Doctor of Philosophy (PhD): Recent submissions

Now showing items 241-260 of 373

Studies on the Ecology of Hive Beetles in Kenya

Ayuka, Teboh Fombong (University of Nairobi, 2012)

Although beekeeping has become an important economic venture in Kenya, and is being used to alleviate poverty and promote environmental conservation, very little information exists on arthropods associated with honey bees ...
Stemborer Oviposition-induced Volatile Semiochemicals in Maize and their effects on the behaviour of Parasitoids.

Abamo, Amanuel Tamiru (Kenyatta University, 2012)

Plants have evolved direct and indirect defence strategies against attacking organisms. Directly, they produce toxins, digestion inhibitors and herbivore- induced plant volatiles (HIPVs) repellent to phytophagous insects; ...
Response of Grasshoppers to the Agricultural Mosaics of the Cape Floristic Region Biodiversity Hotspot in South Africa

Adu-Acheampong, Samuel (Stellenbosch University, 2017)

Agricultural production is one of the main drivers of the on-going biodiversity crisis. This has resulted in research on the impact of agriculture on biodiversity being at an all-time high. This is critical given that the ...
Development of a Genetic Linkage Map and Quantitative Trait Loci (QTL) analysis in Cowpea (vigna unguiculata (L) Walp)

Mabeaselassie, Andargie (Kenyatta University, 2010)

Cowpea is a diploid plant species which contributes significantly to food security in developing countries, especially in Africa. This research project was carried out in view of the upcoming introduction of Bt cowpea in ...
Behavior of Tetranychus evansi on tomato and interaction with its predator Phytoseiulus longipes . Application for an Integrated Pest Management Strategy in Tropical Conditions

Azandeme-Hounmalon, Yeyinou Ginette (Institut des Régions Chaudes (IRC) -Montpellier SupAgro, France, 2015)

Tetranychus evansi is an invasive pest observed in East Africa and West to the 2000s, which causes damage to strong economic impact on Solanaceae. Its outbreaks generally lead to intensive chemical control with products ...
Bioecology of the Mango Mealybug,Rastrococcus Iceryoides Green (hemiptera: pseudococcidae) and its Associated Natural Enemies in kenya and Tanzania

Tanga, Mbi Chrysantus (University of Pretoria, 2012)

Rastrococcus iceryoides Green (Hemiptera: Pseudococcidae), an alien invasive mealybug pest of Asian origin was first detected in Tanzania in 1989. This pest rapidly spread by the mid-1990s and was soon present in Coastal ...
Ecology, Livelihoods and Rift Valley Fever Disease in Ijara Division, Garissa County, North Eastern Kenya

Muga, Geoffrey O (University of Nairobi, 2016)

Although scholars have advocated for a multi-disciplinary approach to the study of human and animal health, available evidence suggests that such studies are still limited. This thesis attempts to bridge this gap by focusing ...
Carbon Stocks Variability in Agro Ecosystems along an Altitudinal Gradient: A Case Study of Taita Hills, Kenya

Njeru, Crispus Mugambi (University of Nairobi, 2016)

This study quantifies the effect of land cover change and seasonality on soil organic carbon and carbon dioxide emissivity. It takes to account the coupled inter-relationships with other ecological factors such as temperature ...
Relative Efficacy and Economics of dissemination Pathways for Developing Optimal Expansion Strategies for Push-Pull Technology in Eastern

Murage, Warukira Alice (Egerton university, 2011)

follow link to:http://34.250.91.188:8080/xmlui/handle/123456789/266 click on link to view abstract.
The Behavior, Ecology and Control of Legume Flower Thrips, Megalurothrips Sjostedti (Trybom) In Cowpea Vigna Unguiculata (L.) Towards the Development of an Integrated Pest Management (IPM) Program in Kenya

Bayleyegn, Andnet, A. (2015)

The overarching aim of this thesis is to investigate the behaviour and ecology of the legume flower thrips Megalurothrips sjostedti Trybom and develop alternative control method. Its specific goals are to: (1) assess pest ...
Entomopathogenic Fungi: a Component of Leafminer Management

Migiro, Lorna Nyangarisa (North-West University (Potchefstroom campus, 2010)

The invasive leafminers Liriomyza sativae (Blanchard), Liriomyza trifolii (Burgess) and Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae) are major pests of many vegetable and ornamental crops worldwide. In ...
Molecular characterisation of Honey bees, Apis Mellifera subspecies in East Africa

Kibogo, Harrison Gathenga (Jomo Kenyatta University, 2017)

Honey bee, Apis mellifera subspecies from East African populations were evaluated for phylogenetic relationships using mitochondrial markers. Apis mellifera scutellata, A. m. litorea and A. m. monticola were found to have ...
Termite raiding by the Ponerine ant Pachycondyla Analis (hymenoptera: formicidae): Behavioural and Chemical Ecology

Abdullahi, Ahmed Yusuf (University of Pretoria, 2010)

The ant Pachycondyla analis (formerly Megaponera foetens, commonly known as the Matabele ant) is a widespread ponerine in sub-Saharan Africa. It feeds solely on termites of economic importance belonging to the sub-family ...
Identification of Chemical Signals that Influence the Oviposition Behaviour of Anopheles Gambiae and Exploration of their Potential in Mosquito Control

Wachira, Sabina Wangui (Jomo Kenyatta University, 2009)

The African mosquito species Anopheles gambiae and An. funestus are ranked high among the world’s most efficient vectors of human malaria. Their juvenile stages develop in aquatic environments while adults are terrestrial. ...
Potential for the establishment of Cylas punticollis Boheman (Coleoptera: Apionidae) as a pest of sweetpotato in Lesotho

Nteletsana, Lefulesele (University of Pretoria, 2000)

Sweetpotato, Ipomoea batatas (L.) Lamarck was introduced into Lesotho in 1992 in the hope that it would help alleviate poverty levels. Efforts are being made to learn the potential constraints to optimal production of this ...
Spatial distribution and biology of Gonometa postica Walker (Lepidoptera: Lasiocampidae) with reference to its key parasitoids on Acacia species in Mwingi, Kenya

Fening, Okwae Ken (Kenyatta University, 2008)

The African wild silkmoth, Gonometa postica Walker produces silk of high quality. A study on the spatial distribution and biological and biology of G. postica on host and non-host plants and the parasitism rates and ...
Development of formulations and delivery systems to control Economically important ticks with Entomopathogenic fungi

Felix, Nchu (University of Pretoria, 2009)

Due to the rapid development of tick resistance to synthetic chemical acaricides and the potential risk posed by these chemicals to non-target species, efforts are intensifying towards the development of entomopathogenic ...
Morphological and genetic diversity of the new invasive species Bactrocera invadens (Diptera: Tephritidae) in Africa

Fathiya, Mbarak Khamis (Kenyatta University, 2009)

Species of the genus Bactrocera in the family Tephritidae, or 'true fruit flies', are among the most important pests of fruits and vegetables. Because of the broad larval host range and cosmopolitan distribution, pest fruit ...
Beekeeping and forest conservation : a case study of Arabuko Sokoke Forest, Kenya

Okoth, Susan Sande (University of Pretoria South Africa, 2010)

Tropical forests are shrinking worldwide. This is mainly because human beings, in a bid to obtain a livelihood, have overexploited their timber and non-timber products. At Arabuko Sokoke Forest (ASF), Kenya, community-driven ...
Predatory and Plant-Use Specialization by Evarcha Culicivora, an East African Salticid Spider

Deng, Chan (University of Canterbury, 2016)

Using Evarcha culicivora, a salticid spider from East Africa, my goal was to understand some of the different specific ways in which predatory specialization might be expressed. This spider was already known for its unusual ...

Now showing items 241-260 of 373

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