https://hdl.handle.net/20.500.12478/4 2026-06-30T07:42:38Z 2026-06-30T07:42:38Z Dalaa, M.A. Kofituo, R.K. Asare, R. https://hdl.handle.net/20.500.12478/6881 2020-06-27T02:01:18Z 2019-01-01T00:00:00Z

Climate smart stepwise investment pathway for cocoa farmers in Ghana Dalaa, M.A.; Kofituo, R.K.; Asare, R.

2019-01-01T00:00:00Z Glimer, R. https://hdl.handle.net/20.500.12478/5133 2020-02-20T13:43:58Z 1973-01-01T00:00:00Z

Epidemiology and control of cowpea mosaic in Western Nigeria Glimer, R. Cowpea mos1aic is a serious virus disease of cowpea in the Ibadan area. Disease incidence may reach 80% at harvest. The disease also occurs in soybean, sword bean, Mexican yam bean, and lima bean. Two well-defined disease syndromes occur in cowpea: a bright yellow fleck or mosaic (YF type) and a green mott1e with leaf distortion and puckering (GB type). GB type isolates are general1y more injurious than YF type isolates, but the two are closely related serologically to each other and to a CPMV isolate from Arkansas, USA. Economic injury to cowpea depends on three factors: virus isolate, tolerance of the infected cowpea cultivar, and most important, age of the host plant at time of infection. Early infections (7 days after emergence) reduce yields ~y 40-60% but late infections (after flowering) cause reductions of duly 5-10%. The virus is transmitted through seeds from infected plants (about 1-5%) and such infections appear to supply inoculum for secondary spread in the field. In addition to the known vector, Ootheca mutabi1is several new vectors have recently been identified: two beetles, Luperodes lineata and Nematocerus ac rbus, the grasshoppers Zonocerus variegatus and Catantops spissus, and t e thrips Sericothrips occipitalis and Taeniothrips sjostedti. The most Beasib1e means of control of the disease is the use of host immunity, present in several cowpea cultivars. Preliminary data indicate that more than one recessive gene is involved. Breeding programs will be complicated,to some extent, by differences in pathogenicity of virus isolates.

1973-01-01T00:00:00Z Caveness, F.E. https://hdl.handle.net/20.500.12478/5132 2020-02-20T13:43:57Z 1973-01-01T00:00:00Z

Nematode attack on cowpeas in Nigeria Caveness, F.E. Cowpeas are attacked by 24species of nematodes distributed among 15 general. Fifteen of these 24 species of plant-parasitic nematodes have been founding Nigeria. The most destructive on local cowpea are three species of the root-knot nematode. The root-knot nematodes are also the most wide spreading Nigeria being found abundantly in all states. The reinform nematode has also been proved capable of reducing cowpea yields in Nigeria and is widely distributed. Both kinds of nematode scan cause yield reductions of 20 to 30percent.Thelife cycles of the root-knot nematodes and the reniform nematode have been studied for Nigeria and are essentially the same as reported in the literature for other tropical countries.

1973-01-01T00:00:00Z Vanlauwe, Bernard Sanginga, N. https://hdl.handle.net/20.500.12478/4594 2020-02-20T12:43:09Z 2015-09-01T00:00:00Z

IITA, the lead research partner facilitating agricultural solutions to overcome hunger and poverty in subSaharan Africa: the critical role of appropriate soil fertility and land use management Vanlauwe, Bernard; Sanginga, N. For IITA to thrive and meet the expectations of the wider agricultural community in sub-Sahara Africa it must: (i) continue to occupy the Research for Development (R4D) high ground and raise its profile among local and international partners; (ii) conduct rigorous, well-focused research and assure its delivery to end users; (iii) manage its human, physical and financial resources more effectively and (iv) expand its partnership with both the public and private sectors and more convincingly advocate for needed policy change at many levels across the continent. These are challenging goals, and closing the yield gaps of key commodities in a sustainable manner, as referred to in our Refreshed Strategy 2012–2020, requires doubling the current human and financial resources available to IITA over the next eight years. During the past four years. IITA has increased its funding from the $47 million in 2011 to $143 million today and the number of international staff from the 115 to 230. It is making progress with its partners to raise over 11 million Africans out of poverty and redirect over 7.5 million hectares of under-utilised, marginal and degraded lands to more productive and sustainable use, and guided by and contributing to the four System Level Outcomes (SLOs) as defined by the CGIARhreducing rural poverty, increasing food security, correcting under-nutrition, and promoting more sustainable management of natural resources. IITA has prioritised formulation and delivery of its R4D products. As the Dalberg review commissioned by the CGIAR Consortium Board concludes, the CGIAR has fallen short of effectively translating its excellent science into impact on the rural poor. IITA has recently achieved several research breakthroughs from its core research projects that have the potential to greatly improve the lives and livelihood of these clients. Furthermore, IITA is fine-tuning its delivery systems as indicated through the early achievements of our Business Incubation Platform (BIP) and its Aflasafe, Nodumax and GoSeed product lines. IITA is refining its strategy to direct rural youth from diverse competencies toward agribusiness careers through the Youth in Agribusiness (IYA) program. We are engaging the private sector and strengthening our partnership with National Agricultural Research Institutions (NARIs) and regional organisations by establishing and coordinating major platforms such as the West Africa Biosciences platform; the Pan-African Platform for Soil Research for Development and a Regional Research and Training Centre to link climate change with biodiversity and biotic stresses.

2015-09-01T00:00:00Z