Proceedings of the ISTRC-AB 8th Triennial Symposium November, 2001, Ibadan, Nigeria

No Title Author Page
1 Policy requirements for a root crop market economy in Africa. F.S.Idachaba 1-4
2 Perspectives in yam  research  in Africa. G.C.Orkwor 5-8
3 Approaches for the development of small-scale cassava processing and local food industries that meet the needs of the poor. Andrew Westby,J.White,T.Ngendello,O.Oyewole,N.T.Dziedzoave,
A.Graffham and Q.Van Oirschot
9-12
4 Contribution of root and tuber crops in Nigerian economy. M.C.Ikwelle 13-18
5 Promotion of orange-flesh sweet potato as a dietary source of pro-Vitamin A:lessons and strategies in eastern and southern Africa. Regina Kapinga 19-24
6 Comparative studies of in vitro cleaned planting material and field selected apparently clean sweetpotato planting material. John Otoo and M.D.Quain 25-27
7 Towards privatisation of planting material sector of roots and tuber crops in West Africa. K.Tetevi 28-37
8 Strategy for the development of a cassava industry in Africa. M.Bokanga 38-47
9 Theme paper:Trends in yam production in Africa. V.Manyong 48-51
10 Les facteurs déterminant la volonté des paysans à acheter des semences des varitétés améliorées d`igname au Bénin. J.C.Hinvi et Isaïe Adje 52-56
11 Role of produce price in the development project performance: case of cassava in cassava multiplication project (CMP). A.A.Adeniji,O.M.Jimoh and O.Vaughan 57-60
12 Varietal characteristics of cassava:farmer`s perceptions and preferences in the semiarid zone of West Africa. Kormawa  P 61-67
13 Towards adoption of new yam technologies. Amegbeto K. 68-75
14 Root and tuber crops at the Horticultural Research Centre:research and development highlights. Dhliwayo P 76-78
15 A model for rational determination of prices of seed potato(S.tuberosumL).tubers of different size grades using agronomic data. Demo P.,M.O.Akoroda and D.K.Njualem 79-81
16 Poverty alleviation through sustainable root and tuber crops production. Akele S.A.and G.O.Chukwu 82-84
17 The potential of commercialising sweet potato products:the Zimbabwe experiences.. Rukuni T.,A Mutungamiri and M.Chitiyo 85-87
18 Analysis of gender roles  in cassava production in Akwa Ibom State,Nigeria. Akpabio I.A.and E.O. Ekpe 88-91
19 Myths and realities of postharvest technologies for root crops:a case of cassava in Nigeria. O.I.Oladele and O.Arowojolu 92-95
20 Rural women cassava processors:technology and acumen for marketing in Nigeria. Stella Odebode 96-99
21 Processing and utilization of sweetpotato for food and livestock feed in Nigeria. E.T.Ojeniyi and O.O.Tewe 100-103
22 Cassava leaf utilization as a vegetable source for humans in Africa. A.U.Achidi 104-109
23 The effect of 60Co gamma radiation on the size of cassava starch granules and    its relationships to mealiness. O.Safo-Kantanka,K.Oppong-Agyare and R.Asante 110-113
24 Feeding the cassava processing industry:cassava production systems improved with cowpea. S.Ennin,J.N. Asafu-Agyei and H.K.Dapaah 114-118
25 Food quality attributes of Pona yams. B.O.Otegbayo 119-121
26 Amidon d`igname de Côte d`Ivoire(Dioscorea sp.): diversité biologique et variabilité des  propriétés physico-chimiques et fonctionnelles. N.G.Amani,D.Dufour,C.Mestres,A.Buleon and A.Kamenan 122-130
27 Effect of age of yam tuber at harvest on the qualities of yam foods. A.B.Abass 131-137
28 Screening of sweetpotato for poundability into fufu. E.Adu-Kwarteng,J.A.Otoo and I.Oduro. 138-141
29 Physico-chemical and pasting properties of flour from four sweetpotato varieties grown in Ghana. I.Oduro,W.O.Ellis,L.Nyarko,G.Koomson and J.A.Otoo 142-145
30 Quality of gari from 18 sweetpotato varieties W.O.Ellis,I.Oduro,K.Fianko and J.A.Otoo 146-149
31 Importance of ‘kabalagala’ processing to the sweetpotato product development needs in Uganda. C.Owori 150-156
32 Utilization potentials of some selected sweetpotato Ipomoea batatas(L).Lam.accessions for staple consumption in Africa diet and industrial  processing. P.O.Aikpokpodion,N.Q.Ng and M.O.Akoroda 157-160
33 Current status of production and utilization of some minor root crops in Nigeria:a preliminary investigation. G.N.Asumugha 161-165
34 Gari: food for the rich or the poor consumers in Nigeria. N.T.Meludu 166-168
35 Cost of various forms of energy used by gari processors and production constraints in Ijebu area of Ogun State,Nigeria. J.O.Akinyemi 169-172
36 Enzymic supplementation and utilization of cassava root sieviate(CRS) by growing pullets. F.A.Aderemi and O.O Tewe. 173-177
37 The problems and prospects of developing new cassava based products in Nigeria:The Ogun State experience. S.A.Balogun 178-181
38 Factors influencing the quality of Nigerian fufu O.B.Oyewole,L.O.Sanni,A.O.Dipeolu,K.Adebayo,I.A.Ayinde,
J.L.White,K.I.Tomlins and A. Westby.
182-184
39 Post- harvest and seasonal   tuber changes in four cassava verieties:processing implications. M.O.Sanni  and A.O.Olubamiwa 185-188
40 The effect of ambient storage of cassava tubers on starch quality. S.O.Agunbiade and M.O.Sanni 189-193
41 Prolonging shelf life of fresh sweetpotatoes through solar curing.                                                             A.W.Kihurani 194-97
42 Urban market opportunities for high quality cassava products in Ghana. C.C.Collinson,G.van Dyck,S.Gallat and A.Westby. 198-199
43 Importance of Bacillus and Clostridium  spp.in the cassava fufu fermentation. N. Piper and A. Westby 200-201
44 Ceilsmo storage of yam:an innovation or abnormality. G.O.Chukwu and K.E.Chukwu 202-204
45 Development and storage  stability  of some traditional snack foods from sweet potato. M.A.Idowu,L.O.Sanni and O.B. Farore 205-207
46 Effect of length of fermentation and varieties on the qualities of sweetpotato gari. L.O.Sanni,D.P.Ikuomola and S.A.Sanni. 208-211
47 Accumulation des reserves amylacées racinaires chez trois clones e manioc à Odziba. J.Mabanza,J.Mahouka and B.Boumba. 212-215
48 Sweet potato roots and tops for pullet chick production in Nigeria. O.A.Ladokun and O.O.Tewe 216-218
49 Potentials of Chinese yam(Dioscorea esculenta) flour in bread making U.J.Ukpabi and N.Uchechukwu 219-221
50 Effect of processing methods and storage conditions of the qualities of fried sweetpotato chips M.A.Idowu,L.O.Sanni and O.A.Osunbitan 222-223
51 Current status of cassava processing technology in semi-arid area of West and Central Africa. Tshuinza and R.Okechukwu 224-228
52 Cost effective cassava rations for poultry and pigs. O.O.Tewe 229-234
53 Theme paper:Studies on potato seed performance under on-farm storage conditions in Mount Kenya Region. A.Walingo,C.Lung’aho,P.Kinyae,J.Kabira and R.El-Bedewy 235-239
54 Combined use of soil fertility indicators and crop yields for determining appropriate cassava-based  crop mixture for soils of Eastern Nigeria. C.L.A. Asadu and A.G.O.Dixon 240-246
55 Accumulation of cyanogenic compounds in the cassava tuberous roots as influenced by leaf expansion rate and crop growth rate. C.M.Githunguri 247-256
56 Réponse du manioc à l’azote,au phosphore et au potassium sur les terres de barre au Sud du Bénin. A.M.Toukourou et R.J.Carsky 257-259
57 Response of the Pona varitey of yam (Dioscorea rotundata) to the minisett technique of yam propagation. J.P.Tetteh and C.Mensah 260-264
58 A technique for grafting of water yam(D.alata L.) H.Shiwachi,T.Ayankanmi and R.Asiedu 265-267
59 Induction of germination in dormant yam (Dioscoreaspp.)tubers with inhibitors of gibberellins. H.Shiwachi,T.Ayankanmi,M.Onjo and R.Asiedu 268-271
60 Fibrous root system growth of cassava in the Sudan Savanna Zone I.J.Ekanayake 272-277
61 Response of cassava varities(Manihot esculentaCrantz) to Nitrogen and potassium in the derived savanna and southern Guinea savanna of Nigeria. O.Ghebreyesus and G.Tian 278-281
62 The relationship between the accumulation of cyanogenic glucosides and free amino acid content in cassava(Manihot esculenta Crantz). Y.Chukwumah 282-286
63 Use of four cover crops for management of Imperatacylindrica fallow followed by cassava/maize intercrop in forest savanna transition and wet savanna zones of Nigeria. A.A.Melifonwu 287-292
64 Evalutaion of the contribution of leguminous cover crops to the conservation of soil resource base and productivity of yam based systems. A.O.Ano,G.C. Orkwor and J.E.G.Ikeorgu 293-295
65 Compatibility of cocoyam(Xanthosomasagittifolium[L.] Schott),egusi melon and pumpkin un intercropping system. F.A.Nwagwu and H.Tijani-Eniola 296-302
66 Some aspects of evolution of yam-based systems in Benin. P. Vernier and R.A. Dossou 303-307
67 Effects of row intercropping of minisett cocoyam/maize on component crop yields and productivity in a lowland rainfed ecology in southeastern Nigeria. P.A.Okwuowulu and J.E.G.Ikeorgu 308-314
68 Application of mycorrhizal and hedgerow technology in cassava production. O.Fagbola and O.Osonubi 315-317
69 Effects of intercropping sweetpotato with plantain on the growth and yield of the mixture. S.O.S Akinyemi 318-320
70 Improving taro cropping system in Ghana:a participatory research-farmer-extension approach. R.Sagoe,R.Bam,J.manu-Aduening,J.Haleegoah,D.Dedzoe,
J.P.Tetteh,J.K.Osei,O.Safo-Kantanka and MOFA Staff.
321-323
71 Studies of the influence of VAM fungi on growth of maize intercropped with cassava in alley cropping system in the Derived Savanna Zone. O.J.Oyetunji,I.J.Ekanayake andO.Osonubi. 324-329
72 Evaluation of cassava-based cropping systems and application of the agroforestry model WaNuLCAS in Benin Republic,West Africa. S.J.Lose 330-337
73 Theme paper.Augmented block design-the choice design for large scale farmer participatory on-farm trials. Sagary Nokoe 338-342
74 Cassava variety and mound height effects on productivity of cassava in an inland valley swamp ecology in Sierra Leone. A.Jally 343-347
75 Farmer participatory evalution of yams(Dioscorea species) in Ghana E.Otoo,E.Moses,J.N.L.Lamptey,J.Adu-Mensah 348-352
76 Development and evaluation of hybrid yams (Dioscorea rotundata Poir) in pre-release multilocational trials in Nigeria. G.C.Orkwor,R.Asiedu,S.K.Hahn,D.Surma,U.Udensi and G.O.Chukwu 353-355
77 Influence and yield improvement on economic productivity of yam in southwestern Nigeria. G.O.Agbaje 356-357
78 Off season yam production to enhance food security. J.E.G.Ikeorgu and H.N.Igwilo 358-360
79 Fertilizer efficiency and productivity of ginger on a Haplic Acrisol in southeastern Nigeria. G.O.Chukwu and J. K.Emehute 361-363
80 Effects of cultivars and fertilizer on the yield and culinary qualities of cassava. E.O .Ekpe,O.W.Udoette and B.A.Ndon 373-375
81 Growth and yield responses of cocoyam cultivars to some tillage practices in Uyo south eastern Nigeria. N.U.Ndaeyo,E.O.Ekpe,S.O.Edem and U.G.Umoh 367-372
82 Effects of tuber portion and time of harvest on the dry matter yield of water yam(D.allata L.)planted through minisett. E.O.Ekpe,B.A..Ndon and U.S.Ukut. 364-366
83 Archiving root and tuber research data. R. U. Okechukwu 376-379
84 Effect of poultry manure on yield performance of livingstone potato/rizga(plectranthusesculentus N.E.Br) in southeastern Nigeria. A.O.Olojede,M.C.Igbokwe and M.C.Ikwelle 380-381
85 Variations in seed yam production techniques across agroecologies in Cameroon. J.M.Ngeve and C.Nolte 382-386
86 Yam production in Ghana-a food security enhancer or an environmental degrader? E.Otoo 387-391
87 Evaluation participative des clones améliorés de manioc en milieu paysan enAfrique de l`Ouest: cas du Bénin,de la Guinée,du Tchad et du Togo N.G.Maroya 392-398
88 Trait association and path analysis for yield of cassava genotypes grown in various agroecologies in Nigeria. O.O. Aina 399-404
89 The release of the new improved cassava varieties in Malawi. I.R.M.Benesi,C.C.Moyo,J.Mkumbira,F.P.Chipungu,N.M.Mahungu and V.S.Sandifolo 405-411
90 The genetic improvement of the white yam by gamma irradiation of white yam mini-tubers. E.C.Nwachukwu and I.U.Obi 412-417
91 Influence of harvesting period on improved cassava genotypes in maritime Guinea. El-Sanoussy Bah and Savane Djibril 418-420
92 Evaluating sweet potato clones for consumers in south western Nigeria. O.Edebiri,I.N.Egeonu and M.O.Akoroda 421-425
93 Farmer participatory cassava variety evaluation and selection in Uganda. G.N.Ssemakula,A.Bua,Y.K.Baguma,S.Tumwesigye,W.Sserubomwe,
T.Alicai and C.Omongo
426-434
94 Importance of diseases in participatory cassava breeding. E.Moses 435-437
95 Screening yams(Dioscorea spp.) for organoleptic quality. M.O.Adeniji and R.Asiedu 438-441
96 A new paradigm for characterization of root and tuber crops germplasm in Ghana based on cassava. Safo Kantanka 442-447
97 Status of root crop germplasm management in Ghana S.Bennett-Lartey 448-455
98 Morpho-agronomic characterization of cocoyam germplasm collected from seven regions in Ghana. M.O.Opoku-Agyeman 456-460
99 Evaluation of phenotypic variation in water yam(Dioscorea alataL.)germplasm using multivariate analysis. Chiedozie Egesi 461-468
100 Genetic relationships based on agrobotanical characteristics of local cassava germplasm in Sierra Leone. F.B.Massaquoi 469-475
101 Genetic diversity in 96 accessions of cassava as revealed by random amplified polymorphic DNAs (RAPDs). S.K.Offei,E.Y.Danquah,E.Okai,H.D.Mignouna and A.G.O.Dixon 476-481
102 Identification of molecular markers associated with a new source of resistance to the cassava mosaic disease. S.Offei,E.Y.Danquah,Y.Lokko,M.Gedil and A.G.O.Dixon 482-485
103 Variartion and genetic mapping of quantitative triats in an F1 intraspecific cross between two non-inbred parents in cassava. E.Okogbenin and M.A.Fregene 486-497
104 Effect of explant age on in vitro development of three Dioscorea species. M.D.Quain and E.Acheampong 498-501
105 Cryopreservation of cassava (Manihot esculenta Crantz). O.J.Adeniyi, M.O.Akoroda and S.Y.C.Ng 502-505
106 Integrated control of cassava bacterial blight by (1) combined control nmeasures and (2)host plant resistance adapted to agro-ecological conditions and (3) improved pathogen detection K.Wydra,B. Ahohvendo,A Banito,R.N.C. Copper,A.Dixon,V.Foye,B.Kemp,K.Kpemoua,K.Rudolph,V.Verdier,
M.Randjanakou and V.Zinzou
506-515
107 Reactions of white yam(Dioscorea rotundataPoir.) genotypes to three viruses infecting yams. Babajide Odu 516-521
108 Theme Paper:Nematodes:pre-and post-harvest pests of root and tuber crops? A brief overview. Danny Coyne 522-525
109 Pests and diseases of potato (Solanum tuberosum L.) in Nigeria E.C.Nwauzor and T.Dalyop 526-532
110 Comparative analysis of insect pest,disease and nematode incidence on dry and rainy seasons planted yams in Benue State,Nigeria. T.O Ezulike,E.C.Nwauzor and G.C.Orkwor 533-536
111 Screenig sweet potato cultivars for susceptibility to Rhizopus oryzae. M.Muhanna,D.Rees and J.Aked 537-541
112 The deployment of resistant sweet potato varieties in areas of Uganda where sweet potato virus disease is prevalent. R.W.Gibson,V.Artitua,I.Mpembe and J.Kayongo 542-544
113 Control of postharvest fungal rot of white yam(Dioscorea rotundata Poir) with botanicals T.Sangoyomi 545-550
114 Yield performance and late blight reaction of different potato genotypes in the highlands of Ethiopia. W.Gebre-Medhin,R.El-Bedewy,k.Bekele,M.Olaya,G.Endala,S.Atsede and L.Berga 551-553
115 Reaction  of 22 potato(Solanum tuberosum L.)genotypes to wilt in Cameroon. D.K.Njualem,P.Demo,H.A.Mendoza,J.T.Koi and S.F.Nana 554-556
116 Etiologie de la pourriture du manioc au Togo:identification et pouvoir pathogene de l`agent responsable. B.Tchabana and K.E.Kpemoua 557-561
117 Anthracnose disease of yams in West Africa M.M.Abang 562-571
118 Cultural control of Scutellonema bradys on edible yams. B.Claudius-Cole 572-576
119 Sources of resistance to cassava anthracnose disease. O.F.Owolade 577-580
120 Cassava systems in Nigeria:root yield management. M.O.Akoroda 581-583
121 Prevalence of cassava root rot disease and the associated pathogens in Nigeria. T.J.Onyeka 584-588
122 Response of groundnut (Arachis hypogaea L.) in sole and intercrop with cassava(Manihot esculenta Crantz) to population density in an Alfisol density in south-west Nigeria. V.O.Aduramigba-Modupe 589-593
123 Effects of Glomusdeserticola on the yield and nutrient cuptake of cassava in an alley cropping system. Awotoye O.O 594-596
124 Theme paper: Bacterial tuber rot of seed yams(Dioscorea rotundata) in Nigeria and the Republic of Benin. M.Ayodele 597-601
125 Diseases and pests of yam. L.Kenyon 602
126 Production of yams (Dioscorea spp.) in Sierra Leone:initiatives for increased production. Tanzila Salia-Konneh,A.Jalloh and R.Asiedu 602
127 Identification  and potential use of RAPD markers linked to cyanogenic potential in  cassava. Ida Dossou-Yovo,J.H.Mignouna,J.Machuka and M.Bokanga 603-607
128 Regional integration of demand-led root crop research and development:the case of SADC countries. N.M.Mahungu 608-615
129 Sub-regional partnership for the development of yams in West Africa. C.C.Okonkwo and R.Asiedu 616-619
130 Contribution to the agro-morphological characterization of yams Dioscorea alata species of Cote d`lvoire A.M.Kouakuo,H.D.Mignouna, J.Zoundjihekpon, N.Q. Ng, R.Asiedu, N.Ahoussou, S. Doumbia and G.P.Zohouri. 620-625