Keywords (1)Notes (60)Abstracts (10)
Targeting cowpea breeding and seed delivery efforts to enhance poverty impacts in sub-Saharan Africa, Coulibaly, O., Alene, A., Abdoulaye, T., Chianu, J., Manyong, V., Aitchedji, C., Fatokun, C., Kamara, A., Ousmane, B., Tefera, H. and Boahen, S., Abstract (Oral presentation) in Program and Book of Abstracts of the 5th World Cowpea Research Conference, held at Palm Beach Hotel, Saly, Senegal. 27 September - 1 October, 2010.
 
Keywords:socioeconomic studies, cowpea, sub-Saharan Africa

A resource-based characterization of farmers in the rural Central African Highlands, Ouma, E., Van Asten, P. and Dubois, T., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Adoption and dissemination of improved bean varieties in Burundi, Niyuhire, C.*, Ouma, E., Ndimurirwo, L.* and Ruraduma, C.*, Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Adoption and impact of tissue culture bananas in Burundi, Ouma, E., Van Asten, P. and Dubois, T., In: Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Agronomic evaluation of common and improved dessert banana cultivars at different altitudes across Burundi, Kamira, M.*, Crichton, R. J., Kanyaruguru, J., Van Asten, P., Blomme, G., Lorenzen, J., Njukwe, E., Van den Bergh, I., Ouma, E. and Muchunguzi, P., pages 37-47, chapter 5, CABI, ISBN 978-1-78064-231-4, 2013.
 
Arbuscular mycorrhizal fungi colonization, plant parasitic nematodes and their impact on East African highland banana performance in Rwanda, Gaidashova, S.*, Van Asten, P., Delvaux, B., De Waele, D. and Declerck, S., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Banana die-back: a new disease of bananas, Auwerkerken, A., Hughes, J., Coyne, D. and De Waele, D., International Institute of Tropical Agriculture (IITA), 2001.
 
Banana-beans intercropping in Burundi: effect of mulch application and mulch type, Bizimana, S.*, Baret, P., Jassogne, L. and Van Asten, P., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
BBTV in sub-Saharan Africa: status and needs, Kumar, P. L., Hanna, R., Mwemenamda, B., Beed, F., Lorenzen, J., Fiaboe, K., Van Asten, P., Hauser, S., Akinbade, S., Oben, T., Soko, M.*, Londa, R.*, Ngeve, J., Mutunda, M. P.*, Kiala, D.* and Naidu, R., 2009.
 
Building "climate smart" East African coffee production systems, Van Rikxoort, H., Jassogne, L., Laderach, P. and Van Asten, P., Abstract (Oral Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Challenges and opportunities for macropropagation technology for Musa among small-holder farmers and small and medium scale enterprises, Njukwe, E., Ouma, E. and Van Asten, P., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Challenges and opportunities for macropropagation technology for Musa spp. among smallholder farmers and small- and medium-scale enterprises, Njukwe, E., Ouma, E., Van Asten, P., Muchunguzi, P. and Amah, D., pages 66-71, chapter 8, CABI, ISBN 978-1-78064-231-4, 2013.
 
CIALCA interventions for productivity increase of cropping system components in the African Great Lakes zone, Pypers, P., Bimponda, W.*, Birachi, E., Bishikwabo, K., Blomme, G., Carpentier, S. C., Gahigi, A.*, Gaidashova, S.*, Jefwa, J.*, Kantengwa, S., Kanyaruguru, J., Lepoint, P., Lodi-Lama, J., Manzekele, M.*, Mapatano, S.*, Merckx, R ., Ndabamenye, T.*, Ngoga, T.*, Nitumfuidi, J.*, Niyuhire, C.*, Ntamwira, J.*, Ouma, E., Sanginga, J. M., Sivirihauma, C., Swennen, R.+, Van Asten, P., Vanlauwe, B., Vigheri, N. and Walangululu, J.*, Abstract (Oral Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
CIALCA livelihood baseline survey report: technical report, No. 17, Ouma, E., Birachi, E., Pypers, P., Vanlauwe, B.+, Ekesa, B., Blomme, G., Chianu, J., Bouwmeester, H. and Van Asten, P., number 17, 2011.
 
CIALCA's efforts on integrating farming system components and exploring related trade-offs, Van Asten, P., Vanlauwe, B., Ouma, E., Pypers, P., Van Damme, J., Blomme, G., Lepoint, P., Ntamwira, J.*, Bouwmeester, H., Birachi, E., Jassogne, L., Muliele, T., Bizimana, S.*, Nibasumba, A., Delstanche, S., Baret, P., Sanginga, J. M., Bafunyembaka, F. and Manzekele, M.*, Abstract (Oral Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Coffee/Banana intercropping as an opportunity for smallholder coffee farmers in Uganda, Rwanda and Burundi, Jassogne, L., Nibasumba, A.*, Wairegi, L., Baret, P., Deraeck, J., Mukasa, D., Wanyama, I., Bongers, G. and Van Asten, P., pages 144-149, chapter 18, CABI, ISBN 978-1-78064-231-4, 2013.
 
Coffee-banana intercropping systems as an opportunity for smallholder coffee farmers, Jassogne, L., Nibasumba, A., Wairegi, L., Baret, P., Deraeck, J., Mukasa, D., Wanyama, I., Gatarayiha, C., Bongers, G. and Van Asten, P., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Development of ELISA for the detection of Xanthomonas campestris pv. musacearum, Nakato, V., Akinbade, S., Kumar, P. L., Bandyopadhyay, R. and Beed, F., Abstract, p.130 in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Development of ELISA for the detection of Xanthomonas campestris pv. musacearum, Nakato, V., Akinbade, S., Kumar, P. L., Bandyopadhyay, R. and Beed, F., Poster presented at the CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Development of ELISA for the detection of Xanthomonas campestris pv. musacearum, the causal agent of BXW: banana Xanthomonas wilt, Nakato, V., Akinbade, S., Kumar, P. L., Bandyopadhyay, R. and Beed, F., pages 93-100, chapter 11, CABI, ISBN 978-1-78064-231-4, 2013.
 
Dissemination and use of cassava chippers in Cameroon, Kirscht, H. and Njukwe, E., Abstract, p. 94 in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Do commercial biological and chemical products increase crop yields and economic returns under smallholder farmer conditions?, Jefwa, J.*, Pypers, P., Jemo, M., Thuita, M., Mutegi, E., Laditi, M. A, Faye, A.*, Kavoo, A. M.*, Munyahali, W., Herrmann, L., Atieno, M., Okalebo, J. R., Yusuf, A. A.*, Ibrahim, A.*, Ndung'u-Magiroi, K. W.*, Asrat, A.*, Muletta, D.*, Ncho, C.*, Kamaa, M. and Lesueur, D., pages 81-96, chapter 7, Springer, ISBN 978-3-319-07662-1, 2014. [DOI]
 
Drivers of technology adoption in the banana-legume systems in the East and Central Africa region, Ouma, E., Birachi, E., Kasereka, V., Garming, H., Macharia, I.*, Van Asten, P., Chifizi, A.*, Nyagaya, M., Ekesa, B., Van Damme, J., Vanlauwe, B., Blomme, G., Niyuhire, C.*, Ndimurirwo, L.*, Ochieng, J., Dubois, T., Pypers, P., Wairegi, L., Ruraduma, C.*, Bizoza, A.* and Maertens, M., Abstract (Oral Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Drought stress, nitrogen and potassium deficiency effects on dry matter partitioning in East African highland bananas, Taulya, G., Van Asten, P., Leffelaar, P. A. and Giller, K., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Effect of banana leaf pruning on banana and bean yield in an intercropping system in Eastern Democratic Republic of Congo, Ntamwira, J.*, Pypers, P., Van Asten, P., Vanlauwe, B., Vigheri, N., Badesire, A.* and Blomme, G., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Effect of banana leaf pruning on banana growth and legume yield in banana-legume intercropping systems in Burundi, Emera, W., Lepoint, P., Blomme, G., Van Asten, P. and Pypers, P., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Effect of banana leaf pruning on legume yield in banana-legume intercropping systems in Eastern Democratic Republic of Congo, Ntamwira, J.*, Pypers, P., Van Asten, P., Vanlauwe, B., Ruhigwa, B. A., Lepoint, P. and Blomme, G., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Effect of banana leaf pruning on legume yield in banana-legume intercropping systems in Eastern Democratic Republic of Congo, Ntamwira, J.*, Pypers, P., Van Asten, P., Vanlauwe, B., Ruhigwa, B. A., Lepoint, P. and Blomme, G., pages 158-165, chapter 20, ISBN 978-1-78064-231-4, 2013.
 
Effect of plant density on growth and yield of East African highland banana (Musa spp.) in low input cropping systems in Rwanda, Ndabamenye, T.*, Van Asten, P., Blomme, G., Ragama, P., Swennen, R.+, Annandale, J.*, Vanlauwe, B. and Barnard, R., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Enhanced utilization of biotechnology research and development innovations in Eastern and Central Africa for agro-ecological intensification, Masiga, C. W., Mugoya, C., Ali, R.*, Mohamed, A*, Osama, S.*, Ngugi, A.*, Kiambi, D.*, de Villiers, S.*, Ngugi, K.*, Niyibigira, T.*, Tesfamichel, A.*, Machuka, J.*, Oduor, R.*, Runo, S.*, Adam, R.*, Matheka, J.*, Bedada, L.*, Seth, M*, Kuria, E.*, Ndirigwe, J.*, Ndolo, P.*, Muthamia, Z.*, Nasona, B.*, Ntimpirangeza, M.*, Tsegaye, E.*, Desterio, N.*, Ogero, K.*, Mburugu, G.*, Mukasa, S.*, Kim, D., Ferguson, M., Mneney, E.*, Nsubuga, E.*, Rishurimuhirwa, T.*, Byamugisha, D.*, Wamatsembe, I.*, Nzuki, I.*, Mkamilo, G.*, Kimata, B.* and Ketema, S., pages 97-104, chapter 8, Springer, ISBN 978-3-319-07661-4, 2014. [DOI]
 
Evaluation of existing inputs delivery systems for banana and legumes based systems in Burundi, Kimana, C., Ouma, E., Van Asten, P., Anyango, A. and Nyandwi, B., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Evaluation of exotic, improved and local Musa germplasm in contrasting agro-ecological zones across Central Africa, Muller, K., Ntamwira, J.*, Gaidashova, S.*, Kanyaruguru, J., Sivirihauma, C., Vigheri, N., Van Asten, P., Blomme, G., Lorenzen, J., Van den Bergh, I., Ouma, E., Muliele, T. and Muchunguzi, P., Abstract (Poster Presentation), p. 83 in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Exploring the scope of fertilizer use in the East African region, Wairegi, L. and Van Asten, P., Abstract (Oral Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Impact of arbuscular mycorrhizal fungi on growth of banana genotypes in three different, pasteurized and non-pasteurized soils of Rwanda, Gaidashova, S.*, Nsabimana, A.*, Van Asten, P., Delvaux, B., Elsen, A. and Declerck, S., pages 72-82, chapter 9, CABI, ISBN 978-1-78064-231-4, 2013.
 
Improved cassava varieties increase the risk of soil nutrient mining: an ex-ante analysis for western Kenya and Uganda, Fermont, A., Obiero, H., Van Asten, P., Baguma, Y.* and Okwuosa, E.*, pages 511-519, Springer, ISBN 978-1-4020-5759-5, 2007.
 
Indigenous arbuscular mycorrhizal fungi and growth of tissue-cultured banana plantlets under nursery and field conditions in Rwanda, Jefwa, J.*, Rurangwa, E.*, Gaidashova, S.*, Kavoo, A. M.*, Mwashasha, M.*, Robinson, J.*, Blomme, G. and Vanlauwe, B., pages 83-92, chapter 10, CABI, ISBN 978-1-78064-231-4, 2013.
 
Interactions between cassava mosaic geminiviruses and the African pandemic of cassava mosaic disease, Owor, B., Legg, J., Okao-Okuja, G., Obonyo, R. and Ogenga-Latigo, M.*, in: Paper presented, Kampala, Uganda, 2002.
 
L'insecurite alimentaire Chronique au Burundi: la banane et les legumineuses comme filieres porteuses, Kanyaruguru, J., Niyongere, C.*, Niyuhire, C.*, Njukwe, E., Vanlauwe, B., Van Asten, P. and Blomme, G., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Mitigating the impact of biotic constraints to build resilient banana systems in Central and Eastern Africa, Swennen, R.+, Blomme, G., Van Asten, P., Lepoint, P., Karamura, E. B.*, Njukwe, E. and Lorenzen, J., Abstract (Oral Presentation), p. 15 in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
On-farm evaluation of newly introduced east African highland banana hybrids in Burundi and North Kivu, Muchunguzi, P., Tushemereirwe, W. K.*, Vigheri, N., Lwanga, C., Kanyaruguru, J., Ouma, E., Blomme, G., Van Asten, P., Kezumutima, M.*, Kimana, C. and Lorenzen, J., Abstract (Poster Presentation), p. 115 in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Optimised DNA capture protocols in the field, extraction and PCR diagnostics for Banana Xanthomonas Wilt and Banana Bunchytop virus using simple DNA capture kits, Ramathani, I., Valentine, N. and Beed, F., Abstract, p. 173 in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Partenariat de CIALCA pour une dissemination efficace et durable des technologies, Bisimwa, C.*, Antoine, L., Sanginga, J. M., Vanlauwe, B. and Njukwe, E., Abstract, p. 280 in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Plant and soil interactions between adjunct coffee and banana plots in Burundi: preliminary assessment in farmer field conditions., Nibasumba, A.*, Baret, P., Jassogne, L. and Van Asten, P., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Processes and partnerships for effective regional surveillance of banana (Musa spp.) diseases, Beed, F., Kubiriba, J.*, Mugalula, A.*, Kolowa, H.*, Bulili, S.*, Nduwayezu, A.*, Murekezi, C.*, Sakayoya, E.*, Ndayihanzamaso, P.*, Mulenga, R.*, Abass, M.*, Mathe, L.*, Masheka, B.*, Onyango, M.*, Shitabule, E.*, Nakato, V., Ramathani, I. and Bouwmeester, H., pages 210-215, chapter 25, CABI, ISBN 978-1-78064-231-4, 2013.
 
Processes and partnerships for effective regional surveillance of banana diseases, Beed, F., Kubiriba, J.*, Mugalula, A.*, Kolowa, H.*, Bulili, S.*, Nduwayezu, A.*, Murekezi, C.*, Sakayoya, E.*, Ndayihanzamaso, P.*, Mulenga, R.*, Abass, M.*, Mathe, L.*, Masheka, B.*, Onyango, M.*, Omoto, E.*, Nakato, V., Ramathani, I. and Bouwmeester, H., Poster presented at the CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Processes and partnerships for effective regional surveillance of banana diseases, Beed, F., Kubiriba, J.*, Mugalula, A.*, Kolowa, H.*, Bulili, S.*, Nduwayezu, A.*, Murekezi, C.*, Sakayoya, E.*, Ndayihanzamaso, P.*, Mulenga, R.*, Abass, M.*, Mathe, L.*, Masheka, B.*, Onyango, M.*, Omoto, E.*, Nakato, V., Ramathani, I. and Bouwmeester, H., p. 246. Abstract in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Production performance of three Cassava varieties in the forest savanna margins of Eastern Cameroon, Sarr, S., Araki, S. and Njukwe, E., Abstract, p. 183 in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Prospects of using Beauveria bassiana in the IPM of the banana weevil, Cosmopolites sordidus (Germar) in Uganda, Nankinga, C., Gold, C., Moore, D., Tushemereirwe, W. K.* and Godonou, I., in: Paper presented, Kampala, Uganda, 2002.
 
Quality assessments of banana beverages in Rwanda, Kanyana, I., Ouma, E. and Van Asten, P., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Selection of sampling methods for evaluating banana weevil Cosmopolites sordidus (Germar) (Coleoptera: Curculionidae) damage on highland cooking banana (Musa spp., genome group AAA-EA), Ragama, P., Gold, C. and Rukazambuga, N., in: Proceedings, Kampala, Uganda, 2002.
 
Soil-related effects of arbuscular mycorrhizal fungi performance on banana (Musa spp.), Gaidashova, S.*, Van Asten, P., Delvaux, B., Elsen, A. and Declerck, S., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Statistical and spatial comparison of livelihood capitals assessed by three independent surveys in South Kivu in the Democratic Republic of Congo, Bouwmeester, H., Van Asten, P., Heuvelink, G. and Ouma, E., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Strategies For Farming Systems Development In sub-Saharan Africa, IITA, , International Institute of Tropical Agriculture (IITA), 2003.
 
The effectiveness of crop improvement programmes from the perspectives of varietal output and adoption: cassava, cowpea, soybean and yam in sub-Saharan Africa and maize in West and Central Africa, Alene, A., Abdoulaye, T., Rusike, J.*, Manyong, V. and Walker, T. S., pages 74-122, chapter 6, CGIAR and CABI, ISBN 978 1 78064 401 1, 2015.
 
Towards closer collaboration and co-ordination in the postharvest sector—a CGIAR strategy perspective, Ferris, R. S. B., Best, R., Goletti, F. and Wheatley, C., in: From biological control to a systems approach in post-harvest:, pages 182-198, International Institute of Tropical Agriculture (IITA); GTZ,, 1999.
 
Use of DNA capture kits for diagnoses of Banana Xanthomonas Wilt and Banana Bunchy Top Disease, Ramathani, I., Nakato, V. and Beed, F., Poster presented at the CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Use of DNA capture kits to collect Xanthomonas campestris pv. musacearum and banana bunchy top virus pathogen DNA for molecular diagnostics, Ramathani, I. and Beed, F., pages 109-115, chapter 13, CABI, ISBN 978-1-78064-231-4, 2013.
 
Variations in on-farm plant densities and their impact on yield in low input East African highland banana (Musa spp.) cropping systems: a case study of Rwanda, Ndabamenye, T.*, Van Asten, P., Vanhoudt, N., Blomme, G., Annandale, J.*, Swennen, R.+, Bagabe, M. C.*, Sallah, P. and Barnard, R., Abstract (Poster Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Varietal adoption, outcomes and impact., Walker, T. S., Alwang, J., Alene, A., Ndjuenga, J., Labarta, R., Yigezu, Y., Diagne, A., Andrade, R., Andriatsitohaina, R. M., De Groote, H., Mausch, K., Yirga, C.*, Simtowe, F., Katungi, E., Jogo, W., Jaleta, M., Pandey, S. and Charyulu, D., pages 388-405, chapter 19, CGIAR and CABI, ISBN 978-1-78064-401-1, 2015. [DOI]
 
Varietal generation and output, Walker, T. S., Alene, A., Ndjuenga, J., Labarta, R., Yigezu, Y., Diagne, A., Andrade, R., Andriatsitohaina, R. M., De Groote, H., Mausch, K., Yirga, C.*, Simtowe, F., Katungi, E., Jogo, W., Jaleta, M., Pandey, S. and Charyulu, D., pages 370-387, chapter 18, CGIAR and CABI, ISBN 978-1-78064-401-1, 2015. [DOI]
 
Walking the impact pathway: the CIALCA experience in mobilising agricultural knowledge for the African Great Lakes Region, Van Schagen, B., Njukwe, E., Katharina, P. B., Sengele, N.*, Mazibo, F.*, Blomme, G., Vanlauwe, B. and Van Asten, P., Abstract (Oral Presentation) in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011.
 
Beta-carotene micellarization during in vitro digestion and uptake by caco-2 cells is directly proportional to beta-carotene content in different genotypes of cassava, Thakkar, S. K., Maziya-Dixon, B., Dixon, A. and Failla, M. L., in: Journal of Nutrition, volume 137, number 10, pages 2229-2233, 2007.
 
Abstract:
Cassava, a staple food in sub-Saharan Africa, does not provide adequate amounts of pro-vitamin A (VA) carotenoids and has been targeted for biofortification (i.e. selectively breeding cultivars of increased nutrient density with agroeconomically acceptable characteristics). However, the accessibility of pro-VA carotenoids for absorption in different cultivars of cassava remains unknown. Here, we used the coupled in vitro digestion/Caco-2 cell uptake model to screen the relative accessibility of {\ss}-carotene ({\ss}C) in 10 cultivars of cassava with varying concentrations of {\ss}C. After cooking (boiled for 30 min), the {\ss}C concentration in tubers from different cultivars ranged from less than detectable to 6.9 {\"i}¿½g {\ss}C/g cassava. Samples were subjected to simulated oral, gastric, and small intestinal digestion to determine stability and micellarization of {\ss}C. All-trans {\ss}C, 9-cis {\ss}C, and 13-cis {\ss}C were the most abundant carotenoids in cooked cassava and recoveries after digestion exceeded 70%. Efficiency of micellarization of total {\ss}C was 30 {\"i}¿½ 2% for various cultivars with no significant difference in isomers and linearly proportional to concentration in cooked cassava (r = 0.87; P < 0.001). Accumulation of all-trans {\ss}C by Caco-2 cells incubated with the diluted micelle fraction for 4 h was proportional (R2 = 0.99; P < 0.001) to the quantity present in micelles. These results suggest that all-trans {\ss}C content appears to provide the key selection marker for breeding cassava to improve VA status and that the more complicated screening procedure using in vitro digestion coupled to cell uptake does not provide additional information on potential bioavailability.

Cassava improvement in sub-Saharan Africa: contributions of IITA and its partners, Dixon, A., Okechukwu, R., Ssemakula, G., Hanna, R., Thresh, J. M., Hughes, J., Ingelbrecht, I., Fregene, M.*, Legg, J., Mahungu, N., Nweke, F., Ntawuruhunga, P., Fauquet, C., Manyong, V., Neuenschwander, P., Whyte, J., Wydra, K., Asiedu, R., Egesi, C. N.*, Bandyopadhyay, R., Winter, S., Tarawali, G., Bokanga, M., Ezedinma, C., Sanni, L., Ferguson, M., Ogbe, F., Akoroda, M., Maziya-Dixon, B., Ilona, P., Ekanayake, I. J., Ariyo, O., Onyeka, J.*, Otim-Nape, G.*, Dahniya, M. T., Ortiz, R., Hahn, S. K. and Hartmann, P., 2008.
 
Abstract:
Cassava improvement in sub-Saharan Africa: contributions of IITA and its partners Dixon, A.G.O., R.U. Okechukwu, G. Ssemakula, R. Hanna, J.M. Thresh, J.d'A. Hughes, I. Ingelbrecht, M. Fregene, J. Legg, N. Mahungu, F. Nweke, J.P. Legg, P. Ntawuruhunga, C. Fauquet, V. Manyong, P. Neuenschwander, J. Whyte, K. Wydra, R. Asiedu, C.N. Egesi, R. Bandyopadhyay, S. Winter, G. Tarawali, M. Bokanga, C. Ezedinma, L. Sanni, M. Ferguson, F.O. Ogbe, M. Akoroda, B. Maziya-Dixon, P. Ilona, I.J. Ekanayake, O. Ariyo, J. Onyeka, G.W. Otim-Nape, M.T. Dahniya, R. Ortiz, S.K. Hahn and P. Hartmann Cassava is well recognized for its capacity to address food needs of vulnerable communities in unstable environments in SSA. IITA and colleagues in African NARS, in collaboration with CIAT and ARIs have played leading roles in the development of improved cassava varieties which are disease and pest resistant, early maturing, and high yielding. Through a combination of conventional and new approaches, over 400 cassava genotypes have been developed. The characteristics of the new generation of cassava germplasm broke what had been an apparent yield barrier in cassava improvement increasing yields in many locations by at least 50-100% without the use of fertilizer. The improved germplasm is shared with NARS within the region as specific genotypes or improved seed populations for evaluation and selection under local conditions. Improvement programs in Africa that received these materials have tested them under local conditions, selected varieties that outperform local varieties, and released them to farmers in virtually every major cassava producing country. Today, about 30% of the area cropped with cassava in Africa is planted with improved varieties. Without the introduction of more productive cultivars with multiple diseases and pest resistance, the effective biological control of the cassava mealybug and, to a certain extent, of the green mite, cassava production in SSA would be 50% or less of what it is today. That translates to over 13 million tons of dry cassava/year, enough to meet the calorie requirements of 65 million people. The significant gains in the crop's output in farmers' fields are not only contributing to the African diet but also propelling commercialization of the crop. This paper highlights contributions to cassava improvement in SSA since 1970 by IITA and its partners, and suggests areas needing strengthening in the drive to produce better crop varieties for different regions and enduses in Africa.

Challenges and lessons when using farmer knowledge in agricultural research and development projects in Africa, Van Asten, P., Kaaria, S., Fermont, A. and Delve, R. J., in: Experimental Agriculture, volume 45, number 1, pages 1-14, ISSN 0014-4797, 2009. [DOI]
 
Abstract:
Farmer participatory research (FPR) approaches are now considered mainstream and are especially applicable for developing appropriate technology options in complex, diverse and risk-prone regions, where local adaptations are crucial. Although the advantages of using farmer knowledge to guide scientific research are numerous and well documented, the challenges and potential pitfalls that befall biophysical researchers, in particular, when using FPR approaches have received much less attention, especially in sub-Saharan Africa. Our experiences show that in certain cases, the methods used to collect farmer knowledge are flawed, leading to inaccurate or incomplete information being gathered. This potentially leads to the development and promotion of unsustainable, unprofitable or socially unacceptable technologies. This paper uses a series of examples to illustrate that discrepancies between farmer and researcher observations may occur because (i) farmers and scientists may not have sufficient insight into the systems complexity, (ii) farmers and scientists use different reference frameworks, and (iii) methodological errors may lead to farmers intentionally or unintentionally providing false or {\^a}??desired{\^a}?? information to achieve (short-term) benefits. This paper concludes by providing guidelines to improve the integration of farmer and scientific knowledge in order to develop appropriate technology options that are both environmentally sound and adaptable to local conditions

Genetic gains from 30 years of cassava breeding in Nigeria for storage root yield and disease resistance in elite cassava genotypes, Okechukwu, R. and Dixon, A., in: Journal of Crop Improvement, volume 22, number 2, pages 181-208, 2008.
 
Abstract:
Cassava (Manihot esculenta Crantz) is crucial for both food security and poverty alleviation in Sub-Saharan Africa (SSA). Cassava improvement for SSA started at the International Institute of Tropical Agriculture in 1970, and several improved lines with different characteristics have been developed to date. The primary focus of breeding work has been to increase root yield, early bulking, tolerance to biotic and abiotic stresses, and increased dry matter content. This paper represents a study of 112 varieties cloned and introduced between 1970 and 2000, and evaluated in 2003 and 2004 to quantify genetic gains in root yield and disease resistance. The genetic gain per year was 1.3% for fresh root yield, 1.2% for dry root yield, 0.65% for cassava mosaic disease resistance, 0.21% for cassava anthracnose disease resistance, and -0.03% for cassava bacterial blight disease resistance. Though there was no statistical significance in the net negative genetic gain in cassava bacterial blight resistance, it is essential that more emphasis be placed on improving this trait to enhance stability and productivity in African environments.

Insecticide dissipation from soil and plant surfaces in tropical horticulture of southern Benin, West Africa, Rosendahl, I., Laabs, V., Atcha-Ahove, C.*, James, B. and Amelung, W., in: Journal of Environmental Monitoring, volume 11, pages 1157-1164, ISSN 1464-0325, 2009.
 
Abstract:
In Sub-Saharan Africa, horticulture provides livelihood opportunities for millions of people, especially in urban and peri-urban areas. Although the vegetable agroecosystems are often characterized by intensive pesticide use, risks resulting therefrom are largely unknown under tropical horticultural conditions. The objective of this study therefore was to study the fate of pesticides in two representative horticultural soils (Acrisol and Arenosol) and plants (Solanum macrocarpon L.) after field application and thus to gain first insight on environmental persistence and dispersion of typical insecticides used in vegetable horticulture in Benin, West Africa. On plant surfaces, dissipation was rapid with half lives ranging from 2 to 87 h (a-endosulfan < b-endosulfan < deltamethrin). Soil dissipation was considerably slower than dissipation from plant surfaces with half-lives ranging from 3 (diazinon) to 74 d (total endosulfan), but persistence of pesticides in soil was still reduced compared to temperate climates. Nevertheless, for deltamethrin and endosulfan, a tendency for mid-term accumulation in soil upon repeated applications was observed. The soil and plant surface concentrations of the metabolite endosulfan sulfate increased during the entire trial period, indicating that this compound is a potential long-term pollutant even in tropical environments.

Phytoseiid mites of the tribe Paraseiulini Wainstein (Acari: Phytoseiidae) from sub-Saharan Africa, De Moraes, G.*, Zannou, I., Ueckermann, E.*, Oliveira, A.*, Hanna, R. and Yaninek, J., in: Zootaxa, volume 1687, pages 1-34, ISSN 1175-5326, 2008.
 
Abstract:
This is the eighth publication of a series on the determination of phytoseiid mites of sub-Saharan Africa. Twenty-three phytoseiid species of the tribe Paraseiulini Wainstein are reported in this paper. They refer to all species of this tribe known to occur in sub-Saharan Africa. Six of these species are described for the first time and 13 species are redescribed. Most of the reported species were collected in cassava habitats in tropical Africa and in other habitats in South Africa. A key is included to help in the separation of the species treated in this paper.

Prospects for cassava breeding in sub-Saharan Africa in the next decade, Dixon, A. and Ssemakula, G., in: Journal of Food, Agriculture and Environment, volume 6, number 3&4, pages 132-138, ISSN 1459:0255, 2008.
 
Abstract:
Cassava is an appropriate commodity to feature in Africa's future economic development. As the crop rapidly changes from a basic foodstuff to a source of income and employment for rural populations, there is a parallel need to increase productivity, marketing opportunities and profitability. This calls for development and/or the introduction of technologies that will drive down costs of production, harvesting, processing and marketing to make cassava competitive with other raw materials and improve the quantity and quality of cassava products for diversified uses. The development and delivery/promotion of productivity-enhancing technologies and adding value will attract urban consumers and industries, create demand, stimulate increased production and provide more income for producers, processors and traders. This paper highlights prospects for cassava breeding in sub-Saharan Africa in the next decade with a view to meeting these challenges.

Responding to food supply shocks through global partnerships in technology development and transfer: the case of the IITA-led biological control of cassava mealybug in sub-Saharan Africa, Alene, A., Manyong, V. and Coulibaly, O., in: Outlook on Agriculture, volume 35, number 4, pages 255-261, ISSN 0030-7270, 2006.
 
Abstract:
Partnerships involving national agricultural research systems (NARS), the Consultative Group on International Agricultural Research (CGIAR), universities, advanced research institutes, the private sector, civil society, non-governmental organizations, farmer organizations and international investors represent a global capacity to provide solutions to strategic problems and to fulfil the overall objective of combating rural poverty and food insecurity. Drawing on the experiences and achievements of the IITA-led biological control of the cassava mealybug in Sub-Saharan Africa, this paper gives an account of the role of global partnerships in technology development and transfer in addressing food security challenges. It concludes with implications for national and international agricultural research centres for an efficient, demand-driven technology development and delivery.

Somatic embryogenesis and genetic transformation of African farmer-grown cassava genotypes that are susceptible to the Cassava Brown Streak Disease, Ingelbrecht, I., Raji, A., Oyelakin, O., Winter, S., Moller, B., Dixon, A. and Jorgensen, K., 2008.
 
Abstract:
Cassava is one of the most important sources of carbohydrates for over 500 million people in the (sub)tropics. Cassava plays an important role in the food security of many developing nations, especially in sub-Saharan Africa (SSA). Cassava is highly heterozygous, genetically complex, and many varieties either do not flower or produce few seeds thus hampering conventional crop improvement. Several major constraints limit the production and utilization of cassava roots, including two viral diseases, the Cassava Brown Streak Disease (CBSD) and the Cassava Mosaic Disease (CMD), which are specific to SSA. Farmer-preferred landraces are often susceptible to CBSD and/or CMD. Genetic transformation of cassava could complement conventional breeding programs for CBSD and/or CMD resistance. Current protocols for genetic transformation of cassava are limited to model genotypes which are not used by farmers of breeders in SSA. Since transformation protocols are genotype-dependent, suitable procedures for genetic modification of the landraces need to be developed. We have established somatic embryogenesis and organogenesis for three farmer/breeder-preferred varieties, two from East Africa (cv Kibaha and cv Albert) and one from West Africa (TME12) which are susceptible to CBSD. Primary and cyclical somatic embryogenesis was established for the three varieties. Cotyledon tissues from somatic embryos were used as source explants for Agrobacterium-mediated genetic transformation. Using an intron-interrupted {\^a}{\"i}¿½glucuronidase reporter gene construct under control of the Cassava vein mosaic virus promoter, stably transformed cassava tissues and plants were obtained. Molecular evidence for stable expression of the transgenes will be presented.

The impact of agricultural research on productivity and poverty in sub-Saharan Africa, Alene, A. and Coulibaly, O., in: Food Policy, volume 34, number 2, pages 198-209, ISSN 0306-9192, 2009.
 
Abstract:
While it is widely recognized that agricultural research is a key driver of broad-based technological change in agriculture that benefits the poor in many different ways, little is known about its aggregate impacts on productivity growth and poverty reduction in sub-Saharan Africa (SSA). Using a polynomial distributed lag structure for agricultural research within a simultaneous system of equations framework,this paper first demonstrates that agricultural research contributes significantly to productivity growth in SSA. Productivity growth is again shown to raise per capita incomes, with income increases finally having significant poverty-reducing effects. With an aggregate rate of return of 55%, the payoffs to agricultural research are also impressive. Agricultural research currently reduces the number of poor by 2.3 million or 0.8% annually. While the actual impacts are not large enough to more than offset the poverty-increasing effects of population growth and environmental degradation, the potential impacts of agricultural research are far greater. Apart from low research investments, SSA faces several constraints outside the research system that hinder realization of potential research benefits. The results show that doubling research investments in SSA would reduce poverty by 9% annually. However, this would not be realized without more efficient extension, credit, and input supply systems.