Doctor of Philosophy (PhD): Recent submissions

Now showing items 221-240 of 373

Behavioural Responses of Rhipicephalus Appendiculatus Neumann 1901 and Rhipicephalus Evertsi, Neumann 1987 (Acari: Ixodidae) to Host and Non-host Semiochemicals

Noel, Sika Fra Kutua (Kenyatta University, 2012)

On-host observations and laboratory behavioral assays were undertaken to investigate the role played by semiochemicals in the location of feeding sites by unfed adults of Rhipicephalus appendiculatus Neumann and Rhipicephalus ...
Physiological and Molecular Responses in Adult and Larvae Anopheles Gambiae S.S. to Murraya Koenigii Phytochemicals

Mang'era, Clarence Maikuri (Kenyatta University, 2014)

Continuous application of synthetic insecticides causes development of resistance in vector species, biological magnification of toxic substances through the food chain and adverse effects on environmental quality and ...
The Biology and Ecology of Mussidia spp. (Lepidoptera: Pyralidae) and Associated Natural Enemies in Kenya.

Muli, Benjamin Kimwele (North West University, 2009)

Mussidia nigrivenella Ragonot (Lepidoptera: Pyralidae), an important pest of maize, cotton and Phaseolus bean in West Africa, has never been described as a crop pest from East and southern Africa (ESA). It was hypothesized ...
Long -Term Vegetation Dynamics over the Bani River Basin as Impacted by Climate Change and Land Use

Traore, Souleymane Sidi (Kwame Nkrummah University of Science and Technology, 2015)

This study investigated the long-term trends in vegetation and rainfall and the extent and rate of vegetation change over the Bani river Basin at multiple spatial and temporal scales in relation to local and regional ...
Dynamics of Napier stunt phytoplasma between the cultivated and wild graminae in East Africa

Asudi, George Ochieng (North-West University (Potchefstroom Campus), 2015)

Cultivation of Napier grass, Pennisetum purpureum, the most important livestock crop in East Africa is severely constrained by Napier Grass Stunt (NGS) disease. The disease spreads via an insect vector or vegetative ...
Modelling vector-borne diseases: epidemic and inter-epidemic activities with application to Rift Valley fever

Sansao, Agostinho Pedro (University of the Witwatersrand, Johannesburg, 2016)

In this thesis in order to study the complex dynamics of Rift Valley fever (RVF) we combine two modelling approaches: equation-based and simulation-based modelling.In the first approach we first formulate a deterministic ...
Isolation and Identification of Behaviourally Active Semiochemicals from Human Foot Odour as Attractants for African Malaria Vectors

Omolo, Maurice Ochilo (Kenyatta University, 2005)

Despite their small size and short lifetime, mosquitoes (Diptera: Culicidae) are vectors of diseases of vast economic and medical importance. They transmit life threatening human and animal diseases, in addition to their ...
Fungal Entomopathogens (Metarhizium Anisopliae and Beauveria Bassiana) or Aphid Management: Variability in Pathogenicity, Species Attributes and Interactions with other Natural Enemies

Wakuma, Bayissa Hundessa (University of Nairobi, 2016)

Aphids are regarded as one of the most important pest problems of vegetable crops worldwide. Most vegetable growers in sub-Saharan Africa heavily rely on chemical insecticides for control of aphids. However, the synthetic ...
Effects of Drought on the Production of Electrophysiologically Active Biogenic Volatiles Important for Cereal Pest Management

Chidawanyika, Frank (University of the Witwatersrand, 2014)

Drought has the potential to reset trophic interactions within natural and managed ecosystems. I tested how drought stress in maize and companion plants that are used in cereal agroecosystems of Kenya affect oviposition ...
Malaria risk among fishermen of Rusinga Island, Western Kenya:an Assessment of different Malaria Transmission Metrics and Human Behaviour

Olanga, Evelyn Adhiambo (University of Nairobi, 2016)

Studies were conducted to determine whether capture fishing and associated activities place individuals engaging in them at higher risk of contracting malaria. Consequently, a strategy was developed to create awareness of ...
Studies on the Distribution, Ecology and Preventive Management of Thrips (Thysanoptera: Thripidae) on Onions in Kenya

Waiganjo, Monicah Mukami (Kenyatta University, 2012)

The onion thrips, Thrips tabaci Lindeman, is the most destructive insect pest of onion, Allium cepa L. worldwide. Despite the heavy losses incurred as a result of damage by the onion thrips, very little efforts have been ...
Estimating the impacts of climate change on interactions between different lepidopteran stemborer species

Ntiri, Eric S (Potchefstroom Campus of the North-West University, 2015)

The production of cereals, especially maize, which is a staple food in sub-Saharan Africa, is challenged by pests and diseases. In addition, climate change will exacerbate the magnitude of these challenges and agriculture ...
Development of a Gravid Mosquito trap for Surveillance of the Malaria Vector Anopheles Gambiae S.I. Giles (Diptera: Culicidae)

Sisay, Dugassa Lemma (University of Nairobi, 2014)

This study was intended to develop a trap for surveillance of gravid malaria vectors,Anopheles gambiae s.l., in outdoor venue.First, a suite of tools were developed for studying the oviposition behaviour of gravid An. ...
Development and Calibration of an Exposure-Free Bednet Trap for the Sampling of Afrotropical Malaria Vectors

Mathenge, Evan Murimi (University of Nairobi, 2004)

Interventions aimed at reducing malaria vector populations through impregnated bednets, environmental management, residual indoor spraying etc., require monitoring of mosquitoes before, during and after the intervention. ...
Identification and distribution of thrips - vectored tospoviruses And management of iris yellow spot virus in onion

Birithia, Rael K (University of Nairobi, 2013)

Tospoviruses are globally distributed on wide range of host plants, inflicting yield losses of up to $1 billion on vegetables. Tomato spotted wilt virus (TSWV) was first reported in Nakuru, Kenya on tomatoes with economic ...
Potential of Oecophylla longinoda (Hymenoptera: Formicidae) for management of Helopeltis spp. (Hemiptera: Miridae) and Pseudotheraptus wayi (Hemiptera: Coreidae) in cashew in Tanzania

Olotu, Moses Iwatasia (Potchefstroom Campus of the North-West University, 2012)

Cashew, Anacardium occidentale Linnaeus, is an economically important cash crop for more than 300,000 rural households in Tanzania. Its production is, however, severely constrained by infestation by sap-sucking insects ...
Oviposition Cues as a Tool for Developing a New Malaria Control Strategy

Eneh, Lynda Kirie (Kungliga Tekniska Högskolani Stockholm, 2016)

Anopheles gambiae sensu lato mosquitoes are among the dominant malaria vectors in sub-Saharan Africa. However, not much is known about the oviposition behaviour of these species. This knowledge is important for the development ...
Attractiveness of Sand Fly Baits and the Effects of Long-Lasting Insecticidal Nets on the Feeding Behaviour and Survival of Phlebotomus (Phlebotomus) Duboscqi Neveu-Lemaire (Diptera: Psychodidae).

Kasili, Sichangi (Jomo Kenyatta University of Agriculture and Technology, 2015)

Control of phlebotomuine sand flies is of utmost importance because of the role they play as vectors of leishmaniases and other diseases. Long-lasting insecticidal nets (LLINs), as possible tools for control have not been ...
Distribution, Behavioural Biology, Rearing and Pollination Efficiency of Five Stingless Bee Species (Apidae: Meliponinae) in Kakamega Forest, Kenya.

Kiatoko, Nkoba (Kenyatta University, 2012)

The study on distribution, behavioral biology, rearing and pollination efficiency of five stingless bee species (Apidae: Meliponinae) in Kakamega forest, Kenya showed that; species diversity was higher at Ivihiga compared ...
Elicitation of Anti-Mosquito Immune Responses in Balb/c Mice Immunized With Plasmids Containing Anopheles Gambiae Mucin 1 (Agmuc1), GM-CSF and IL-12 Genes

Injera, Wilfred Emonyi (Kenyatta University, 2013)

Various strategies that block malaria transmission from an infected human host to a female Anopheline mosquito that involve killing of the blood fed mosquito have been studied as a potential strategy to control malaria. ...

Now showing items 221-240 of 373

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