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Cowpea is a major food and cash crop in northern Nigeria, providing nutritious grain and a less expensive source of protein for both the rural poor and urban consumers. A number of improved varieties have been developed combining diverse plant type, and different maturity periods, with resistance...


Kamara, A.Y.Omoigui, L.O.Ewansiha, S.U.[Improving the productivity of cowpea in the savannas of northeast Nigeria through participatory evaluation and dissemination of improved varieties]Improving the productivity of cowpea in the savannas of northeast Nigeria through participatory evaluation and dissemination of improved varieties

A field study was conducted to determine the rate of genetic improvement in grain and fodder yields of cowpea genotypes developed in the Nigerian Sudan savannas from 1970 to 2004. Results showed that grain yield ranged from 568 kg/ha for an old variety TVX3236 to 1851 kg/ha for a recently release...


Kamara, A.Y.Ewansiha, S.U.Ajeigbe, Hakeem A.Okechukwu, R.U.Tefera, H.Boukar, O.Omoigui, L.O.[Improvements in grain and fodder yield of cowpea (Vigna unguiculata) varieties developed in the Sudan savannas of Nigeria over the past four decades]Improvements in grain and fodder yield of cowpea (Vigna unguiculata) varieties developed in the Sudan savannas of Nigeria over the past four decades
Dugje, I.Y.Ekeleme, F.Kamara, A.Y.Omoigui, L.O.Tegbaru, A.Teli, I.A.Onyibe, J.E.[Guide to safe and effective use of pesticides for crop production in Borno State, Nigeria]Guide to safe and effective use of pesticides for crop production in Borno State, Nigeria
Dugje, I.Y.Onyibe, J.F.Ekeleme, F.Kamara, A.Y.Tegbaru, A.Omoigui, L.O.Bassi, S.A.[Guide to certified seeds production in Borno State, Nigeria]Guide to certified seeds production in Borno State, Nigeria

Historically, conventional breeding has been the primary strategy used to develop a number of Striga-resistant varieties currently grown in the Sahel of Western Africa. In this study, we have successfully developed and applied a marker-assisted selection strategy that employs a single backcross p...


Omoigui, L.O.Kamara, A.Y.Moukoumbi, Y.D.Ogunkanmi, L.A.Timko, M.P.[Breeding cowpea for resistance to striga gesnerioides in the Nigerian dry savannas using marker-assisted selection]Breeding cowpea for resistance to striga gesnerioides in the Nigerian dry savannas using marker-assisted selection

Field trials were conducted in 2005 and 2006 in Tilla (northern Guinea savanna) and Sabon-Gari (Sudan savanna) in northeast Nigeria to determine the performance of two improved cowpea varieties when relay-intercropped with early and late maize, 6 and 8 weeks after planting the maize. Grain yield,...


Kamara, A.Y.Omoigui, L.O.Ewansiha, S.U.Ekeleme, F.Chikoye, D.Ajeigbe, Hakeem A.[Performance of semideterminate and indeterminate cowpeas relaycropped into maize in Northeast Nigeria]Performance of semideterminate and indeterminate cowpeas relaycropped into maize in Northeast Nigeria

Striga gesnerioides (Willd) Vatke is a significant constraint to cowpea production in the dry savannas of sub-Saharan Africa. Yield losses caused by S. gesnerioides in these regions are estimated in millions of tons annually and the prevalence of Striga soil infestation is steadily increasing. Co...


Omoigui, L.O.Ishiyaku, M.F.Ousmane, B.Gowda, B.S.Timko, M.P.[Application of fast technology for analysis (FTA) for sampling and recovery of deoxyribonucleic acid (DNA) for molecular characterization of cowpea breeding lines for Striga resistance]Application of fast technology for analysis (FTA) for sampling and recovery of deoxyribonucleic acid (DNA) for molecular characterization of cowpea breeding lines for Striga resistance

Cowpea is an important food crop in the dry savannas of West and Central Africa because of its high protein content. Yields are, however, considerably reduced by the parasitic angiosperm Striga gesnerioides. Field trials over 2 years in two localities in northeast Nigeria evaluated the performanc...


Kamara, A.Y.Chikoye, D.Ekeleme, F.Omoigui, L.O.Dugje, I.Y.[Field performance of improved cowpea varieties under conditions of natural infestation by the parasitic weed Striga gesnerioides]Field performance of improved cowpea varieties under conditions of natural infestation by the parasitic weed Striga gesnerioides

Cowpea is an important food legume and versatile crop in the savannas of northeast Nigeria. Despite the high potential for production in this region, insect pests are a major constraint. A study was conducted to evaluate the response of diverse cowpea genotypes to different schedules of spraying ...


Kamara, Y.Chikoye, D.Omoigui, L.O.Dugje, I.Y.[Influence of insecticide spraying regimes and cultivar on insect pests and yield of cowpea in the dry savannas of northeastern Nigeria]Influence of insecticide spraying regimes and cultivar on insect pests and yield of cowpea in the dry savannas of northeastern Nigeria

Parasitism of crop plants by Striga species is a major constraint in the savanna zones of West Africa. Farmers ranked Striga as a leading constraint during a livelihood analysis of 30 communities in northeast Nigeria. A field survey was conducted to ascertain the extent of infestation by Striga s...


Dugje, I.Y.Kamara, A.Omoigui, L.O.[Infestation of crop fields by Striga species in the savanna zones of northeast Nigeria]Infestation of crop fields by Striga species in the savanna zones of northeast Nigeria

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