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  • PROCEEDINS OF THE THIRD WORKSHOP ON

    SUSTAINABLE HORTICULTURAL PRODUCTION IN THE TROPICS

    26th to 29th November 2003, Maseno University (MSU) Maseno-Kenya

    Editors

    Abukutsa-Onyango, M.O., A.N. Muriithi, V.E. Anjichi, K. Ngamau and S.G. Agong (HAK, Kenya)

    A. Fricke, B. Hau and H. Sttzel (Hannover, Germany)

    Horticultural Association of Kenya (HAK) in collaboration with

    Maseno University (MSU)

    Jomo Kenyatta University of Science and Technology (JKUAT)

    and Universitt Hannover

    __________________________________________________________________________ DAAD-GERMAN ACADEMIC EXCHANGE SERVICES

  • Abukutsa-Onyango et al (2005) Proceedings of the Third Horticulture Workshop on Sustainable Horticultural Production in the Tropics, 26th -29th November 2003. Maseno University, MSU, Maseno, Kenya. i

    Published by the Department of Horticulture, Maseno University (MSU) P.O. Box Private Bag, 40105, Maseno, Kenya, Horticultural Association of Kenya and Jomo Kenyatta University of Agriculture and Technology (JKUAT) P.O. Box 62000, Nairobi, Kenya; Institute of Vegetable and Fruit science and Institute of plant Diseases and Plant Protection, University of Hannover, Herrenhauser Str. 2, D-30419, Hannover Germany and German Academic Exchange Sevice, DAAD, P.O. Box 14050, Nairobi, KENYA. 2005Department of Horticulture, MSU; Horticultural Association of Kenya;Institute of Vegetable and Fruit Science and Institute of Plant Diseases & Protection, University of Hannover and German Academic Exchange Service, DAAD. ISBN:9966-758-11-9 Organizing Committee KENYAN TEAM Prof. Stephen G.Agong(HAK &JKUAT) Team Leader Prof. Mary O.Abukutsa Onyango (HAK &MSU) Chairperson-HAK Ms Alice N. Muriithi (HAK) Secretary-HAK Dr Kamau Ngamau (HAK&JKUAT) Treasurer-HAK Victoria Anjichi (HAK Assistant Treasurer GERMAN TEAM (University of Hannover) Prof Hartmut Sttzel Team Leader Prof Benhard Hau Member Dr Andreas Fricke Member Enquiries about this book can be addressed to: Prof Mary O.Abukutsa Onyango Chairperson Horticultural Association of Kenya Department of Horticulture Maseno University P.O. Private Bag, 40105Maseno, Kenya. mabukutsa@yahoo.com CORRECT CITATION

    Abukutsa-Onyango. M.O., A.N. Muriithi, K. Ngamau, V. Anjichi, S.G. Agong, A. Fricke, B. Hau and H Sttzel. 2005. Proceedings of the Third Horticulture Workshop on Sustainable Horticultural Production in the Tropics, 26th -29th November 2003.Maseno University,MSU ,Maseno, Kenya.

    mailto:mabukutsa@yahoo.com

  • Abukutsa-Onyango et al (2005) Proceedings of the Third Horticulture Workshop on Sustainable Horticultural Production in the Tropics, 26th -29th November 2003. Maseno University, MSU, Maseno, Kenya. ii

    Organizers Horticultural Association of Kenya Department of Horticulture Maseno University P.O. Private Bag Tel: +254-57-351620/2 Fax:+254-57-351221 vc@maseno.co.ke mabukutsa@yahoo.com

    University of Hanonver Institute of Vegetable and Fruit Sciences and Institute of PlantDiseases and Plant Protection Herrenhaeuser Str. 2D-304 19, Hannover Tel: +49 511 762 2634 Fax: +49 511 762 3606 office@gem.uni-hannover.de

    Jomo Kenyatta University of Agriculture and Technology (JKUAT) P.O. Box 62000, Nairobi, Kenya. Tel:+254-67- 52181-4, 52711 Fax: +254-67-52197 dvcapd@nbnet.co.ke

    November 2005

    Website: http://www.gartenbau.uni-hannover.de/gem/svepit.htm

    mailto:vc@maseno.co.kemailto:mabukutsa@yahoo.commailto:office@gem.uni-hannover.demailto:dvcapd@nbnet.co.ke

  • Abukutsa-Onyango et al (2005) Proceedings of the Third Horticulture Workshop on Sustainable Horticultural Production in the Tropics, 26th -29th November 2003. Maseno University, MSU, Maseno, Kenya. iii

    TABLE OF CONTENTS CONTENT PAGE CORRECT CITATION ....................................................................................................................................................i TABLE OF CONTENTS................................................................................................................................................ iii PREFACE ......................................................................................................................................................................v OFFICIAL OPENING SPEECH .................................................................................................................................... vi KEY NOTE ADDRESS ..................................................................................................................................................1 EFFECTS OF WATER STRESS ON DRY MATTER PRODUCTION AND NUTRITIVE QUALITY OF SPIDERPLANT, (GYNANDROPSIS GYNANDRA (L.) BRIQ) .......................................................................................3 INTRODUCTION ...........................................................................................................................................................4 STUDIES ON HORTICULTURAL PRACTICES OF SOME AFRICAN INDIGENOUS VEGETABLES .......................13 MANAGEMENT OF MAJOR VEGETABLE CROP DISEASES IN ETHIOPIA: A REVIEW.........................................18 ETIOLOGY OF SEPTORIA LEAF SPOT OF COWPEA (VIGNA UNGUICULATA (L.) WALP.) IN KENYA................23 EFFECT OF SEED OSMOTIC PRIMING ON THE GERMINATION OF SPIDER.......................................................28 ON FARM SEED PRODUCTION IN KISII DISTRICT: AN OVERVIEW OF THE PRESENT SITUATION..................32 INTEGRATED CROP PROTECTION RESEARCH FOR SUSTAINABLE PRODUCTION OF INDIGENOUS VEGETABLE CROPS IN EASTERN AFRICA .....................................................................................37 A REVIEW ON THE SEED PRODUCTION AND HANDLING OF INDIGENOUS VEGETABLES (SPIDERPLANT, JUTE MALLOW AND AFRICAN NIGHTSHADE COMPLEX)..........................................................42 THE ECOBIODIVERSITY OF DOMESTICATED AND WILD TRADITIONAL LEAFY VEGETABLES OF NYANG'OMA, WESTERN KENYA ..............................................................................................................................49 COMMUNITY SEED PRODUCTION OF AFRICAN INDIGENOUS VEGETABLES....................................................59 SEED PRODUCTION AND SUPPLY SYSTEM OF THREE AFRICAN LEAFY VEGETABLES .................................60 EFFECTS OF PACKAGING AND STORAGE CONDITIONS ON SEED ....................................................................67 TOWARDS UTILISING PEST RESISTANCE AMONG LANDRACES IN INDIGENOUS VEGETABLES IN KENYA: APPROACHES AND OPPORTUNITIES ..................................................................................................73 TAXONOMIC CHARACTERIZATION AND IDENTIFICATION OF AFRICAN NIGHTSHADES (SOLANUM L. SECTION SOLANUM) .........................................................................................................................79 AFRICAN EGGPLANTS PROMISING VEGETABLES FOR HOME CONSUMPTION AND SALE IN TANZANIA ...................................................................................................................................................................86 PROMOTING COMMUNITY ACTION FOR SUSTAINABLE CONSERVATION AND UTILIZATION OF INDIGENOUS VEGETABLES AMONG SMALLHOLDER FARMERS ........................................................................94 A SURVEY ON PRODUCTION AND CONSUMPTION OF TRADITIONAL LEAFY VEGETABLES.........................100 AFRICAN INDIGENOUS VEGETABLES RECIPE DOCUMENTATION AND THEIR ROLE ....................................105 POTENTIAL FOR INCREASED USE OF INDIGENOUS KENYAN VEGETABLES AS FUNCTIONAL FOODS ......................................................................................................................................................................111 EVALUATION OF THE GROWTH AND NUTRITIONAL QUALITY OF AFRICAN NIGHTSHADE ACCESSIONS (SOLANUM SPP) AT DIFFERENT DEVELOPMENTAL STAGES. ..................................................115 NUTRITIONAL VALUE AND UTILIZATION OF INDIGENOUS VEGETABLES IN UASIN GISHU DISTRICT ..................................................................................................................................................................124 DIETARY EFFICACY OF AFRICAN INDIGENOUS VEGETABLES IN THE CONTROL OF MICRONUTRIENT DEFICIENCIES FOR POVERTY ALLEVIATION AND NUTRIENT SECURITY.........................127 EFFECT OF NUTRIENT SOLUTION, SILICON AND MANGANESE CONCENTRATIONS ON COWPEA (VIGNA UNGUICULATA L. WALP) LEAF WATER LOSS.........................................................................................134 RESEARCH CHALLENGES FOR DEVELOPMENT OF SMALL-SCALE HORTICULTURE IN THE HIGHLANDS OF MT KENYA.....................................................................................................................................140 RESPONSE OF TOMATO (LYCOPERSICON ESCULENTUM) TO MEDIA MIXTURE ...........................................144 PATHOGENICITY AND FUNGICIDE EFFICACY ON FUSARIUM WILT OF PAPAYA SEEDLINGS.......................151 MYCORRHIZAL EFFECTS ON GROWTH AND SUPPRESSION OF ROOT PATHOGENS IN SOME HORTICULTURAL CROPS .......................................................................................................................................157 EVALUATION OF ROOOTING MEDIA FOR COMMERCIAL NURSERY PROPAGATION OF VANILLA FRAGRANS IN UGANDA ..........................................................................................................................................163 DEVELOPING A BACULOVIRUS FOR THE MANAGEMENT OF DIAMONDBACK MOTH, PLUTELLA XYLOSTELLA L. IN BRASSICAS IN KENYA ................................................

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