Resultados de búsqueda - "Nigeria"

First report of rust caused by Phakopsora pachyrhizi on soybean in Democratic Republic of Congo por Ojiambo, P., Bandyopadhyay, Ranajit, Twizeyimana, M., Lema, A., Frederick, R.D., Pedley, K.F., Stone, C.L., Hartman, G.

“…Nigeria (1) and Uganda (3) are the closest countries to the Democratic Republic of Congo (DRC) where soybean rust caused by Phakopsora pachyrhizi has been reported. …”
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Relationship between natural occurrence of banana streak badnavirus and symptom expression, relative concentration of viral antigen, and yield characteristics of some micropropagat... por Dahal, G., Ortíz, R., Tenkouano, A., Hughes, J., Thottappilly, G., Vuylsteke, D.R., Lockhart, B.E.L.

“…Micropropagated plants of 36 Musa genotypes with diverse genetic backgrounds, including 14 tetraploid plantain (TMPx) and banana (TMBx) hybrids, were evaluated for their response to banana streak badnavirus (BSV) infection under three environments from 1995 to 1997 in Nigeria. The characteristics evaluated were the natural incidence of BSV based on symptoms and virus indexing, relative concentration of BSV antigens in leaf tissues determined by ELISA, and some growth and yield descriptors. …”
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Genotype X environment interaction, stability and agronomic performance of carotenoid-rich cassava clones por Ssemakula, G.N., Dixon, A.

“…Genotypes were evaluated over two years (2004/2005, 2005/2006) at five locations in Nigeria. All clones expressed mild CBB and CAD symptoms; eleven clones did not have CMD symptoms, while CGM was the most severe biotic stress. …”
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An improved cover cropfallow system for sustainable management of low activity clay soils of the tropics por Tian, G., Kolawole, G.O., Salako, F.K., Kang, B.

“…The potential of planted leguminous cover crop fallow as an alternative to the natural regrowth fallow for sustaining the productivity of low activity clay (LAC) soils in the tropics as the fallow period shortens was tested at Ibadan in the forest-savanna zone of southwestern Nigeria. The study, initiated in 1990, compared an improved system (cover crop-fallow) and a traditional system (natural fallow), with the aim of developing an improved cover crop-fallow system for sustainable management of LAC soils of the tropics. …”
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Longterm soil organic carbon dynamics in a subhumid tropical climate: 13C data in mixed C3/C4 cropping and modeling with ROTHC por Diels, J., Vanlauwe, Bernard, Meersch, M.K. van der, Sanginga, N., Merckx, Roel

“…We observed SOC content changes in a 16-year continuously cropped agroforestry experiment in Ibadan, south-western Nigeria. SOC levels declined in all treatments. The decline was most pronounced in the no-tree control treatments with continuous maize and cowpea cropping, where SOC levels dropped from the initial 15.4 to 7.3–8.0 Mg C ha−1 in the 0–12 cm topsoil in 16 years. …”
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Cassava leaf harvesting as vegetables: a cause of vulnerability of cassava plants to cassava mosaic disease and eventual yield reduction por Ariyo, O.A., Dixon, Alfred G.O., Atiri, G.I.

“…The consequence of harvesting young leaves of cassava as vegetable on the vulnerability of the crop to cassava mosaic disease (CMD) and on storage root yield was investigated using 30 cassava genotypes planted in IITA fields located in the humid forest (Port Harcourt : Onne), forest-savannah transition (Ibadan), southern guinea savannah (Mokwa) and northern guinea savannah (Zaria) agroecologies in Nigeria. Tender apical leaves and shoots of the cassava genotypes were removed from forty plants per cassava genotype with the same number of plants considered as control. …”
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Future of plant virus disease research in subSaharan African agriculture por Hughes, J., Naidu , R., Shoyinka, S.A.

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Replenishment of C, N, and P in a degraded alfisol under humid tropical conditions; effect of fallow species and litter polyphenols por Tian, G., Salako, F., Ishida, F.

“…Therefore, a study was conducted at Ibadan, southwestern Nigeria (humid tropics), to look into these relationships using fallow species with varying chemical compositions. …”
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IPMomics: from genomics to extension for integrated pest management of cowpea: Proceedings of the 5th World Cowpea Research Conference, held at Palm Beach Hotel, Saly, Senegal. 27... por Agunbiade, T.A., Steele, L., Coates, B., Gassmann, A., Margam, V., Ba, M., Dabiré, C., Baoua, I., Bello-Bravo, Julia, Seufferheld, F., Sun, W., Tamò, Manuele, Pittendrigh, B.

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First report of Curvularia lunata associated with stem disease of cassava por Msikita, W., Yaninek, John S., Ahounou, M., Baimey, H., Fagbemissi, R.

“…During surveys covering 60 cassava (Manihot esculenta Crantz) fields, randomly selected (between latitude 4°55′N and 8°16′N) in south Ghana, and 27 fields in southeast (between 4°50′N and 7°56′N) Nigeria, 8-month-old or older stems of some cassava genotypes were found to be covered by grayish brown lesions, predominantly on lignified portions of stems. …”
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Discharge estimation and forecasting by MODIS and altimetry data in Niger-Benue River por Tarpanelli, A., Amarnath, Giriraj, Brocca, L., Massari, C., Moramarco, T.

“…In this study, we performed the forecast of river discharge by using MODIS and we compared it with the radar altimetry and in-situ data along the Niger-Benue River in Nigeria to develop an operational flood forecasting scheme that could help in rapid emergency response and decision making processes. …”
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Genetic analysis of host plant resistance to the cassava mosaic disease por Lokko, Y.R.N.N.

“…The F-i progenies of 54 cassava crosses and their parents (clone 58308, six improved clones and 15 African landraces) were evaluated in two genetic experiments in three environments in Nigeria. Genetic analysis revealed that additive gene effect was more important in the genetics of resistance to CMD among the landraces, while both additive and non-additive gene effecsts were important for clone 58308. …”
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Bioprospecting of microbial strains for biofuel production: metabolic engineering, applications, and challenges por Adegboye, Mobolaji Felicia, Ojuederie, Omena Bernard, Talia, Paola Mónica, Babalola, Olubukola Oluranti

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Assessing rice production sustainability performance indicators and their gaps in twelve sub-Saharan African countries por Arouna, A., Devkota, Krishna Prasad, Yergo, W.G., Saito, Kazuki, Frimpong, B.N., Adegbola, Patrice Ygue, Depieu, M.E., MalaaKenyi, D., Ibro, G., Fall, A.A., Usman, S.

“…Data were collected between 2013–2014 from 2907 farmers from two rice production systems (irrigated and rainfed lowlands) across five agroecological zones (arid, semiarid, humid, subhumid and highlands) in 12 countries (Benin, Cameroon, Cote d’Ivoire, Ghana, Madagascar, Mali, Niger, Nigeria, Senegal, Sierra Leone, Tanzania and Togo). …”
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Antioxidant and starch-hydrolyzing enzymes inhibitory properties of Striga-resistant yellow-orange maize hybrids por Elemosho, A.O., Irondi, E.A., Alamu, Emmanuel Oladeji, Ajani, E.O., Menkir, A., Maziya-Dixon, Busie

“…The maize hybrids were grown at the International Institute of Tropical Agriculture (IITA), Nigeria. The bioactive compounds (total phenolics, tannins, flavonoids, and phytate) levels, antioxidant (DPPH• and ABTS•+ scavenging capacity and reducing power) and starch-hydrolyzing enzymes (α-amylase and α-glucosidase) inhibitory activities of the maize hybrids were determined by spectrophotometry. …”
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A decision makers’ guide to equitable sustainable agricultural intensification por Grabowski, Philip, Fischer, Gundula, Djenontin, I.N.S., Zulu, L., Kamoto, J., Kampanje-Phiri, J., Egyir, I., Darkwah, A.

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Assessment of the impact of crop management strategies on the yield of early-maturing maize varieties in the drylands of Niger Republic: Application of the DSSAT-CERES-Maize model por Kamara, A., Garba, M., Tofa, A., Mohamed, A.M.L., Souley, A.M., Abdoulaye, T., Kapran, B.I.

“…The model was calibrated with datasets collected from field trials conducted under optimal conditions (supplementary irrigation and full nutrient supply) at three locations in northern Nigeria. The model was validated with independent data set obtained from field trials conducted in 2020 and 2021 at 4 locations in the Republic of Niger under rainfed conditions. …”
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Anticipatory action in communities hosting refugees and internally displaced persons: an assessment of current approaches por Schindler, Alexandra, Singh, Radhika, Adam-Bradford, A., Laauwen, M., Ruckstuhl, Sandra

“…Next, the paper analyzes the types of water- and climate-related vulnerabilities in host communities, and the anticipatory action approaches that organizations are undertaking in those communities, using case studies from Bangladesh, Nigeria and Sahel. The data from these case studies show how existing host community vulnerabilities and food, land and water-related stresses can compound disasters for hosts and forcibly displaced people when impacted by extreme weather events, conflict, disease outbreaks, and food insecurity. …”
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Reaching the unheard: multistakeholder dialogues towards resilient landscape management planning in West Africa por Atampugre, Gerald, Oke, Adebayo, Igbadun, H. E., Tilahun, Seifu A., Cofie, Olufunke O., Mabhaudhi, Tafadzwanashe

“…In the context of the CGIAR Initiative on Transforming AgriFood Systems West and Central Africa (TAFS-WCA), several MSDs were organized in targeted landscapes in Ghana and Nigeria to co-develop inclusive landscape management plans (ILMPs). …”
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Climate change impact and adaptation of rainfed cereal crops in sub-Saharan Africa por Alimagham, S., van Loon, M.P., Ramírez Villegas, Julián Armando, Adjei- Nsiah, S., Baijukya, F., Bala, A., Chikowo, R., Silva, J.V., Soule, A.M., Taulya, G., Tenorio, F.A., Tesfaye, F.A., van Ittersum, M.

“…This study aimed to assess (i) the potential climate change impact on four key rainfed cereals (maize, millet, sorghum and wheat) in ten SSA countries namely Burkina Faso, Ghana, Mali, Niger, Nigeria, Ethiopia, Kenya, Tanzania, Uganda, and Zambia using local data and national expertise, and (ii) the potential of cultivar adaptation to climate change for the four crops. …”
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