Resultados de búsqueda - "Nigeria"

Seed transmissibility of Cucumber mosaic virus in Capsicum species por Arogundade, O., Balogun, O.S., Kumar, P. Lava

“…Accessions collected from eight states in Nigeria were evaluated to determine seed transmissibility of CMV in Capsicum species. …”
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Field studies on chlorophyll a fluorescence for low temperature tolerance testing of cassava (Manihot esculenta Crantz) por Togun, A.O., Akparobi, S.O., Ekanayake, I.J.

“…Fifteen cassava (Manihot esculentaCrantz) genotypes were grown at two field sites of Nigeria from 1994 to 1996 (Ibadan: 28±5°C, altitude 210 masl and Jos: 18±5°C, altitude of 1260 masl) to evaluate the use of chlorophyll fluorescence in screening for cold tolerance in cassava. …”
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Weed interference in maize, cowpea, maize/cowpea intercrop in a subhumid tropical environment. I. Influence of cropping season por Ayeni, A.O., Duke, W.B., Akobundu, I.O.

“…Field experiments were conducted in the early and late cropping seasons of 1979 on a loamysand Oxic Ustropept in a subhumid environment in Nigeria, using 40000, 50000 and 30000 + 40000 plants ha−1 of maize (Zea mays L. cv. …”
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Genetic variability for nutritional composition and cooking time of improved cowpea lines por Nielsen, S., Brandt, W., Singh, B.

“…This study was undertaken to estimate variability for protein content and cooking quality in 100 improved cowpea breeding lines grown in the field at Ibadan, Nigeria in 1986. Moisture, protein, fat, and ash content were determined by standard methods. …”
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Ecologically sustainable cassava plant protection (ESCaPP): a model for environmentally sound pest management in Africa por Yaninek, John S., James, B., Bieler, P.

“…The project is a collaborative effort between the International Institute of Tropical Agriculture (IITA), national plant protection staff, extension workers and farmers in Cameroon, Nigeria, Benin and Ghana, with a parallel component in Brazil involving Centro Internacional de Agricutura Tropical (CIAT) and Empresa Brasileira de Pesquisa Agropecüaria (EMBRAPA). …”
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Contribution of early season cowpea to late season maize in the savanna zone of West Africa por Carsky, R.J., Singh, B.B., Oyewole, B.

“…A study was conducted to estimate the contribution of the early season cowpea to late season maize during three years on two fields in central Kaduna State in northern Nigeria. Without insecticide application, early season cowpea grain yield averaged almost 500 kg ha−1 over all environments including a site where P deficiency was corrected in the second year. …”
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Heterotic affinity and combining ability of exotic maize inbred lines for resistance to aflatoxin accumulation por Meseka, S., Williams, W.P., Warburton, Marilyn L., Brown, R.L., Augusto, J., Ortega Beltran, A., Bandyopadhyay, Ranajit, Menkir, A.

“…The inbreds were crossed to two adapted testers representing two African heterotic groups and the resulting testcrosses along with hybrid checks were evaluated in separate trials at two locations for 2 years in Nigeria. General combining ability (GCA) effects were more important than specific combining ability effects for aflatoxin and grain yield. …”
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Genetic advance in grain yield and other traits in two tropical maize composites developed via reciprocal recurrent selection por Kolawole, A.O., Menkir, A., Blay, E., Ofori, K., Kling, J.

“…One hundred S1 lines, each derived from the original (C0) and advanced (C4) cycles of the two composites, were crossed in pairs to form 100 C0 × C0 and 100 C4 × C4 testcrosses, which were evaluated along with 10 commercial hybrid checks in a replicated trial across eight environments in Nigeria. The observed genetic gain was 3.60% cycle−1 for grain yield. …”
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Evaluation de nouvelles varieties digname en Cote dIvoire: bilan de trois annees dexperience avec des genotypes ameliores par lIITA por Ettien, J.B., Tschannen, A.B.

“…The clones tested have been selected by the IITA in Nigeria. The trials were run from 1999 to 2001 and 46 clones of Dioscorea cayenensis-rotundata and 16 of D. alata were evaluated in a experimental setup called "augmented design". …”
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Cassava improvement strategies for resistance to major economic diseases and pests in Africa por Hahn, S.K., Caveness, F.E., Terry, Eugene R., Oduro, K.A., Leuschner, K., Singh, T.P.

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Management of cogongrass Imperata cylindrica with velvetbean Mucuna pruriens var. utilis and herbicides por Udensi, U.E., Akobundu, I.O., Ayeni, A.O., Chikoye, David

“…Field experiments were conducted in 1992 to 1993 and in 1995 to 1996 in Ibadan, Nigeria, to assess the effect of velvetbean and herbicides on maize (corn) and cogongrass growth and to assess regrowth of the weed 1 yr after treatment. …”
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Some factors affecting soybean viability and emergence in the lowland tropics por Nangju, D., Wien, H.C., Singh, T.P.

“…Soil temperature up to 42 C during rainy season at Ibadan, Nigeria has been recorded, and 2 hours of 42C soil temperature was found to reduce hypocotyl extension by more than 70% in soybean. …”
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Evaluation of cowpea (Vigna unguiculata (L.) Walp.) landraces to bacterial blight caused by Xanthomonas axonopodis pv. vignicola por Durojaye, H.A., Moukoumbi, Y.D., Dania, V.O., Boukar, O., Bandyopadhyay, Ranajit, Ortega Beltran, A.

“…Resistance was detected in several CLR accessions with two accessions from Nigeria and one from the US developing no disease symptoms. …”
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Striga hermonthica seed inoculum rate effects on maize hybrid tolerance and susceptibility expression por Kim, S.K., Adetimirin, Victor O.

“…The experiment was conducted at two locations, Mokwa (two seasons) and Abuja (one season), in Nigeria. Increasing Striga inoculum level increased Striga emergence and the amount of damage to the host plant, plant height, and grain yield of the host crop. …”
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Nitrogen effects on Striga hermonthica infestation, grain yield and agronomic traits of tolerant and susceptible maize hybrids por Kim, S.K., Adetimirin, Victor O., Akintunde, A.Y.

“…The trials were conducted for 3 yr at Mokwa, Nigeria. Each plant was infested with approximately 3000 germinable Striga seeds, and the density of Striga that emerged, Striga damage on the host plant, plant height, stalk lodging, and grain yield were measured. …”
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Biological control of the cassava mealybug, Phenacoccus manihoti (Hom., Pseudococcidae) by Epidinocarsis lopezi (Hym., Encyrtidae) in West Africa, as influenced by climate and soil por Neuenschwander, Peter, Hammond, W., Ajuonu, O., Gado, A., Echendu, N., Bokonon-Ganta, A.H., Allomasso, R., Okon, I.

“…Population data concerning the cassava mealybug (CM) Phenacoccus manihoti Matile-Ferrero, the introduced parasitoid Epidinocarsis lopezi (De Santis), and indigenous antagonists were collected, together with ecological and plant growth variables, during a survey of 414 fields covering all ecological zones of Nigeria and Benin, for evaluation in multiple regression analyses. …”
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Effect of the bs 1 gene in plantainbanana hybrids on response to black sigatoka por Craenen, K., Ortíz, R.

“…Euploid hybrids with a known genotype for the bs1 locus were derived from triploid-diploid crosses of two French plantains and a diploid wild banana, and were assessed for their host response to black sigatoka in plant and ratoon crops in the humid forest zone of Nigeria. Host response was determined at flowering by recording the number of standing leaves, the youngest leaf with symptoms, the youngest leaf spotted, the total leaf area attacked by black sigatoka, and an index of the leaves spotted. …”
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Insect and disease resistance from tropical maize for use in temperate zone hybrids por Kim, S.K., Brewbaker, J.L., Hallauer, A.

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Recent advances in the development of sources of resistance to pink stalk borer and African sugarcane borer por Bosque Pérez, N.A., Kling, J.G., Odubiyi, S.I.

“…TZBR Eldana 3 was developed from elite, adapted populations and has performed well in multilocational yield trials in Nigeria and Cote d' Ivoire. TZBR Eldana 1 was derived from exotic germplasm and is less adapted to the lowland humid tropics. …”
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Gendered aspirations and occupations among rural youth, in agriculture and beyond: A cross-regional perspective por Elias, Marlène, Mudege, Netsayi N., López, Diana E., Najjar, Dina, Kandiwa, Vongai, Luis, Joyce S., Yila, Jummai Othniel, Tegbaru, Amare, Ibrahim, Gaya, Badstue, Lone B., Njuguna-Mungai, Esther, Bentaibi, Abderahim

“…Based on 25 case studies from the global comparative study ‘GENNOVATE: Enabling gender equality in agricultural and environmental innovation’, this paper explores rural young women’s and men’s occupational aspirations and trajectories in India, Mali, Malawi, Morocco, Mexico, Nigeria, and the Philippines. We draw upon qualitative data from 50 sex-segregated focus groups with the youth to show that across the study’s regional contexts, young rural women and men predominantly aspire for formal blue and white-collar jobs. …”
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