Search Results - "West Africa"

Institutional aspects of sanitary and phytosanitary issues in ECOWAS trade by Hughes, J., Bandyopadhyay, Ranajit, Makinde, K., Olembo, S.

“…There is generally a low level of awareness of quality standards among produce exporters in West Africa. SPS focal points are not established in all countries, which makes it difficult for exporters to check on standards and requirements. …”
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Promoting integrated management practices for speargrass (Imperata cylindrica (L) Raeusch.) in soybean, cassava and yam in Nigeria by Chikoye, David, Ellis-Jones, J., Avav, T., Kormawa, P.M., Udensi, U.E., Tarawali, G., Nielsen, O.K.

“…Speargrass is a serious weed in many farming systems of West Africa. Participatory research and extension approaches were used to promote farmer testing of alternative speargrass management options in yam, cassava and soybean in Nigeria. …”
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Ameliorating acid infertile rice soil with organic residue from nitrogen fixing trees by Baggie, I., Zapata, F., Sanginga, N., Danso, S.

“…Residues from two nitrogen fixing trees, Albizia zygia and Gliricidia sepium and one non nitrogen fixing tree Samania dinklagei and their combination with 50% of rice husk, were evaluated for their effect on growth and yield of rice (Oryza sativa) varieties (Rok 10 and Rok 23) grown in an Oxisol collected from a rice paddy in Inland valley swamps of Sierra Leone, West Africa. Ground and dried residues were mixed with soil and labelled with N15 ammonium sulfate (9.855% atom excess) at a rate of 10 mg N kg-1 soil. …”
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Inheritance of resistance to yam mosaic virus, genus Potyvirus, in white yam (Dioscorea rotundata) by Mignouna, H., Njukeng, P., Abang, Mathew M., Asiedu, Robert

“…Yam mosaic virus (YMV) causes the most-widespread and economically important viral disease affecting white yam (Dioscorea rotundata) in West Africa. The genetic basis of resistance in white yam to a Nigerian isolate of YMV was investigated in three tetraploid D. rotundata genotypes: TDr 93–1, TDr 93–2 and TDr 89/01444. …”
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Methodological guide: Community participatory inventory and prioritization of climate-smart crop-livestock agroforestry technologies / practices by Bayala, Jules, Ayantunde, Augustine A., Somda, Jacques, Ky-Dembélé, Catherine, Bationo, B. André, Sanogo, Diaminatou, Tougiani, Abasse, Zougmoré, Robert B.

“…The guide was developed within the framework of a project “Building resilient agro-sylvo-pastoral systems in West Africa through participatory action research” (BRAS-PAR)” which is one ofthe flagship 2 projects funded by the CGIAR Research Program on Climate Change Agriculture and Food Security (CCAFS). …”
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Envisioning the future and learning from the past: adapting to a changing environment in northern Mali by Brockhaus, Maria, Djoudi, H., Locatelli, Bruno

“…In West Africa, rural livelihoods depending on natural resources develop coping and adapting strategies to face climate variability or change and economic or political changes. …”
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Globalisations in a nutshell: historical perspectives on the changing governance of the shea commodity chain in northern Ghana by Wardell, D.A., Fold, N.

“…Pre-colonial patterns of trade in West Africa included exchanges of shea in periodic local and regional markets. …”
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Behavioural fever in the Senegalese grasshopper, Oedaleus senegalensis, and its implications for biological control using pathogens by Blanford, S., Thomas, M.B., Langewald, J.

“…Thermoregulatory behaviour of the Senegalese grasshopper, Oedaleus senegalensis (Krauss), was investigated in the field following a spray application of an oil-based formulation of Metarhizium flavoviride Gams and Rozsypal in Niger, West Africa. 2. Measurements of environmental temperature, wind speed and solar radiation were made in conjunction with measurements of internal body temperatures of grasshoppers from a control (unsprayed) and treated plot using microthermocouples and hand-held thermometers. …”
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Effect of drought and plant density on radiation interception, radiation use efficiency and patitioning of dry matter to seeds in cowpea by Craufurd, Peter Q., Wheeler, T.R.

“…The effects of drought and plant density on fractional interception (f), radiation-use efficiency (RUE) and dry matter accumulation and partitioning to seeds in cowpea (Vigna unguiculata) need to be quantified in order to calibrate cowpea simulation models for West Africa. Accordingly, a short duration cultivar of cowpea, IT84S-2246-4, was grown at a range of plant densities in well-watered and drought conditions in 1990–91 at two contrasting locations in Nigeria, Ibadan (7°N) and Kano (12°N). …”
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Genotypic variations in physiological deterioration of cassava (Manihot esculenta Crantz) storage roots under inland valley conditions by Ekanayake, I.J., Lyasse, O.

“…Cassava (Manihot esculenta Crantz) is an important starchy food crop in the inland valley ecosystem areas in West Africa where harvesting and marketing infrastructure is not optimal and postharvest losses are high. …”
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Amelioration de la gestion des sols par lintroduction de legumineuses dans les systemes cerealiers des savannes africaines by Carsky, R.J., Douthwaite, Boru, Manyong, Victor M., Sanginga, N., Schulz, S., Vanlauwe, Bernard, Diels, J., Keatinge, J.D.H.

“…Lessons for appropriate soil management technology generation for the savannas and their application to the grain legume-cereal rotation system There are many legume-based techno logies capable of regenerating soi l ferti lity but few are being adopted by fa rmers in West Africa . At the Tn ternationa l Institute of Tro pica l Agriculture (TTTA) we found that alley cropping and cover cropping systems are biologica ll y sustainable but have low adoption by farmers in the medium term. …”
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First report of banana streak badnavirus in plantain landraces in southern Cameroon, Central Africa by Gauhl, F., Pasberg-Gauhl, C., Hughes, J.D.A.

“…Banana streak badnavirus (BSV) has been reported from Musa spp. in many parts of West Africa, including Benin, Côte d'Ivoire, Ghana, and Nigeria (1). …”
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Effect of use of savanna tree leaves as mulch materials on germination and growth of selected annual crop seedlings by Hayashi, Y., Carsky, R.J.

“…Leaves of indigenous and exotic tree species adapted to the climatic conditions of the northern Guinea savanna of West Africa were evaluated for use as a mulch material and screened for their effect on germination and early growth of two varieties each of soybean (Glycine max), cowpea (Vigna unguiculata), maize (Zea ways), sorghum (Sorghum bicolor) and millet (Pennisetum glaucum). …”
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Nurturing a network of policy analysts for enhanced agricultural development and food and nutrition security in Kenya by Karugia, Joseph T.

“…Co-hosted by Kenya and Ethiopia, it has regional or country offices and projects in East, South and Southeast Asia as well as Central, East, Southern and West Africa. The AgriFoSe2030 Program was developed by a consortium of scientists from the Swedish University of Agricultural Sciences (SLU), Lund University, Gothenburg University and Stockholm Environment Institute and hosted by the SLU Global (Agricultural Sciences for Global Development) platform. …”
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Screening for gemini- and potyviridae-related viruses infecting cassava in South America. by Jiménez Polo, Jenyfer, Zanini, Andrea, Fernández, Elizabeth, Martínez Garay, Carlos, Bolaños, Carmen A., Cuéllar, Wilmer Jose

“…Meanwhile, cassava-infecting potyviruses seem to be restricted to West-Africa. No isolates of these virus families, nor related diseases have yet been reported infecting cassava in the Americas. …”
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Spatial distribution of and sampling plans for Mussidia nigrivenella (Lepidoptera: Pyralidae) on cultivated and wild host plants in Benin by Sétamou, M., Schulthess, F., Poehling, H., Borgemeister, C.

“…The spatial distribution of Mussidia nigrivenella Ragonot was studied in maize fields and on four major wild host plants in the Republic of Benin, West Africa. Maize ears were sampled at harvest in 1994 and 1995, and fruits of the wild host plants were collected monthly from January 1996 to December 1997 during the fruiting periods of the respective host species. …”
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Influence of thrips prey species on the lifehistory and behaviour of Orius albidipennis (Reuter) (Heteroptera) by Fritzsche, M., Tamo, Manuele

“…The effects of two diets, i.e., cowpea leaves plus Megalurothrips sjostedti larvae versus cowpea leaves alone, on nymphal development and mortality of Orius albidipennis were studied under controlled laboratory conditions in Benin, West Africa. Nymphal development was longer when O. albidipennis was fed with cowpea leaves only, compared to the diet complemented with M. sjostedti larvae (17.6 days versus 14.8, respectively). …”
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Influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in Benin by Hell, K., Cardwell, K., Sétamou, M., Schulthess, F.

“…Insect species and damage levels were evaluated and related to aflatoxin content in maize sampled from farmers' stores in four agroecological zones over a two-year period in Benin, West-Africa. In 1993, no aflatoxin was detected in maize that was free of isect damage. …”
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Geographical patterns of diversity for morphological and agronomic traits in the groundnut germplasm collection by Upadhyaya, Hari D., Bramel-Cox, P.J., Ortíz, R., Singh, S.

“…Principal component analysis (PCA) using 38 traits and clustering on first seven PC scores delineated three regional clusters; consisting North America, Middle East, and East Asia in the first cluster, South America in the second cluster, and West Africa, Europe, Central Africa, South Asia, Oceania, Southern Africa, Eastern Africa, Southeast Asia, Central Asia, and Caribbean in the third cluster.…”
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Intermediate tree cover can maximize groundwater recharge in the seasonally dry tropics by Ilstedt, Ulrik, Bargués Tobella, A, Bazié, HR, Bayala, J, Verbeeten, E, Nyberg, G, Sanou, J, Benegas, Laura, Murdiyarso, D, Laundon, H

“…Our results, based on groundwater budgets calibrated with measurements of drainage and transpiration in a cultivated woodland in West Africa, demonstrate that groundwater recharge was maximised at intermediate tree densities. …”
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