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Journal Article 1991

Autor: Jackai, L.E.N.

Two resistance screening assays were developed for evaluating cowpea Vigna unguiculata (L.) Walp resistance to the legume pod borer (MPB), Maruca testulalis Geyer, one of the most intractable pest problems of this important food crop. The first assay, the dual-choice arena test (DCAT), provided a...

Enlace original: https://cgspace.cgiar.org/handle/10568/101728

Investigación en Agricultura
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Jackai, L.E.N. ,  [Laboratory and screenhouse assays for evaluating cowpea resistance to the legume pod borer] ,  Laboratory and screenhouse assays for evaluating cowpea resistance to the legume pod borer
Journal Article 1990

Autor: Jackai, L.E.N.

A laboratory screening method was developed for evaluating resistance of cowpea, Vigna unguiculata (L.) Walp, to Clavigralla tomentosicollis Stål. The technique uses dry cowpea seeds, which were judged better than fresh seeds or fresh pods, to identify protracted nymphal development and high coho...

Enlace original: https://cgspace.cgiar.org/handle/10568/101840

Investigación en Agricultura
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Jackai, L.E.N. ,  [Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae)] ,  Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae)
Journal Article 2003

Autor: Alabi, O.Y. Odebiyi, J.A. Jackai, L.E.N.

Ten cowpea cultivars were screened for resistance to flower bud thrips, Megalurothrips sjostedti, in replicated field trials. Resistance was evaluated by measuring differences in populations and visual damage on the cultivars. Statistical correlation was employed to assess the degree of associati...

Enlace original: https://cgspace.cgiar.org/handle/10568/98142

Investigación en Agricultura
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Alabi, O.Y. ,  Odebiyi, J.A. ,  Jackai, L.E.N. ,  [Field evaluation of cowpea cultivars (Vigna unguiculata L Walp.) for resistance to flower thrips (Megalurothrips sjostedti Trybom) (Thysanoptera: Thripidae)] ,  Field evaluation of cowpea cultivars (Vigna unguiculata L Walp.) for resistance to flower thrips (Megalurothrips sjostedti Trybom) (Thysanoptera: Thripidae)
Journal Article 1997

Autor: Umoren, U.E. Tewe, O.O. Bokanga, M. Jackai, L.E.N.

A comparative study was conducted with four improved cowpea (2 pod bug resistant and 2 susceptible) varieties to assess the effect of autoclaving at 105 ~ under 15 psi for 30 min on their protein quality, as measured by the levels of some antinutritional factors and performance of rats fed the di...

Enlace original: https://cgspace.cgiar.org/handle/10568/98693

Investigación en Agricultura
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Umoren, U.E. ,  Tewe, O.O. ,  Bokanga, M. ,  Jackai, L.E.N. ,  [Protein quality of raw and autoclaved cowpeas: Comparison between some insect resistant and susceptible varieties] ,  Protein quality of raw and autoclaved cowpeas: Comparison between some insect resistant and susceptible varieties
Journal Article 1991

Autor: Afun, J. Jackai, L.E.N. Hodgson, C.

‘Monitored' sprays are applied when the action threshold (AT) has been reached or exceeded, based on monitoring of crop damage or pest infestation, whereas ‘calendar' sprays are applied at specific days after planting without taking into account continued presence or absence of the pest. In this ...

Enlace original: https://cgspace.cgiar.org/handle/10568/98629

Investigación en Agricultura
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Afun, J. ,  Jackai, L.E.N. ,  Hodgson, C. ,  [Calendar and monitored insecticide application for the control of cowpea pests] ,  Calendar and monitored insecticide application for the control of cowpea pests
Journal Article 2000

Autor: Asante, Stephen K. Jackai, L.E.N. Tamo, M.

Field surveys were conducted on cowpea and pigeon pea in 1995 and 1996 to assess the effect of indigenous egg parasitoids on populations of Clavigralla tomentosicollis Stål in northern Nigeria. From the egg masses of C. tomentosicollis, three species of Hymenoptera belonging to three families, na...

Enlace original: https://cgspace.cgiar.org/handle/10568/99837

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Asante, Stephen K. ,  Jackai, L.E.N. ,  Tamo, M. ,  [Efficiency of Gryon fulviventris (Hymenoptera: Scelionidae) as an egg parasitoid of Clavigralla tomentosicollis Stal. (Hemiptera: Coreidae) in northern Nigeria] ,  Efficiency of Gryon fulviventris (Hymenoptera: Scelionidae) as an egg parasitoid of Clavigralla tomentosicollis Stal. (Hemiptera: Coreidae) in northern Nigeria
Journal Article 1992

Autor: Jackai, L.E.N. Inang, E.E. Nwobi, P.

The insecticidal activity of neem, Azadirachta indica A. Juss., was tested on two major cowpea pests using different concentrations of aqueous extracts, and powders of both neem seed and kernel. The pests were larvae of Maruca testulalis Geyer (Lepidoptera: Pyralidae), the legume pod borer and Cl...

Enlace original: https://cgspace.cgiar.org/handle/10568/100038

Investigación en Agricultura
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Jackai, L.E.N. ,  Inang, E.E. ,  Nwobi, P. ,  [The potential for controlling postflowering pests of cowpea, Vigna unguiculata Walp., using neem, Azadirachta indica A. Juss] ,  The potential for controlling postflowering pests of cowpea, Vigna unguiculata Walp., using neem, Azadirachta indica A. Juss
Journal Article 1991

Autor: Oghiakhe, S. Jackai, L.E.N. Makanjuola, W.A.

The effects of cowpea, Vigna unguiculata (L.) Walp. canopy structure and pod position in relation to infestation and damage by the legume pod borer, Maruca testulalis Geyer were investigated. Defoliated cultivars sustained significantly less infestation and damage (P < 0.05) than those undefoliat...

Enlace original: https://cgspace.cgiar.org/handle/10568/100052

Investigación en Agricultura
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Oghiakhe, S. ,  Jackai, L.E.N. ,  Makanjuola, W.A. ,  [Cowpea plant architecture in relation to infestation and damage by the legume pod borer, Maruca testulalis Geyer (Lepidoptera: Pyralidae) 1. effect of canopy structure and pod position] ,  Cowpea plant architecture in relation to infestation and damage by the legume pod borer, Maruca testulalis Geyer (Lepidoptera: Pyralidae) 1. effect of canopy structure and pod position
Journal Article 1992

Autor: Oghiakhe, S. Jackai, L.E.N. Makanjuola, W.A.

The possibility of the involvement of pod wall toughness in the resistance of cowpea, Vigna unguiculata (L.) Walp., to the legume pod borer, Maruca testulalis was studied. The toughness of non-intact and intact pod wall increased with age, but the rate varied at different growth stages of the pod...

Enlace original: https://cgspace.cgiar.org/handle/10568/100051

Investigación en Agricultura
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Oghiakhe, S. ,  Jackai, L.E.N. ,  Makanjuola, W.A. ,  [Podwall toughness has no effect on cowpea resistance to the legume pod borer] ,  Podwall toughness has no effect on cowpea resistance to the legume pod borer
Journal Article 1992

Autor: Jackai, L.E.N. Inang, E.E.

The growth and development of Clavigralla tomentosicollis Stäl (Hemiptera: Coreidae) and Maruca testulalis Geyer (Lepidoptera: Pyralidae) were studied under laboratory conditions using three cultivated Vigna varieties (IT84E‐124, TVu 1890, MRx 10‐85S) and one wild variety (TVNu 72) under a range ...

Enlace original: https://cgspace.cgiar.org/handle/10568/100039

Investigación en Agricultura
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Jackai, L.E.N. ,  Inang, E.E. ,  [Development profiles of two cowpea pests on resistant and susceptible Vigna genotypes under constant temperatures] ,  Development profiles of two cowpea pests on resistant and susceptible Vigna genotypes under constant temperatures

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