Theses and Dissertations: Recent submissions

Now showing items 61-72 of 72

    • La maladie des necroses racinaires du manioc (MNRM) en Republique Democratique du Congo et premiere evidence scientifique d'une transmission non virale 

      Bakelana, T.; Mahungu, N.M. (Universite de Kinshasa, 2020)

    • Genetic analysis of tuber yield and quality traits in white yam (Dioscorea rotundata Poir) 

      Norman, P.E.; Asfaw, A.A. (University of Ghana, 2019-12)
      The genetic progress in tuber yield and quality attributes of yam is constrained by prolonged breeding cycle, complex ploidy (2n=40, 60, 80), high heterozygousity, complex flowering pattern (dioecois and monoecious flowering and shy to flower), multi-species, low propagation ratio, biotic and abiotic factors. Genetic improvement of yam with high tuber yield, high dry matter content, starch and other food quality attributes using traditional and modern breeding techniques will contribute to the ...

    • Interseeding timing of cowpea (Vigna unguiculata L. Walp.) living mulch on weed diversity, physical soil properties and performance of maize (Zea mays L.) 

      Berdjour, A. (University of Development Studies, 2019)
      This trial was conducted to determine cowpea living mulch and maize maturity type effect on soil physical properties, maize yield and weed management. The study was a 3 x 4 factorial experiment laid out in Randomised Complete Block Design with 3 replications. Three maize maturity types: extra early Abontem, early Omankwa and medium Obatanpa and four living mulch systems: cowpea living mulch interseeded same day with maize (SDWM), cowpea living mulch interseeded 1 Week after planting maize (WAPM), ...

    • Evaluation of starches from selected yellow and white flesh cassava roots for noodles production 

      Akinde, H.A. (Federal University of Agriculture, Abeokuta, 2020)
      Cassava starch has been prospected in many food products manufacture. However, its suitability for making starch noodle has not been reported. Hence, this study was conducted to determine cassava starch‘s suitability in starch noodles production. The study was based on a completely randomized design with cassava variety as the main source of variation. The physicochemical properties [paste clarity (PCL), gel strength (GS), retrogradation], amylose content (AC), thermal properties [onset temperature, ...

    • Productivity, water use and climate resilience of alternative cocoa cultivation systems 

      Abdulai, I. (Georg-August-University of Gottingen, 2017-12)
      Global demand for cocoa beans is projected to keep rising while future production is likely to be limited by climate variability and change. Over 70% of the global cocoa supply comes from West Africa, a region expected to be greatly affected by climate change and extreme droughts. Cocoa production in West Africa needs to be adapted to more marginal and extreme climatic conditions, mainly drought, to sustain production and avoid further deforestation of the remaining rainforest for its cultivation. ...

    • Efficacy of cassava-maize intercrop on weed control and yield of component crops 

      Ejalonibu, M.S. (University of Ilorin, 2019)
      Low yield of maize/cassava intercrop is majorly due to some identified constraints like poor density of component crops, inappropriate application of fertilizer and weed infestation. This study was conducted in Otukpo-Icho, southern Guinea savanna of Nigeria and Igbariam, Humid Tropical Forest of Nigeria during 2018/2019 cropping season to determine the weed control efficiency and performance of cassava/maize intercrop. The trials were laid out as randomized complete block design in a factorial ...

    • Genetic analysis of resistance to Radopholus similis in Banana 

      Habineza, J.C. (Makerere University, 2019-12)
      Banana is an important crop worldwide mostly grown in tropical and subtropical regions, of annual production is 145 million metric tons valued at 26.5 billion Euros. Banana production is threatened by various constraints including pests and diseases. Among the pests, Radopholus similis is the most destructive species. East African Highland Bananas mostly grown in Uganda and other parts of East Africa are highly susceptible to this species with yield reduction reaching 80%. Breeding for resistance ...

    • Responses of the Ethiopian fruit fly, Dacus ciliatus (Diptera, Tephritidae) to colored rectangles, spheres, and ovoids 

      Vayssieres, J.; Dal, F. (2004)
      On the Mascarene Islands, the Ethiopian fruit fly, Dacus ciliatus Loew, is one of the major frugivorous pests of Cucurbitaceae. Both visual and olfactory signals involved in the host location process need to be evaluated to better understand the behaviour of this species, and to improve trapping. This article reports results of our studies with visual stimuli. Responses of immature and sexually mature females and males were studied in two outdoor field cages. The reaction of cohorts of 150 adults ...

    • Genetic analysis of host plant resistance to the cassava mosaic disease 

      Lokko, Y.R.N.N. (2002)
      The genetic control of resistance to the cassava mosaic disease (CMD) in some African landraces, their relationship with the widely used resistant genetic stock, clone 58308, and molecular markers associated with resistance to CMD in the landraces were evaluated in this study. 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 ...

    • Economic evaluation of adoption of improved soybean production and utilization technologies in Kaduna and Kano States Nigeria: P.hD. thesis 

      Ojiako, I.A. (2006)
      Low yield, persistent pod shattering and susceptibility 10 pests and diseases characterize the cultivation of traditional soybean varieties in Nigeria. Research has, however, developed new improved variety of soybeans, like TGx 1448-2E that is cultivated in Kaduna and Kano States. Local food items that incorporate soybeans are equally used to improve the nutritional value of foods. This study investigates the socio-economic lac tors that influence the adoption of improved soybean innovations, ...

    • Capital market operations in an emerging economy: the case of Nigeria 

      Ojo, M. O. (2008)
      One of the key challenges facing big businesses is how to secure the huge financing they need to invest in their businesses. From banking, insurance, pharmaceuticals, conglomerates, oil and gas companies and every other sector of the economy, the story is the same. Everyone faces the challenge of funds generation for executing their developmental projects and generally keeping the engine of their businesses running. The government, in a bid to solve this problem, established the Nigerian Securities and ...

    • Gender dynamics in smallholder vegetable production: insights from Tanzania 

      Patt, N. (Freie Universität Berlin, 2017)
      The presented study investigates gender dynamics in vegetable producer’s households as related to labor, income and expenditure allocation – as field that has not yet been sufficiently covered by research. It is conducted in cooperation wth the “Africa Research in Sustainable Intensification for the Next Generation” (Africa RISING) project funded by the United States Agency for International Development (USAID) and led by the International Institute of Tropical Agriculture (IITA). The study focuses ...