IITA Bibliography System: Recent submissions

Now showing items 841-860 of 7933

    • Developing the role of legumes in west Africa under climate change 

      Paliwal, R.; Abberton, M.; Faloye, B.; Olaniyi, O. (2020-08)
      West Africa is faced with significant challenges from climate change, including parts of the region becoming hotter with more variable rainfall. The Sahelian region in particular is already subject to severe droughts. To address this better adapted crop varieties (such as for cowpea) are clearly a central element, a complementary one is a greater use of resilient alternative crops especially underutilized legumes particularly Bambara groundnut, African yam bean, winged bean and Kersting’s groundnut. ...

    • Sustainable food production in Africa: turning African Countries into development catalysts, food reservoirs and exporters 

      Oyekanmi, E.; Coyne, D.; Fawole, B.; Adeoye, G. (2020)
      The myriad of challenges facing Africa, were considered in this paper, which include the nagging triplet problems of poverty, hunger and diseases. Africa is prominent in the world hunger map of Food and Agriculture Organization. Therefore, this paper identified poorly tapped natural and human resources, uneconomically viable policies and poor management as some of the banes of Africa’ setback. This work proffered proactive solutions to freeing Africa from the triplet perennial problems of poverty, ...

    • Differentiated Neogene bauxitization of volcanic rocks (western Cameroon): morpho-geological constraints on chemical erosion 

      Momo, M.N.; Beauvais, A.; Tematio, P.; Yemefack, M. (2020-11)
      Lateritic weathering of Miocene volcanic rocks from western Cameroon highlands formed duricrusted bauxitic profiles. Two weathering profiles on ca. 14 Ma basalt and ca. 16 Ma trachyte were studied using geochemical mass balance functions. Less mobile elements Ti and Zr were used as references to quantify volumetric change (strain, ε), element transfer rate (τ) and geochemical mass transfers during the bauxitization process of basalt and trachyte. Conversion of parent rocks to kaolinite and goethite ...

    • Maize–soybean intercropping effect on yield productivity, weed control and diversity in northern Ghana 

      Berdjour, A.; Dugje, I.Y.; Dzomeku, I.K.; Rahman, N.A. (2020-06-29)
      The cereal–legume cropping system is a common practice across the tropical world. However, there are limited quantitative data on the effect of cereal–legume intercropping on weed species diversity. A study was conducted in the Guinea savanna zone of Ghana to evaluate the effect of maize–soybean intercropping on yield productivity and weed species control. The treatments used include three maize maturity types (extra‐early: Abontem, early: Sammaz 27 and medium: Obatanpa) intercropped with soybean ...

    • Improving root characterisation for genomic prediction in cassava 

      Yonis, B.O.; del Carpio, D.P.; Wolfe, M.; Jannink, J.L.; Kulakow, P.; Rabbi, I. (2020-05-14)
      Cassava is cultivated due to its drought tolerance and high carbohydrate-containing storage roots. The lack of uniformity and irregular shape of storage roots poses constraints on harvesting and post-harvest processing. Here, we phenotyped the Genetic gain and offspring (C1) populations from the International Institute of Tropical Agriculture (IITA) breeding program using image analysis of storage root photographs taken in the field. In the genome-wide association analysis (GWAS), we detected for ...

    • Beyond survival opportunities: enhancing youth livelihoods within the rural space through informed policies in Nigeria 

      Olaosebikan, O.; Teeken, B.; Bello, A.A.; Okoye, B.; Crossouard, B.; Sumberg, J.E.; Madu, T. (2021)

    • Impacts of CGIAR maize improvement in sub-Saharan Africa 1995-2015 

      Krishna, V.V.; Lantican, M.A.; Prasanna, B.M.; Pixley, K.; Abdoulaye, T.; Menkir, A.; Banziger, M.; Erenstein, O. (International Maize and Wheat Improvement Center, 2021-03)

    • Review of solar dryers for agricultural products in Asia and Africa: an innovation landscape approach 

      Udomkun, P.; Romuli, S.; Schock, S.; Mahayothee, B.; Sartas, M.; Wossen, T.; Njukwe, E.; Vanlauwe, B.; Müller, J. (2020-08-15)
      Solar drying is one of the most efficient and cost-effective, renewable, and sustainable technologies to conserve agricultural products in Asian and sub-Saharan African (SSA) countries. This review paper presents the different types of solar dryers that are widely used in Africa and Asia. In addition, the pre-eminent effects of their use on product quality, as well as their economic, environmental, and social impacts, are highlighted. Since financial, external, and structural factors play a key ...

    • Identification of sources of resistance in cowpea mini core accessions to Aphis craccivora Koch (Homoptera: Aphididae) and their biochemical characterization 

      Togola, A.; Boukar, O.; Servent, A.; Chamarthi, S.; Tamo, M.; Fatokun, C. (2020-05-17)
      Cowpea (Vigna unguiculata (L. Walp) is an important grain legume for human and livestock nutrition, especially in sub-Saharan Africa. Aphid, Aphis craccivora Koch (Homoptera: Aphididae), is one of the most widespread and destructive insect pests of cowpea and host-plant resistance is an effective approach to minimize the pest damage at seedling stage. This study was aimed at identifying resistant sources to A. craccivora within the cowpea mini core collection, a set of accessions from the largest ...

    • Global priorities of environmental issues to combat food insecurity and biodiversity loss 

      Scherer, L.; Svenning, J.C.; Huang, J.; Seymour, C.; Sandel, B.; Mueller, N.; Kummu, M.; Bekunda, M.; Bruelheide, H.; Hochman, Z.; Siebert, S.; Rueda, O.; van Bodegom, P.M. (2020-08-15)
      Various environmental challenges are rapidly threatening ecosystems and societies globally. Major interventions and a strategic approach are required to minimize harm and to avoid reaching catastrophic tipping points. Setting evidence-based priorities aids maximizing the impact of the limited resources available for environmental interventions. Focusing on protecting both food security and biodiversity, international experts prioritized major environmental challenges for intervention based on three ...

    • Chemical, functional and pasting properties of starches and flours from new yam compared to local varieties 

      Effah-Manu, L.; Wireko-Manu, F.D.; Agbenorhevi, J.K.; Maziya-Dixon, B.; Oduro, I. (2022)
      The potential uses of starches and flours depend on their physicochemical and functional properties. The chemical composition, functional and pasting properties of starch and flours obtained from some newly developed yam varieties from the Crops Research Institute (CRI), Ghana were evaluated, and compared with the existing local varieties. The results showed that the physicochemical and functional properties varied among the varieties studied. The CRI varieties were grouped in a principal component ...

    • Antiviral and cytotoxic activity of different plant parts of banana (Musa spp.) 

      Panda, S.K.; Castro, A.H.F.; Jouneghani, R.S.; Leyssen, P.,; Neyts, J.; Swennen, R.; Luyten, W. (2020-05-15)
      Chikungunya and yellow fever virus cause vector-borne viral diseases in humans. There is currently no specific antiviral drug for either of these diseases. Banana plants are used in traditional medicine for treating viral diseases such as measles and chickenpox. Therefore, we tested selected banana cultivars for their antiviral but also cytotoxic properties. Different parts such as leaf, pseudostem and corm, collected separately and extracted with four different solvents (hexane, acetone, ethanol, ...

    • Characterization of some fungal pathogens causing anthracnose disease on yam in Cross River State, Nigeria 

      Okon, N.I.; Markson, A.A.A.; Okon, E.I.; Ita, E.E.; Uyoh, E.A.; Ene-Obong, E.O.E.; Ntui, V.O. (2022)
      Yam anthracnose is one of the most serious fungal diseases affecting white and water yam production. Screening of available landraces for new sources of durable resistance to the pathogen is a continuous process. In the present study, the pathogens causing anthracnose in Dioscorea alata and Dioscorea rotundata farms in Cross River State yam belt region were characterized. Diseased yam leaves with anthracnose symptoms collected from the farms were used in the isolation, purification and, identification ...

    • Effects of traditional processing techniques on the nutritional and microbiological quality of four edible insect species used for food and feed in east Africa 

      Nyangena, D.N.; Mutungi, C.; Imathiu, S.; Kinyuru, J.; Affognon, H.; Ekesi, S.; Nakimbugwe, D.; Fiaboe, K.K. (2020-05-04)
      Edible insects are increasingly being considered as food and feed ingredients because of their rich nutrient content. Already, edible insect farming has taken-off in Africa, but quality and safety concerns call for simple, actionable hazard control mechanisms. We examined the effects of traditional processing techniques—boiling, toasting, solar-drying, oven-drying, boiling + oven-drying, boiling + solar-drying, toasting + oven-drying, toasting + solar-drying—on the proximate composition and ...

    • Maize production under combined conservation agriculture and integrated soil fertility management in the sub-humid and semi-arid regions of Kenya 

      Mutuku, E.A.; Roobroeck, D.; Vanlauwe, B.; Boeckx, P.; Cornelis, W.M. (2020-09-01)
      Crop production in Sub-Saharan Africa (SSA) is constrained by rainfall variability and declining soil fertility. This has over time led to a decrease in crop yield, among them also maize. This decrease is also experienced in the sub-humid and semi-arid locations of Kenya. Among the commonly used soil and water management practices in SSA are Conservation Agriculture (CA) and integrated soil fertility management (ISFM). Crop response to these management practices is influenced by the existence of ...

    • Spatial-temporal trends of rainfall, maximum and minimum temperatures over west Africa 

      Muthoni, F. (2020-05-25)
      This article investigates the magnitude and significance of spatial-temporal trends of 37 years' time series of the gridded data for rainfall, maximum (Tmax) and minimum (Tmin) temperature for West Africa. A modified Mann-Kendall test and Theil-Sen's slope estimator were utilized to test the significance and the magnitude of trends, respectively. The magnitude of significant trends for three variables between six agroecological zones (AEZs) was compared. Gridded climate data represented gauge data ...

    • Motivational factors influencing farming practices in northern Ghana 

      Mellon-Bedi, S.; Descheemaeker, K.; Hundie-Kotu, B.; Frimpong, S.; Groot, J.C.J. (2020-12)
      Socio-economic factors that influence the adoption of management practices and technologies by farmers have received wide attention in the adoption literature, but the effects of socio-psychological farmer features such as perceptions and motivations have been analysed to a lesser extent. Using farm household survey data from three regions in northern Ghana, this study explores farmers’ motivations and perceived adoption impediments for three sustainable intensification practices (SIPs): improved ...

    • Diversified approaches to evaluate wide genetic resources of cowpea for enhancing new variety development for west Africa and its social implementation by cowpea research program of IITA 

      Ishikawa, H.; Matsumoto, R. (2021)
      Cowpea is a staple food crop and a primary source of protein for millions of people in developing countries. Although the crop is primarily cultivated for its mature grains, immature green pods and young green leaves can be consumed as a vegetable. The International Institute of Tropical Agriculture (IITA) was established in 1967; the organisation’s extensive research has developed many improved varieties of most staple food crops to benefit people across Africa. For example, more than 100 IITA-bred ...

    • The economics of post-harvest loss and loss-preventing technologies in developing countries 

      Ricker-Gilbert, J.; Omotilewa, O.J.; Kadjo, D. (2022)
      This article reviews the recent literature that has evaluated the effectiveness of postharvest loss (PHL)-reducing technologies for grains among smallholder farmers and small-scale traders in sub-Saharan Africa. We also develop a conceptual framework for identifying and quantifying different types of PHL that include physical quantity losses along with quality losses that are both observable (e.g., discoloration, insect damage, mold growth, and odor) and unobservable (e.g., aflatoxin contamination, ...

    • Participatory action research, social networks, and gender influence soil fertility management in Tanzania 

      Mponela, P.; Manda, J.; Kinyua, M.; Kihara, J. (2022)
      Transformation of knowledge systems and fostering learning among smallholder farmers such as through participatory action research (PAR) is key to agricultural growth in rural sub-Saharan Africa. We investigate how PAR influences uptake/use of integrated soil fertility management (ISFM) while accounting for gendered, bonding and bridging social capital. Stratified by engagement in a mother-baby PAR and by resource endowments, 607 smallholder farmers were sampled from northern Tanzania. Binary ...