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Journal Article 2004

Autor: Okechukwu, R.U. Ekpo, E.J.

The development of resistant crop varieties depends on the reliability of the method of screening for resistance. One of the techniques widely used in evaluating field resistance is the field screening method. However, most cowpea varieties regarded as having field resistance are often found to b...

Enlace original: https://cgspace.cgiar.org/handle/10568/103364

Investigación en Agricultura
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Okechukwu, R.U. ,  Ekpo, E.J. ,  [Sources of resistance to cowpea bacterial blight disease in Nigeria] ,  Sources of resistance to cowpea bacterial blight disease in Nigeria
Journal Article 2007

Autor: Dixon, A. Akoroda, M.O. Okechukwu, R.U. Ogbe, F. Ilona, P. Sanni, L.O. Ezedinma, C. Lemchi, J. Ssemakula, G.N. Yomeni, M. Okoro, E. Tarawali, G.

The aim of the Integrated Cassava Project (ICP) of the International Institute of Tropical Agriculture was to pre-emptively manage the cassava mosaic disease (CMD) to avert an imminent and increasing possible threat of the Ugandan strain of the CMD virus of the pathogen from doing damage to the N...

Enlace original: https://cgspace.cgiar.org/handle/10568/91456

Investigación en Agricultura
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Dixon, A. ,  Akoroda, M.O. ,  Okechukwu, R.U. ,  Ogbe, F. ,  Ilona, P. ,  Sanni, L.O. ,  Ezedinma, C. ,  Lemchi, J. ,  Ssemakula, G.N. ,  Yomeni, M. ,  Okoro, E. ,  Tarawali, G. ,  [Fast track participatory approach to release of elite cassava genotypes for various uses in Nigerias cassava economy] ,  Fast track participatory approach to release of elite cassava genotypes for various uses in Nigerias cassava economy
Journal Article 2010-03-18

Autor: Okechukwu, R.U. Ekpo, E.J.A. Okechukwu, O.C.

Seed transmission of Xanthomonas campestris pv. vignicola was investigated to ascertain the importance of seed as a primary source of inoculum for bacterial blight disease in cowpea. The study was carried out using seeds of five cowpea varieties (TVx 12349, IT86D-721, IT82D-889, Ife Brown and TVx...

Enlace original: https://cgspace.cgiar.org/handle/10568/87973

Investigación en Agricultura
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Okechukwu, R.U. ,  Ekpo, E.J.A. ,  Okechukwu, O.C. ,  [Seed to plant transmission of Xanthomonas campestris pv. vignicola isolates in cowpea] ,  Seed to plant transmission of Xanthomonas campestris pv. vignicola isolates in cowpea
Journal Article 2011

Autor: Okechukwu, R.U. Kehinde, I.A. Afolabi, C. James, B. Egesi, Chiedozie N.

Eleven improved varieties project were multiplied in 2009 by primary producers associated with the USAID/ IITA project Unleashing the Power of Cassava in Africa in response to the Food Price Crisis (UPoCA) in seven States of Nigeria. In 2010, stems from these multiplication farms were distributed...

Enlace original: https://cgspace.cgiar.org/handle/10568/81157

Investigación en Agricultura
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Okechukwu, R.U. ,  Kehinde, I.A. ,  Afolabi, C. ,  James, B. ,  Egesi, Chiedozie N. ,  [Distribution of improved varieties of cassava and potential impact on root yield and disease reduction in Nigeria] ,  Distribution of improved varieties of cassava and potential impact on root yield and disease reduction in Nigeria
Journal Article 2008

Autor: Okechukwu, R.U. Ekpo, E.

Field and laboratory experiments were conducted in the Sudan savanna site of IITA's experimental Station, Minjibir, Kano State, to study the survival of Xanthomonas campestris pv. vignicola in infested soil, cowpea seed, and debris. The experiment was conducted in a randomised complete block desi...

Enlace original: https://cgspace.cgiar.org/handle/10568/90917

Investigación en Agricultura
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Okechukwu, R.U. ,  Ekpo, E. ,  [Survival of Xanthomonas campestris pv. vignicola in infested soil, cowpea seed and cowpea debris] ,  Survival of Xanthomonas campestris pv. vignicola in infested soil, cowpea seed and cowpea debris
Journal Article 2006

Autor: Ogbe, F. Dixon, Alfred G.O. Hughes, J.D. Alabi, O.J. Okechukwu, R.U.

A diagnostic survey was conducted in 2002-03 to determine the status of cassava mosaic begomoviruses in Nigeria and to ascertain if the virulent Ugandan variant of East African cassava mosaic virus (EACMV-Ug2) was present. Of the 418 farms visited, 48% had cassava with moderately severe or severe...

Enlace original: https://cgspace.cgiar.org/handle/10568/91370

Investigación en Agricultura
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Ogbe, F. ,  Dixon, Alfred G.O. ,  Hughes, J.D. ,  Alabi, O.J. ,  Okechukwu, R.U. ,  [Status of cassava begomoviruses and their new natural hosts in Nigeria] ,  Status of cassava begomoviruses and their new natural hosts in Nigeria
Journal Article 2011

Autor: Afolabi, C.G. Okechukwu, O.C. Kehinde, I.A. Okechukwu, R.U.

More cassava is grown in Nigeria than anywhere else, but production is still limited by several factors including root rot disease which is common in cassava growing areas. A survey was carried out to assess farmers’ fields for yield and root rot disease on cassava varieties in seven States of Ni...

Enlace original: https://cgspace.cgiar.org/handle/10568/88192

Investigación en Agricultura
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Afolabi, C.G. ,  Okechukwu, O.C. ,  Kehinde, I.A. ,  Okechukwu, R.U. ,  [Assessment of farmers' field for root rot disease on improved cassava varieties released in Nigeria] ,  Assessment of farmers' field for root rot disease on improved cassava varieties released in Nigeria
Journal Article 2011

Autor: Udensi, U.E. Tarawali, G. Favour, E.U. Asumugha, G.N. Ezedinma, C. Okoye, B.C. Okarter, C. Ilona, P. Okechukwu, R.U. Dixon, A.

Cassava is a dominant component in crop mixtures in South-Eastern Nigeria. It is a preferred food security crop among smallholder farmers, because it can tolerate drought, low soil fertility and its production requires minimum external inputs. Various constraints have been shown to affect the wid...

Enlace original: https://cgspace.cgiar.org/handle/10568/88156

Investigación en Agricultura
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Udensi, U.E. ,  Tarawali, G. ,  Favour, E.U. ,  Asumugha, G.N. ,  Ezedinma, C. ,  Okoye, B.C. ,  Okarter, C. ,  Ilona, P. ,  Okechukwu, R.U. ,  Dixon, A. ,  [Adoption of selected improved cassava varieties among smallholder farmers in SouthEastern Nigeria] ,  Adoption of selected improved cassava varieties among smallholder farmers in SouthEastern Nigeria
Journal Article 2011

Autor: James, B. Bramel-Cox, P.J. Witte, E.R. Asiedu, Robert Watson, D. Okechukwu, R.U.

Cassava has long been expected to play a key role in rural economic growth in Africa, but are we there yet? Although research partnerships have produced elite cassava varieties with 50% more yielding potential and demonstrated technologies to boost processing and marketing of cassava, the sub-sec...

Enlace original: https://cgspace.cgiar.org/handle/10568/88171

Investigación en Agricultura
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James, B. ,  Bramel-Cox, P.J. ,  Witte, E.R. ,  Asiedu, Robert ,  Watson, D. ,  Okechukwu, R.U. ,  [Expanding the application of cassava value chain technologies through UPoCA project] ,  Expanding the application of cassava value chain technologies through UPoCA project
Journal Article 2008

Autor: Onyeka, T.J. Owolade, O.F. Ogunjobi, A.A. Dixon, Alfred G.O. Okechukwu, R.U. Bamkefa, B.

Geo-referenced surveys were conducted in 2001 and 2003 to assess the prevalence and severity of cassava bacterial blight (CBB) and cassava anthracnose disease (CAD) in different agro-ecological zones of Nigeria. A total of 132 fields were visited in 2001 as follow: humid forest (HF) 42, derived s...

Enlace original: https://cgspace.cgiar.org/handle/10568/90883

Investigación en Agricultura
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Onyeka, T.J. ,  Owolade, O.F. ,  Ogunjobi, A.A. ,  Dixon, Alfred G.O. ,  Okechukwu, R.U. ,  Bamkefa, B. ,  [Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria] ,  Prevalence and severity of bacterial blight and anthracnose diseases of cassava in different agroecological zones of Nigeria

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