Descubre y comparte nuestro conocimiento público

Se han encontrado 27 recursos

Resultados de búsqueda

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
Enlace permanente
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
Enlace permanente
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 1988

Autor: Jackai, L.E.N. Raulston, J.R.

Several diets were tested for rearing the legume pod borer, Maruca testulalis (Geyer). After initial selection of a soyflour‐based diet, further research was conducted to determine whether cowpea flour could be substituted for soyflour. Three levels of cowpea flour were tested; 25, 38 and 50 g of...

Enlace original: https://cgspace.cgiar.org/handle/10568/96335

Investigación en Agricultura
Enlace permanente

Jackai, L.E.N. ,  Raulston, J.R. ,  [Rearing the legume pod borer, Maruca testulalis, Geyer (Lepidoptera: Pyralidae) on artificial diet] ,  Rearing the legume pod borer, Maruca testulalis, Geyer (Lepidoptera: Pyralidae) on artificial diet
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
Enlace permanente
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 2007

Autor: Oluwafemi, S. Jackai, L.E.N. Alegbejo, M.D.

Four Cicadulina species [Cicadulina arachidis China, Cicadulina dabrowskii Webb, Cicadulina mbila (Naude), and Cicadulina storeyi China (Homoptera: Cicadellidae)] found during field surveys in 1997–1999 across five ecological zones in Nigeria were reared in screenhouses and females were used in a...

Enlace original: https://cgspace.cgiar.org/handle/10568/91468

Investigación en Agricultura
MSV
Enlace permanente
Oluwafemi, S. ,  Jackai, L.E.N. ,  Alegbejo, M.D. ,  [Comparison of transmission abilities of four Cicadulina species vectors of maize streak virus from Nigeria] ,  Comparison of transmission abilities of four Cicadulina species vectors of maize streak virus from Nigeria
Journal Article 1988

Autor: Jackai, L.E.N. Singh, S.

As research on food crops intensifies in the tropics, the spotlight is being increasingly focused on the development of varieties with resistance to pests and diseases. Much of the time, money and patience needed to conduct research on host plant resistance (HpR) is spent on the development of me...

Enlace original: https://cgspace.cgiar.org/handle/10568/98633

Investigación en Agricultura
Enlace permanente
Jackai, L.E.N. ,  Singh, S. ,  [Screening techniques for host plant resistance to cowpea insect pests] ,  Screening techniques for host plant resistance to cowpea insect pests
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
Enlace permanente
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 1999

Autor: Omitogun, O. Jackai, L.E.N. Thottappilly, G.

Insecticidal lectins were isolated from 20 resistant Vigna and non‐Vigna legumes and tested againstn 3 pests of cowpea namely: Maruca vitrata, Callosobruchus maculatus and Clavigralla tomentosicollis. Crude lectins were separated from seeds using sodium chloride extraction, ammonium sulfate fract...

Enlace original: https://cgspace.cgiar.org/handle/10568/95952

Investigación en Agricultura
Enlace permanente
Omitogun, O. ,  Jackai, L.E.N. ,  Thottappilly, G. ,  [Isolation of insecticidal lectinenriched extracts from African yam bean (Sphenostylis stenocarpa) and other legume species] ,  Isolation of insecticidal lectinenriched extracts from African yam bean (Sphenostylis stenocarpa) and other legume species
Journal Article 2004

Autor: Koona, P. Osisanya, E. Jackai, L.E.N. Tonye, J.

Potted cowpea, Vigna unguiculata (L.) Walp., plants were used to determine the effects of defoliation and pod position relative to the leaf canopy on infestation and damage by the coreid pod-bugs Clavigralla tomentosicollis Stål and Anoplocnemis curvipes (F.). Temperature measurements were taken ...

Enlace original: https://cgspace.cgiar.org/handle/10568/103372

Investigación en Agricultura
Enlace permanente
Koona, P. ,  Osisanya, E. ,  Jackai, L.E.N. ,  Tonye, J. ,  [Infestation and damage by Clavigralla tomentosicollis and Anoplocnemis curvipes (Hemiptera: Coreidae) in cowpea plants with modified leaf structure and pods in different positions relative to the canopy] ,  Infestation and damage by Clavigralla tomentosicollis and Anoplocnemis curvipes (Hemiptera: Coreidae) in cowpea plants with modified leaf structure and pods in different positions relative to the canopy
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
Enlace permanente
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

Selecciona los documentos para visualizarlos

Nombre del archivo Ver recurso
Marcar todos
Limpiar todo