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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
Enlace permanente
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 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
Enlace permanente

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 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
Enlace permanente
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 2011-09

Autor: Kamara, A.Y. Tefera, H. Ewansiha, S.U. Ajeigbe, Hakeem A. Okechukwu, R.U. Boukar, O. Omoigui, L.O.

A field study was conducted to determine the rate of genetic improvement in grain and fodder yields and associated agronomic and physiological changes of determinate and semideterminate cowpea [Vigna unguiculata (L.) Walp.] genotypes developed in the Nigerian Sudan savannas in 1974 to 2004. Resul...

Enlace original: https://cgspace.cgiar.org/handle/10568/82675

Investigación en Agricultura
Enlace permanente
Kamara, A.Y. ,  Tefera, H. ,  Ewansiha, S.U. ,  Ajeigbe, Hakeem A. ,  Okechukwu, R.U. ,  Boukar, O. ,  Omoigui, L.O. ,  [Genetic gain in yield and agronomic characteristics of cowpea cultivars developed in the Sudan savannas of Nigeria over the past three decades] ,  Genetic gain in yield and agronomic characteristics of cowpea cultivars developed in the Sudan savannas of Nigeria over the past three decades

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