.
Robert Myhara, Food Industry Consultant, 12-5 Cheryl
Road, Ottawa, Ontario, Canada K2G-0V5.
John H. New, Stubbings, Weavering Street, Maidstone
ME14 5JH, UK.
Emma Samman, St Antony’s College, Oxford OX2 6JF,
UK.
Ian M. Wilson, University of Reading, Reading RG6
6AH, UK.
xi
Foreword
by technological and economic improvements in com-
modity marketing, processing, packaging, storage and
distribution, that is, by actions to reduce losses and to
add value and quality across the post-harvest (or post-
production) sector.
Public concern about food safety and quality is in-
creasing both in industrialised countries and in urban
centres in the developing world. This has been fuelled
by long-term anxieties about pesticides and other con-
taminants in food, by growing awareness of the preva-
lence of food-borne disease, by the media profi le of spe-
cifi c ‘food scares’, and by the impact of globalisation on
quality management in international trade. While some
elements of food safety and quality have their origins in
the pre-harvest sector, many of the problems occur or
develop post-harvest, and food quality management falls
squarely in the post-harvest sector, whatever the origin
of the problem.
In spite of its importance to food security, food safety
and food quality, the post-harvest sector has long been
the poor relation of agricultural development. One possi-
ble reason for this is that many of its proponents have fo-
cused exclusively on their specifi c commodity sub-sec-
tors, with separation of teams working on grains, roots
and tubers, tree crops, oilseeds, fruit and vegetables. In
recent years there has been greater convergence and in-
teraction of these sub-sectors, and thus the development
of cross-commodity post-harvest sectoral thinking. This
three-volume series brings together the results of these
interactions for the fi rst time in what should become the
standard text on post-harvest technology.
Chris Haines
Professor of Post-Harvest Technology
Natural Resources Institute
University of Greenwich
In our world of six billion people, almost 800 million
are hungry or starving, a quarter of whom are children
under fi ve years old. More than an eighth of all humans,
or one-sixth of the developing world’s population,
are chronically food-insecure and do not have access
to suffi cient safe food at all times to lead healthy, ac-
tive, productive lives. Food insecurity brings with it
the vicious cycles of incapacity to work, increased
susceptibility to communicable disease, permanent
debilitation from childhood malnutrition, withdrawal
from education, and social or political exclusion – and,
ultimately, starvation. Yet all authorities agree that,
globally, humankind harvests suffi cient food to meet
the needs of all, and most analysts believe that produc-
tion trends will continue to keep ahead of demand in
the medium-term future. In many parts of the world,
yield productivity has increased dramatically in recent
decades due in part to changes in agronomic practice
and, especially, to the improved crop varieties arising
from international investment in the Green Revolution.
Nevertheless, vast numbers of people are malnourished,
notably in sub-Saharan Africa where one in three people
are food-insecure.
Efforts to improve harvest yield and quality continue
apace, including contentious research on biotechnology
and genetic modifi cation in plant and animal breed-
ing. Increasingly, however, international attention in
agricultural development is focused on issues, not of
food production per se, but of people’s access to safe
and nutritious food, which is compromised – and not
just in developing countries – by poverty, war or civil
insecurity, social or political exclusion, ignorance, ill-
health, ineffective markets, and inadequate food quality
management. Self-evidently, several of these constraints
to access are only amenable to social and political solu-
tions. However, many barriers to access could be solved
[...]... 19 98 19 80 2.0 1. 5 1. 6 1. 2 1. 9 2.7 1. 7 1. 4 1. 6 1. 1 1. 3 2.0 1. 9 1. 4 1. 2 1. 3 1. 5 1. 1 1. 2 All agroprocessing 19 98 19 80 19 98 19 80 19 98 19 80 19 98 3 .1 3 .1 4.9 4.8 1. 2 1. 1 34.6 26.8 1. 5 0.7 1. 0 1. 4 2.8 2.4 4.7 1. 8 3 .1 2.8 3.4 2 .1 4.0 6.4 7.2 0.4 4.2 6.5 4.8 1. 1 1. 2 1. 4 0.9 1. 4 1. 3 1. 3 0.9 1. 3 32 .1 33 .1 36.4 41. 6 29.5 24.9 23.5 31. 7 1. 4 0.7 2.2 2.3 2 .1 2.2 1. 5 1. 7 42.0 34.9 0.6 1. 2 0.7 2.3 2.5 2.2 2.4 1. 6 1. 7... 5.0 22 .1 10.6 12 .7 13 .0 17 .2 14 .5 14 .2 22.3 24.4 18 .6 17 .9 29.3 22.6 14 .0 21. 2 21. 7 26.0 12 .0 10 .3 13 .1 8.4 19 .4 28.9 35.0 36.0 17 .6 14 .5 23.9 16 .3 5.5 14 .0 7.9 5.8 3.4 17 .9 2.6 11 .6 3.5 18 .9 3.4 11 .7 5.9 7.6 5 .1 6 .1 2.5 11 .3 3.8 9.5 14 .5 20.0 20.7 27.9 26.3 40.9 21. 9 32 .1 18.5 26.5 23.3 31. 6 25.9 30.3 10 .4 11 .8 9.6 12 .3 15 .1 21. 3 12 .9 7 .1 10.6 9.6 14 .8 14 .1 27.9 8.7 14 .4 7.6 15 .3 8.0 12 .5 8.3 10 .0 5.5... apparel Leather and fur Footwear 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 9.9 8 .1 2.2 1. 8 1. 4 1. 0 4.7 2.4 2.6 1. 3 0.4 0.2 0.6 0.3 8.0 9.5 10 .0 16 .5 8.9 7.9 6.5 13 .3 2.2 1. 6 1. 9 3.3 2.3 1. 1 1. 2 4.7 1. 6 0.3 2.2 1. 0 1. 3 0.2 1. 0 1. 4 4.3 4.9 3.2 9.3 3 .1 1.9 2.0 2.2 2.8 2.0 2.7 3.3 1. 4 1. 2 1. 2 1. 5 0.5 0.3 0.3 1. 0 0.3 0 .1 0 .1 0.2 0.9 0.2 0.4 0.9 0.5 0 .1 0 .1 0.5 11 .2 10 .2 3.7 3.6 3.5 3.4 8.6 6.2... 3 .11 and 3 .12 Sum of countries’ contributions is 74% (of developing countries’ total production) Colombia 2% Indonesia 10 % Argentina 14 % Brazil 17 % 6 Table 1. 3 Crop Post-Harvest: Science and Technology Distribution of world value-added by branch of agroindustry, 19 80 and 19 98 Source: UNIDO 2000 Branch Year Food 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98... manufacturing, 19 90–95 Notes: 1 Australia (19 90); Austria (19 90–94); Canada (19 90– 91) ; Denmark (19 90–92); West Germany (19 90); Ireland (19 90– 91) ; Italy (19 91 94); New Zealand (19 90–93); Portugal (19 90–95); Sweden (19 90); United Kingdom (19 90, 19 92, 19 95); United States (19 92–95) 2 Indonesia (19 93–96); Korea (19 90–95); Malaysia (19 90–95); Philippines (19 92–95); Taiwan (19 92–96); Thailand (19 90– 91, 19 93–94)... Argentina (19 94); Chile (19 90–95); Colombia (19 91, 19 93–94); El Salvador (19 93–96); Panama (19 90) 4 Algeria (19 90–92); Egypt (19 91 94); Morocco (19 92–96) 5 Angola (19 92–93); Ethiopia (19 91 96); Kenya (19 90–93); Nigeria (19 91 92); Tanzania (19 90– 91) 6 Bangladesh (19 90–92); India (19 93–94); Sri Lanka (19 90–93) Source: UNIDO ISIC-3 digit dataset, 19 99 12 Crop Post-Harvest: Science and Technology 45 38. 71 40... 55 .1 41. 1 39.0 28 .1 44.6 59.4 54.2 30.0 21. 4 55.0 44.8 58.3 43.5 11 .8 8.5 10 .1 13.9 15 .3 14 .1 17.2 12 .0 10 .8 9.7 12 .3 8.8 6.7 10 .7 12 .4 13 .1 11. 8 12 .9 9 .1 8.0 9.7 10 .3 5.0 5.4 5.3 3.9 2.2 2.9 2.7 2.9 1. 3 0.6 3.2 4.8 3.9 3.5 3.7 responsible for close to half the supply of goods such as man-made fabric and footwear Developed countries account for the overwhelming majority of processed food imports: in 19 92,... 28.0 33 .1 32.6 35.3 33.7 29.2 29.3 32.6 34.2 29.3 34.6 43.6 42 .1 47.0 33.5 36.3 33 .1 32.9 36.3 33.6 35.7 7.4 9.4 11 .1 13 .1 12.2 13 .0 13 .2 17 .7 10 .9 11 .2 15 .3 19 .1 17.6 20.3 4.9 3.9 6.3 8.0 10 .1 12.8 8.2 See notes to Table 1. 1 Totals do not equal 10 0 because non-EU countries in Western Europe are not included Table 1. 4 Distribution of value-added among developing regions Latin America Africa South and East... manufacturing 1. 3 0.8 0.4 –0.9 1. 4 –2.9 –2.4 0.7 0.3 1. 8 1. 1 2.4 1. 6 19 80–90 19 90–98 Industrialised countries 1. 7 1. 4 0.7 1. 1 1. 7 0 2.4 2.2 3.0 1. 2 2.9 1. 6 2.6 19 80–90 19 90–98 Eastern Europe & CIS 2.4 2.4 1. 7 2.5 2.6 0.8 –0.6 2.0 –0.3 4.5 3.2 5.2 5 .1 4 .1 4.2 4.2 6.7 3.8 4.2 5.7 1. 3 –0.3 1. 5 –2.8 19 80–90 19 90–98 Developing countries 4.0 3.6 3.9 2.7 4.3 2.8 3 .1 1.9 0.7 –3.5 –3.4 –3.3 2.9 3.4 2.9 6.5 5.5 0.5 1. 9... 7 .1 3.0 1. 8 2.7 4.4 7.6 4.7 8.4 6.7 3 .1 6.9 7.5 19 80–90 19 90–98 19 80–90 19 90–98 2.8 2.5 1. 6 2 .1 2.2 2.0 0.6 1. 0 2.5 5.0 4.4 2nd generation NICs NICs Annual growth of value-added in agroindustry by selected groups, 19 80–90 and 19 90–98 Source: UNIDO 2000 Branch Table 1. 2 3.2 1. 2 2.4 3.9 3.3 3.2 1. 5 1. 6 1. 5 0.9 0.7 19 80–90 19 90–98 Other developing countries 2.2 2.3 4 Crop Post-Harvest: Science and Technology . agroprocessing 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 19 80 19 98 Industrialised 2.0 1. 5 1. 6 1. 2 3 .1 3 .1 4.9 4.8 1. 2 1. 1 34.6 26.8 countries European Union 1. 9 1. 6 1. 9 1. 5 2.8 3 .1 4.0 4.2 1. 2 1. 3. apparel 19 80 81. 5 34.2 11 .1 21. 7 11 .6 18 .5 10 .9 7.6 19 98 73.5 29.3 11 .5 26.0 3.5 26.5 11 .2 15 .3 Leather 19 80 76.7 34.6 9.9 12 .0 18 .9 23.3 15 .3 8.0 19 98 68.4 43.6 8.6 10 .3 3.4 31. 6 19 .1 12.5 Footwear. Food 19 80 85.5 28.0 14 .8 22.3 16 .3 14 .5 7.4 7 .1 19 98 80 .1 33 .1 12.9 24.4 5.5 20.0 9.4 10 .6 Beverages 19 80 79.3 32.6 10 .4 18 .6 14 .0 20.7 11 .1 9.6 19 98 72 .1 35.3 7 .1 17.9 7.9 27.9 13 .1 14.8 Tobacco
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