Search Results - "West Africa"

Aphids and their natural enemies in vegetable agroecosystems in Benin by Sæthre, May-Guri, Godonou, I., Hofsvang, T., Tepa-Yotto, Ghislain T., James, B.

“…These are the first records of L. testaceipes, S. africanus and A. spiraecola from West Africa. These findings provide baseline knowledge on the aphid fauna of Benin and contribute information for use in the development of sustainable vegetable pest management strategies in the country.…”
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Planting date and cultivar effects on grain yield in dryland corn production by Kamara, A.Y., Ekeleme, F., Chikoye, David, Omoigui, L.O.

“…Corn (Zea mays L.) production is gradually spreading into the Sudan savanna zone of West Africa where production is limited by erratic and inadequate rainfall. …”
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Performance of tropical early maturing maize cultivars in multiple stress environments by Badu-Apraku, Baffour, Menkir, A., Ajala, S., Akinwale, R., Oyekunle, M., Obeng-Antwi, K.

“…Maize (Zea mays L.) production in west Africa (WA) is constrained by drought, Striga hermonthica infestation and low soil nitrogen (N). …”
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A participatory approach to increasing productivity of maize through Striga hermonthica control in Northeast Nigeria by Kamara, A.Y., Ellis-Jones, J., Amaza, P., Omoigui, L.O., Helsen, J., Dugje, I.Y., Kamai, N., Menkir, A., White, R.W.

“…Great potential exists to scale out the results to similar areas of Guinea and Sudan savannas in the West Africa region.…”
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Banana Xanthomonas wilt in the DR Congo: impact, spread and management by Ndungo, V., Fiaboe, K.K.M., Mwangi, M.

“…Recent surveys show that the disease is spreading westwards, with increased risk of further spread through the Congo basin to key Musa producing regions in central and west Africa. Some of the factors that could slow down the westward spread of BXW include sparse human populations in the forest zone, unfavorably hot ecological conditions in the forest, and higher plantain densities in western DRC.…”
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Estimation of medium-term soil redistribution rates in Ibadan, Nigeria, by using the 137 Cs technique by Junge, Birte, Dercon, Gerd, Abaidoo, Robert C., Chikoye, David, Stahr, Karl

“…Soil erosion is a widespread and serious problem in Nigeria, West Africa. The 137 Cs technique is an alternative to field plots for generating data on medium-term soil redistri bution. …”
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Farmers perceptions of the speargrass (Imperata cylindrica) problem and its control in the lowland subhumid savannah of Nigeria by Chikoye, David, Ellis-Jones, J., Tarawali, G., Kormawa, P.M., Nielsen, O., Ibana, S., Avav, T.

“…Speargrassseverely constraints crop production in the sub-humid lowlands of West Africa. Researchers have identified and demonstrated effectivemanagement techniques but the adoption rate among farmers is still low. …”
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Participatory onfarm evaluation of the performance of droughttolerant maize varieties in the Guinea Savannas of Nigeria by Kamara, A., Kureh, I., Menkir, A., Kartung, P., Tarfa, B., Amaza, P.

“…Efforts are being made at IITA to develop or identify drought-tolerant maize varieties that are adapted to the Guinea savannas of West Africa. This study evaluated three maize varieties that have been identified either to tolerate or escape drought. …”
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Perceived effects of transhumant practices on natural resource management in southern Mali by Umutoni, Clarisse, Ayantunde, Augustine A.

“…Recurring forage and water scarcity in the Sahelian zone of West Africa, especially in the dry season, has led to increased livestock movement into Sudano-Sahelian and Sudano-Guinean zones in the region. …”
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Effect of nicosulfuron dosages and timing on the post emergence control of cogongrass (Imperata cylindrica) in corn (Zea mays) by Fontem Lum, A., Chikoye, David, Adesiyan, S.

“…Cogongrass is an aggressive perennial weed, which causes severe yield losses in major crops of the moist savanna of West Africa. Field studies were conducted from 2000 to 2002 at Alabata and Ilorin, Nigeria, to evaluate the influence of dosage and time of nicosulfuron application on the control of cogongrass and corn grain yield. …”
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Indigenous African soil enrichment as a climate‐smart sustainable agriculture alternative by Solomon, Dawit, Lehmann, Johannes, Fraser, James A, Leach, Melissa, Amanor, Kojo, Frausin, Victoria, Kristiansen, Søren M, Millimouno, Dominique, Fairhead, James

“…We describe for the first time a current indigenous soil management system in West Africa, in which targeted waste deposition transforms highly weathered, nutrient‐ and carbon‐poor tropical soils into enduringly fertile, carbon‐rich black soils, hereafter “African Dark Earths” (AfDE). …”
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Benefits and potential use of Arbuscular mycorrhizal fungi in banana and plantain systems in Africa by Jefwa, J., Coyne, Danny L., Gaidashova, S.V., Elsen, A., Asten, Piet J.A. van, Vanlauwe, Bernard

“…Greenhouse studies complement field studies for comparison at the different levels. In West Africa, studies have been conducted to assess the AMF associations and yield impact following inoculation. …”
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Response of speargrass (Imperata cylindrica) to cover crops integrated with handweeding and chemical control in maize and cassava by Chikoye, David, Manyong, Victor M., Carsky, R.J., Ekeleme, F., Gbehounou, G., Ahanchédé, A.

“…Studies were conducted in the savannah of West Africa from 1997 to 1999 to evaluate crop yield, speargrass control, and net benefit from the use of cover crops integrated with handweeding and chemical control in maize and cassava. …”
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Global changes, livestock and vulnerability: the social construction of markets as an adaptive strategy by Gautier, D., Locatelli, Bruno, Corniaux, C., Alary, Véronique

“…However, few studies have examined the role of markets in the adaptive strategies of livestock producers in West Africa, the changes in strategies for capturing market opportunities and the social interactions that lead to changes in market access and functioning. …”
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Natural Resource Management Schemes as Entry Points for Integrated Landscape Approaches: Evidence from Ghana and Burkina Faso by Foli, S., Ros-Tonen, M.A.F., Reed, J.D., Sunderland, Terry C.H.

“…This paper assesses the entry point potential for three established natural resource management schemes in West Africa that target landscape degradation with involvement of local communities: the Chantier d'Aménagement Forestier scheme encompassing forest management sites across Burkina Faso and the Modified Taungya System and community wildlife resource management initiatives in Ghana. …”
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Effect of insect damage to maize ears, with special reference to Mussidia nigrivenella (Lepidoptera; Pyralidae), on Aspergillus flavus (Deuteromycetes; Monoliales) infection and al... by Setamou, M., Cardwell, K., Schulthess, F., Hell, K.

“…Maize infection by Aspergillus flavus Link and subsequent aflatoxin contamination as affected by insect damage to maize ears before harvest was studied with surveys in farmers' fields and in a field trial in the Republic of Benin, West Africa. The most important pest species was the lepidopteran earborer Mussidia nigrivenella Ragonot. …”
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Seasonal cycles and persistence in an acarine predator-prey system on cassava in Africa by Hanna, R., Onzo, A., Lingeman, R., Yaninek, John S., Sabelis, M.W.

“…We applied time series analysis and a mechanistic predator-prey model to long-term data of monthly population counts of the herbivorous pest mite Mononychellus tanajoa and its introduced phytoseiid predator Typhlodromalus aripo from a cassava field in Benin, West Africa. In this approach, we determined the extent to which the main features of the observed predator-prey fluctuations in cassava fields can be explained from biotic traits inherent to the biology of predator and prey, and the extent of the significance of abiotic factors in determining population levels. …”
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The feasibility of classical biological control of two major cowpea insect pests by Tamo, Manuele, Bottenberg, H., Arodokoun, D., Adeoti, R.

“…In the savannas of West Africa, cultivated and wild host plants are always available to sustain the feeding and reproduction of the pest throughout the year, while the locally present natural enemies are unable to control its population. …”
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Mucuna fallow diffusion in southern Benin by Manyong, Victor M., Houndekon, V.A., Sanginga, P., Vissoh, Pierre V., Honlonkou, A.N.

“…Other windows of opportunity for Mucuna fallow may exist and need to be identified to achieve greater adoption and impact in the intensified systems of West Africa.…”
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Seasonal fluctuations of noctuid stemborer egg parasitism in southern Benin with special reference to Sesamia calamistis Hampson (Lepidoptera:Noctuidae) and Telenomus spp (Hymenopt... by Schulthess, F., Chabi-Olaye, A., Goergen, Georg E.

“…Although T. busseolae is ubiquitous in Africa, T. isis was only reported from West Africa, including Cameroon. It is recommended that the geographic range of T. isis should be expanded and include East and Southern Africa, where another host, Busseola fusca , is the most important noctuid stemborer pest on cereals.…”
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