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Lost Crops of Africa: Volume II: Vegetables http://www.nap.edu/catalog/11763.html THE NATIONAL ACADEMIES PRESS 500 Fifth Street, N.W. Washington, DC 20001 NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance. Program and staff costs for this study came from the U.S. Agency for International Development, specifically USAID’s Bureau for Africa with additional support from the Office of U.S. Foreign Disaster Assistance. Additional funding was received from the Presidents Committee of the National Academies. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the organizations or agencies that provided support for the project. International Standard Book Number-10 0-309-10333-9 (Book) International Standard Book Number-13 978-0-309-10333-6 (Book) International Stardard Book Number-10 0-309-66582-5 (PDF) International Standard Book Number-13 978-0-309-66582-7 (PDF) Library of Congress Catalog Card Number 93-86876 Additional copies of this report are available from the National Academies Press, 500 Fifth Street, N.W., Lockbox 285, Washington, DC 20055; (800) 624-6242 or (202) 334- 3313 (in the Washington metropolitan area); Internet, http://www.nap.edu Copyright 2006 by the National Academy of Sciences. All rights reserved. Printed in the United States of America Copyright © National Academy of Sciences. All rights reserved. Lost Crops of Africa: Volume II: Vegetables http://www.nap.edu/catalog/11763.html The National Academy of Sciences is a private, nonprofit, self-perpetuating society of distinguished scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal government on scientific and technical matters. Dr. Ralph J. Cicerone is president of the National Academy of Sciences. The National Academy of Engineering was established in 1964, under the charter of the National Academy of Sciences, as a parallel organization of outstanding engineers. It is autonomous in its administration and in the selection of its members, sharing with the National Academy of Sciences the responsibility for advising the federal government. 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TheNational Research Council was organized by the National Academy of Sciences in 1916 to associate the broad community of science and technology with the Academy’s purposes of furthering knowledge and advising the federal government. Functioning in accordance with general policies determined by the Academy, the Council has become the principal operating agency of both the National Academy of Sciences and the National Academy of Engineering in providing services to the government, the public, and the scientific and engineering communities. The Council is administered jointly by both Academies and the Institute of Medicine. Dr. Ralph J. Cicerone and Dr. Wm. A. Wulf are chair and vice chair, respectively, of the National Research Council. www.national-academies.org Copyright © National Academy of Sciences. All rights reserved. Lost Crops of Africa: Volume II: Vegetables http://www.nap.edu/catalog/11763.html Copyright © National Academy of Sciences. All rights reserved. Lost Crops of Africa: Volume II: Vegetables http://www.nap.edu/catalog/11763.html PANELON AFRICAN FRUITS AND VEGETABLES NORMAN BORLAUG, Chair, Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT), Mexico City, Mexico ANTHONY CUNNINGHAM, School for Environmental Research, Charles Darwin University, Darwin, Australia JANE I. GUYER, Department of Anthropology, Johns Hopkins University, Baltimore, Maryland, USA HANSHERREN, Millennium Institute, Arlington, Virginia, USA CALESTOUS JUMA, John F. Kennedy School of Government, Harvard University, Cambridge, Massachusetts, USA AKINLAWON MABOGUNJE, Development Policy Centre (retired), Ibadan, Nigeria BARBARA UNDERWOOD, National Eye Institute (retired), Sun City, California, USA MONTAGUE YUDELMAN, Woodrow Wilson Visiting Fellow, Washington, DC, USA PROGRAM STAFF MARKDAFFORN,Study Director NOELD.VIETMEYER,Consulting Author and Scientific Editor F.R.RUSKIN,Editor (through 1994) ELIZABETHMOUZON,Senior Secretary (through 1994) BRENTSIMPSON,MUCIA Intern (1994) DONOSBORN,MUCIA Intern (1993) MOLLYMUGNOLO,MUCIA Intern (1992) v Copyright © National Academy of Sciences. All rights reserved. Lost Crops of Africa: Volume II: Vegetables http://www.nap.edu/catalog/11763.html CONTRIBUTORS When the idea for a project on native African food plants was first mooted, more than 1,000 people nominated their favorite grains, fruits, nuts, vegetables, legumes, and other plants. All told, over 100 species were suggested for inclusion. Indeed, the numbers and the enthusiasm were so high that we decided to produce separate volumes on grains, vegetables, and fruits. We certainly are grateful to all who helped launch the program, but the following are the ones who especially provided the technical details and insights that created the chapters of this particular book. AFRICA DOSSOU FIRMIN ADJAHOSSOU, Faculte des Sciences Agronomiques; Universite Nationale du Benin, Cotonou, Benin JAMESALLEMANN, Agricultural Research Council, Pretoria, South Africa PAUL O. ANEGBEH, ICRAF-IITA-IFAD Agroforestry Project, International Institute of Tropical Agriculture, Onne, Nigeria D.J.M. ANNEROSE, Laboratoire de Physiologie de l’Adaptation a la Secheresse, Bambey, Senegal BEATRICE ANYANGO, Department of Botany, University of Nairobi, Nairobi, Kenya ASIAN VEGETABLERESEARCH CENTER, Duluti, Arusha, Tanzania KINGSLEY AYISI, Department of Plant Production, University of the North, Sovenga, South Africa SUNDAYP.BAKO, Department of Biological Sciences, Ahmadu Bello University, Zaria, Samaru, Nigeria JULESBAYALA, INERA/DPF, Ouagadougou, Burkina Faso JEAN-MARCBOFFA, ICRAF, Kampala, Uganda EDOUARD G. BONKOUNGOU, Ouagadougou, Burkina Faso REMIGIUS BUKENYA-ZIRABA, Department of Botany, Makerere University, Kampala, Uganda CENTRENATIONAL DESEMENCESFORESTIERES, Ouagadougou, Burkina Faso FABEONCHIGUMIRA, Horticultural Research Centre, Marondera, Zimbabwe FELIX D. DAKORA, Botany Department, University of Cape Town, Cape Town, South Africa OLANREWAJU A. DENTON, National Horticultural Research Institute, Ibadan, Oyo State, Nigeria IDRISSADICKO, Ouagadougou, Burkina Faso EMMANUELV.DOKU, Department of Crop Science, University of Ghana, Legon, Ghana VERADOKU, Department of Crop Science, University of Ghana, Legon, Ghana ROGERELLIS, Agricultural Research Council, Lynn East, South Africa vi Copyright © National Academy of Sciences. All rights reserved. Lost Crops of Africa: Volume II: Vegetables http://www.nap.edu/catalog/11763.html KLAUSFLEISSNER, Mahene Research Station, Ombalantu, Namibia JEAN-MARIE FONDOUN, Institut de la Recherche Agricole pour le Développement, Yaoundé, Cameroon FRANCIS N.GACHATHI, Kenya Forestry Research Institute, Nairobi, Kenya BARBARA GEMMILL, University of Nairobi and Environment Liaison Center International, Nairobi, Kenya DONALDE.GREENBERG, Tulimara (Pvt) Ltd, Chispite, Harare, Zimbabwe INSTITUT SENEGALAIS DE RECHERCHES AGRICOLES, Parc Forestier de Hann, Dakar, Senegal MARIANA JOOSTE, Agricultural Research Council, Lynn East, South Africa SAMUELK.KARIKARI, Botswana College of Agriculture, Gaborone, Botswana DAVID O.LADIPO, CENRAD, Ibadan, Nigeria ELISSAVETAO.LOUTCHANSKA, Agostinho Neto University, Luanda, Angola PETERLOVETT, Legon, Accra, Ghana STANLEY MATEKE, Veld Products Research and Development, Gaborone, Botswana MABOKO S MPOSI, Faculty of Agriculture, University of the North, Sovenga, South Africa MOUHOUSSINE NACRO Laboratoire de Chemie Organique appliquee, Ouagadougou University, Ouagadougou, Burkina Faso OUSSEYNOUNDOYE, CIFOR Regional Office, Yaounde, Cameroon N. QUATNG, IITA, Ibadan, Nigeria AMADOUNIANG coordinateur de SLWA/ICRAF Bamako, Mali ALBERTNIKIEMA, CNSF, Ouagadougou, Burkina Faso JONATHON C. OKAFOR, Tree Crops and Tropical Ecology Consultants, Enugu, Enugu State, Nigeria O.O. OLUFAJO, Institute for Agricultural Research, Ahmadu Bello University, Samaru, Zaria, Kaduna State, Nigeria ADENIKE OLUFOLAJI, National Horticultural Research Institute, Ibadan, Oyo State, Nigeria MELOLUOCH, AVRDC Africa Regional Program, Duluti, Arusha, Tanzania MARY O.A. ONYANGO, Maseno University College, Maseno, Kenya DOVPASTERNAK, ICRISAT Sahelian Center, Niamey, Niger NAT&PATRICIAQUANSAH, Morondava Centre, Morondava, Madagascar JACKREEVES, International Institute of Tropical Agriculture, Ibadan, Nigeria SIDY SANOGO, Programme Ressources Forestières Sikasso, Mali HABYSANOU, Programme Ressources Forestières Sotuba, Mali PIETERSCHMIDT, Tropenbos Cameroon Programme, Kribi, Cameroon FRANKJ.SENKONDO, Sokoine University of Agriculture, Morogoro, Tanzania ABU SESAY, Department of Biological Sciences, University of Swaziland, Kwaluseni, Swaziland KALLUNDE SIBUGA, Department of Crop Science and Production, Sokoine University of Agriculture, Morogoro, Tanzania DAOUDASIDIBE, Programme Ressources Forestières Sotuba, Bamako, Mali vii Copyright © National Academy of Sciences. All rights reserved. Lost Crops of Africa: Volume II: Vegetables http://www.nap.edu/catalog/11763.html MODIBO M.SIDIBE, Institut d’economie Rurale, Bamako, Mali B.B. SINGH, International Institute of Tropical Agriculture, Kano Station, Nigeria MARIENNE SPREETH, ARC/LNR, Roodeplaat, South Africa FRANKW.TAYLOR, Veld Products Consultancies, Gaborone, Botswana ZACTCHOUNDJEU, ICRAF-Cameroon, Yaoundé, Cameroon JONATHAN TIMBERLAKE, Biodiversity Foundation for Africa, Bulawayo, Zimbabwe OTLOGETSWETOTOLO, University of Botswana, Gaborone, Botswana HARRY C. VAN DEN BURG, Umlimi Lokhonile Seeds, Malkerns, Swaziland SOGNONRAYMOND VODOUHÈ, IPGRI Cotonou, Benin GEBREYNTISO, Addis Ababa University HAROUNA YOSSI, Programme Ressources Forestières, Sikasso, Mali OTHER REGIONS SAYED AZAM-ALI, Tropical Crops Research Unit, University of Nottingham, Loughborough, Nottinghamshire, UK PATRICIABARNES-MCCONNELL, International Center, Michigan State University, East Lansing, Michigan, USA FRANK BEGEMANN, Centre for Agricultural Documentation and Information (ZADI), Bonn, Germany DOUGBOLAND, CSIRO Forestry and Forest Products, Kingston, ACT, Australia STEVENBRANDT, archaeologist, University of Florida, Gainesville, Florida, USA RICARDO BRESSANI, Centro de Ciencia y Tecnologia de Alimentos, Universidad del Valle de Guatemala, Guatemala BOB BRINSMEAD, Farming Systems Institute, Department of Primary Industries, Warwick, Queensland, Australia JOHN P. CHERRY, Eastern Regional Research Center, Wyndmoor, Pennsylvania, USA PABLOE.COLUCCI, University of Guelph, Guelph, Canada SAMUEL D. COTNER, Department of Horticultural Sciences, Texas A&M University, College Station, Texas, USA STAFFORD M.A. CROSSMAN, Agricultural Experiment Station, University of the Virgin Islands, St. Croix, Virgin Islands, USA MARIE-CHRISTINE DAUNAY, Genetique et Amelioration des Fruits et Legumes, INRA, Montfavet, France SØREN DØYGAARD, Tuborgvej, Hellerup, Denmark HAN VAN DIJK, Department of Environmental Science, Wageningen University, Wageningen, The Netherlands JEFFEHLERS, Department of Botany and Plant Sciences, University of California, Riverside, California, USA J. MICHAELFAY, Expeditions Council, National Geographic Society, Washington DC, USA viii Copyright © National Academy of Sciences. All rights reserved. Lost Crops of Africa: Volume II: Vegetables http://www.nap.edu/catalog/11763.html ROBFLETCHER, School of Land and Food, The University of Queensland Gatton College, Queensland, Australia GEOFF FOLKARD, Department of Engineering, University of Leicester, Leicester, UK EUNICE FOSTER, Department of Crop and Soil Sciences, Michigan State University, East Lansing, Michigan, USA PETERGRIFFEE, Forestry Department, FAO, Rome, Italy GERARDJ.H.GRUBBEN, PROTA, Wageningen, The Netherlands JANE I. GUYER, Program of African Studies, Northwestern University, Evanston Illinois, USA JOHN HALL, School of Agricultural and Forest Sciences, University of Wales, Bangor, Wales, UK M. HAROUNHALLACK, Inwood, West Virginia, USA DAVID HARRIS, Royal Botanic Garden, Edinburgh, Scotland, UK NAZMUL HAQ, International Centre for Underutilised Crops, University of Southampton, Southampton, UK JOHN HOLLAND, NSW Agriculture, Tamworth Centre for Crop Improvement, Tamworth, New South Wales, Australia HÉLÈNEJOLY, CIRAD, Montpellier, France CHARLESS.KAUFFMAN, The Accokeek Foundation, Accokeek, Maryland, USA WARWICK KERR, Genetica I Biociencias, Univ. Federal de Uberlandia, Uberlandia Minas Gerais, Brazil SARAHLAIRD, New York, New York, USA DAVID LAWLOR, Institute of Arable Crops Research, Rothamsted Experimental Station, Harpenden, Herts. UK ROGER LEAKEY, School of Tropical Biology, James Cook University, Cairns, Queensland, Australia SYLVIA LEE-HUANG, Department of Biochemistry, New York University School of Medicine, New York, New York, USA RICHARD N. LESTER, Birmingham University Botanic Gardens Winterbourne, England, UK MIKE LUCY, Farming Systems Institute, Department of Primary Industries, Pittsworth, Queensland, Australia BRIGITTE L. MAASS, Inst. for Crop & Animal Production in the Tropics, Georg- August-University Goettingen, Goettingen, Germany RUTHMALLESON, Dunsmore, Aylesbury, Buckinghamshire, UK FRANKLIN W.MARTIN, Lehigh Acres, Florida, USA J. TERRENCE MCCABE, Department of Anthropology, University of Colorado, Boulder, Colorado, USA LISA MCDONALD, James Cook University, Townsville Queensland, Australia LAURA C. MERRICK, Department of Agronomy, Iowa State University, Ames, Iowa, USA DONALDOSBORN, Peace Corps, Washington, DC, USA ix Copyright © National Academy of Sciences. All rights reserved.