IITA Bibliography System: Recent submissions

Now showing items 641-660 of 8125

    • Breeding for abiotic stress resistance in yam (Dioscorea Spp.) using biotechnology approaches: present practices and prospects 

      Agre, A.P.; Mondo, J.; Edemodu, A.; Matsumoto, R.; Asiedu, R.; Akoroda, M.O.; Bhattacharjee, R.; Gedil, M.; Adebola, P.O.; Asfaw, A. (Springer, 2022-11-01)
      Yam (Dioscorea spp.) is an important crop providing food, income and medicine in tropics and subtropics. Major yam species in West Africa such as D. alata and D. rotundata are subject to several biotic and abiotic stresses throughout the cropping cycle and post-harvest periods, resulting in substantial tuber yield and quality trait losses. Abiotic stresses (heat, drought, low soil fertility, salinity, waterlogging, etc.) are currently exacerbated by the climate change effects. Yet, limited efforts ...

    • Impact and adoption of drought tolerant maize varieties and interrelated agricultural technologies on rural households productivity and welfare 

      Oyetunde-Usman, Z. (University of Greeenwich, 2021)
      Over the years, climatic variations have persistently induced technological interventions in developing countries and were strategic in varietal development and modification of agronomical practices in developing countries. In addition, there are overwhelming records of impact on productivity and welfare of rural farm households. Despite these efforts, low adoption continues to be a huge problem and a clog to meeting sustainable agricultural development goals. This research contributes to the large ...

    • Adoption et perception des producteurs Nigeriens face aux changements climatiques et l'utilisation des varietes ameliorees 

      Issoufou, M.H. (Institut de Strategie D'evaluation et de Prospective, 2021)
      L’agriculture Nigérienne fait face à une faible production agricole car étant une agriculture pluviale à faible rendement, et l’élevage, un élevage extensif tributaire des ressources naturelles. IL est de plus en plus admis que le réchauffement planétaire actuel ne peut être évité (IPCC, 2007). Le recours à l’adoption des technologies agricoles améliorées s’est avéré indispensable pour une augmentation de la production agricole dans le but d’améliorer le bien-être des producteurs. Ainsi, dans notre ...

    • Direct planting versus transplanting of yam leaf-bud cuttings for seed production 

      Aighewi, B.; Maroya, N.; Aihebhoria, D.; Balogun, M.; Mignouna, D.; Asiedu, R. (IInternational Institute of Tropical Agriculture, 2022-11)

    • Mapping quantitative trait loci and predicting candidate genes for Striga resistance in maize using resistance donor line derived from Zea diploperennis 

      Badu-Apraku, B.; Adewale, S.; Agre, P.; Offornedo, Q.; Gedil, M. (2023-01-12)
      The parasitic weed, Striga is a major biological constraint to cereal production in sub-Saharan Africa (SSA) and threatens food and nutrition security. Two hundred and twenty-three (223) F2:3 mapping population involving individuals derived from TZdEI 352 x TZEI 916 were phenotyped for four Striga-adaptive traits and genotyped using the Diversity Arrays Technology (DArT) to determine the genomic regions responsible for Striga resistance in maize. After removing distorted SNP markers, a genetic ...

    • Influence of soil moisture stress on vegetative growth and root yield of some cassava genotypes for better selection strategy in screen house conditions and different agro-ecologies in Nigeria 

      Adetoro, N.A.; Mouritala, S. (IntechOpen, 2022-07-05)
      Cassava is a vital staple crop for many African populations particularly in Nigeria. This study was conducted to determine the effect of soil moisture on the performance of selected 12 cassava genotypes that were evaluated for yield and related traits under three percentages of field capacity (75% – control, 50%, and 25%) in the screen house and field conditions in three agro-ecologies (Ibadan-Derived Savanna, Mokwa-Southern Guinea Savanna, and Zaria-Northern Guinea Savanna) and randomized complete ...

    • Assessment of biochemical, cooking, sensory and textural properties of the boiled food product of white yam (D. rotundata) genotypes grown at different locations 

      Alamu, E.O.; Adesokan, M.; Awoyale, W.; Oyedele, H.A.; Fawole, S.; Amele, A.; Maziya-Dixon, B. (2022-12)
      Specific biochemical properties and textural attributes determine the final quality and acceptability of yam food products. This study assessed the flour and cooking qualities (boiled yam) of sixteen elite white yam genotypes (D. rotundata) grown in three locations. Fresh yam samples were cut into regular-shaped pieces and boiled using the standard procedure. Sub-samples were oven-dried at 65 °C for 72 h and milled to flour. The biochemical profiling for the yam flour showed, on average, 61.35 ± ...

    • Quantifying potential yield and yield gaps of soybean using CROPGRO-soybean model in the humid tropics of southwestern Ethiopia 

      Mekonnen, A.; Getnet, M.; Nebiyu, A.; Abebe, A.T. (2022-10-24)
      In the past, much of the emphasis on soybean research in Ethiopia has been on the development and testing of new varieties and classical agronomic trials with limited use of crop models that help in estimating the potential yield and yield gaps, and identifying the most important barriers of achieving optimal yield. CROPGRO-soybean model is an important tool for estimating the potential yield and yield gaps of soybean under various management and environmental conditions. The objectives of this ...

    • Species richness, density, activity, and composition of ground-dwelling ants in the humid forest zone of southern Cameroon: role of vegetation cover and abiotic factors 

      Fotso Kuate, A.; Hanna, R.; Nanga, S.N.; Tindo, M.; Doumtsop Fotio, A.R.P.; Nagel, P. (2022-12)
      The destruction of natural habitats is among the major factors responsible for the decrease in species diversity and distribution. This study focused on the effect of vegetation and its interaction with the season on ant species richness, density, activity, and composition in the three dominant habitats – forest, fallow, and mixed crop field – prevailing in southern Cameroon. Ants were sampled using two sampling techniques –pitfall trap and quadrat – in fallows, forest, and mixed crop fields from ...

    • Reliability of pheromone trap catches and maize plant damage as criteria for timing fall armyworm control interventions in humid forest agroecology of central Africa 

      Abang, A.; Nanga, S.N.; Ndanda, R.M.O.; Doumtsop Fotio, A.R.P.; Gonder, M.K.; Kouebou, C.; Suh, C.; Fotso Kuate, A.; Fiaboe, K.; Hanna, R. (2022)
      Control of fall armyworm (FAW) Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) since its invasion of Africa still depends on pesticides. Early detection of adults is considered the key to the success of larvae control in the crop field. However, FAW control thresholds based on current monitoring techniques are not well established in Africa. We investigated the efficacy of moth capture frequencies and FAW incidence levels as decision tools for FAW management. Experiments were conducted ...

    • Status of urban ecology in Africa: a systematic review 

      Awoyemi, A.G.; Ibáñez-Álamo, J.D. (2023-05)
      Urbanization is an extreme human activity and is expanding worldwide, consequently increasing the attention of scientists across research areas of urban ecology. Recent studies have warned of the lack of information from certain regions, particularly Africa, which is rapidly urbanizing. Thus, we did a detailed literature search to determine the state of knowledge in African urban ecology in the last century. We found 795 relevant papers from where data were collected and tested to understand ...

    • Biotechnology approaches in breeding for biotic stress resistance in yam (Dioscorea spp.) 

      Agre, A.P.; Mondo, J.; Edemodu, A.; Matsumoto, R.; Kolade, O.; Kumar, P.L.; Asiedu, R.; Akoroda, M.O.; Bhattacharjee, R.; Gedil, M.; Adebola, P.O.; Asfaw, A. (Springer, 2022)
      Yam (Dioscorea spp.) is a major staple and cash crop in tropical and subtropical regions. However, biotic (fungus, viruses, tuber rots, nematodes, insects, etc.) and abiotic stresses (drought, low soil fertility, etc.) substantially impact the productivity and quality of yam crop in regions where it is majorly cultivated. Developing and deploying resilient cultivars is a cost-effective and environmentally sound approach to enhance productivity in stressful environments. Breeding initiatives in yam ...

    • Marker-Assisted Selection (MAS): untapped potential for enhancing food and nutrition securities in sub-Saharan Africa 

      Abdullahi, W.M.; Mu'az, S.A.; Togola, A.; Mohammed, G.S.; Umar, M.L.; Ongom, P.O.; Echekwu, C.; Boukar, O. (Springer, 2022-11-17)
      Global food security has raised concerns for the rapidly growing population and extreme weather due to climate change. Conventional plant breeding deployed the current greatly fecund crops, but there must be an increase in the genetic improvement to meet the anticipated future demand. Existing crop breeding techniques and recent technologies could resourcefully be reconnoitered to increase crop improvement in the façade of increasingly perplexing production condition, which is discussed in this ...

    • Smallholder farmers' perception and challenges toward the use of crop residues and agro-industrial byproducts in livestock feeding systems in eastern DR Congo 

      Mutwedu, V.B.; Bacigale, S.B.; Mugumaarhahama, Y.; Muhimuzi, F.L.; Munganga, B.; Ayagirwe, R.; Dontsop-Nguezet, P.; Manyawu, G. (2022-07)
      The extent of crop residues and agricultural byproducts utilization for their integration in feeding systems in Eastern DR Congo was assessed in South-Kivu (Walungu territoire) and two territoires in the Tanganyika province (Kalemie and Moba territoires). Data were collected through 21 focus group discussions in which 273 farmers participated including respectively 116 (42%) from South Kivu and 157 (58%) from Tanganyika province. A logistic regression model was used to determine factors influencing ...

    • Micro-climatic variations across Malawi have a greater influence on maize susceptibility to aflatoxins than to fumonisins 

      Ng’ambi, J.T.; Atehnkeng, J.; Monjerezi, M.; Ngongondo, C.; Vunain, E.; Ching’anda, C.; Ortega-Beltran, A.; Cotty, P.J.; Matumba, L.; Bandyopadhyay, R. (2022-11-29)
      This study reports levels of aflatoxin and fumonisin in maize samples (n = 1294) from all agroecological zones (AEZs) in Malawi. Most maize samples (> 75%) were contaminated with aflatoxins and 45% with fumonisins, which co-occurred in 38% of the samples. Total aflatoxins varied across the AEZs, according to mean annual temperature (P < 0.05) of the AEZs. Samples from the lower Shire AEZ (median = 20.8 µg/kg) had higher levels of aflatoxins (P < 0.05) than those from the other AEZs (median = 3.0 ...

    • First report of Colletotrichum cliviicola causing anthracnose disease of cowpea (Vigna unguiculata L. Walp) in Nigeria 

      Dada, A.; Dania, V.; Oyatomi, O.; Abberton, M.; Ortega-Beltran, A. (2022-12-21)
      Cowpea (Vigna unguiculata L. Walp) is a staple crop for millions of people in sub-Saharan Africa. However, its production is challenged by various abiotic and biotic constraints, including fungal diseases. In February 2020, around 10% of cowpea plants in IITA-Ibadan research plots (N7°29'49'' E3°53'49'') had symptoms of cowpea anthracnose disease (CAD). Symptoms included reddish brown spots, necrotic lesions, and vein streaks (Fig. 1). Diseased leaves were collected and taken to the laboratory, ...

    • Impact of frequency of application on the long-term efficacy of the biocontrol product Aflasafe in reducing aflatoxin contamination in maize 

      Atehnkeng, J.; Ojiambo, P.; Ortega-Beltran, A.; Augusto, J.; Cotty, P.J.; Bandyopadhyay, R. (2022)
      Aflatoxins, produced by several Aspergillus section Flavi species in various crops, are a significant public health risk and a barrier to trade and development. In sub-Saharan Africa, maize and groundnut are particularly vulnerable to aflatoxin contamination. Aflasafe, a registered aflatoxin biocontrol product, utilizes atoxigenic A. flavus genotypes native to Nigeria to displace aflatoxin producers and mitigate aflatoxin contamination. Aflasafe was evaluated in farmers’ fields for 3 years, under ...

    • Spatial and temporal population dynamics of Aspergillus flavus in commercial pistachio orchards in Arizona 

      Ching’anda, C.; Atehnkeng, J.; Bandyopadhyay, R.; Callicott, K.; Orbach, M.J.; Cotty, P.J.; Mehl, H.L. (2022-06-09)
      Aspergillus flavus infects a wide range of crops, including pistachio, and subsequent aflatoxin contamination results in significant economic losses. Application of biocontrol products based on nonaflatoxigenic (atoxigenic) strains of A. flavus is one of the most effective tactics for controlling aflatoxins in crops. Both risk of aflatoxin contamination and effectiveness of biocontrol are influenced by the extent to which A. flavus spores move into pistachio tree canopies during periods of nut ...

    • Maize in sub-Saharan Africa 

      Kumar, P.L.; Bandyopadhyay, R.; Ortega-Beltran, A.; Menkir, A. (International Society of Plant Pathology, 2022)

    • Towards our phosphorus future 

      Brownlie, W.; Spears, B.M.; Heal, K.V.; Reay, D.S.; Benton, T.G.; Cordell, D.; Heathwaite, A.L.; Hermann, L.; Johnes, P.J.; Masso, C.; Mcdowell, R.; McGrath, J.W.; Metson, G.S.; Sakrabani, R.; Zhang, F. (UK Centre for Ecology and Hydrology, 2022-05)
      There are abundant opportunities to transition towards more sustainable phosphorus use. Taken collectively, these solutions unlock multiple environmental and societal benefits. Actions must be delivered cooperatively, as part of an integrated plan across sectors and scales. Indeed, coordinated action on phosphorus to support governments, existing conventions, and inter-governmental frameworks, as well as stakeholders, to catalyse improvements in phosphorus sustainability is urgently required. An ...