Doctor of Philosophy (PhD): Recent submissions

Now showing items 281-300 of 373

Ecology and Biologically Based Management of Cereal Stemborers on Maize and Sorghum in the Amhara State of Ethiopia

Wale, Ferede Melaku (Kenyatta University, 2006)

A series of studies were conducted in an attempt to establish baseline data on the importance and geographic distribution of stemborers and to determine key interactions among a whole range of factors, abiotic - i.e., ...
Studies of Potential Predators of the Tomato Red Spider Mite Tetrancychus Evansi (Baker and Pritchard) for Possible Introduction as Biocontrol Agents in Africa

Komi, Kouma Mokpokpo (Kenyatta University, 2007)

The tomato red spider mite, Tetranychus evansi Baker & Pritchard, is an important exotic pest in small-scale production of tomatoes and other solanaceous plants in Africa. The mite most probably originated from Southern ...
Plant-Feeding Behaviour and its Effects on the Fitness and Competence of the Malaria Vector Anopheles Gambiae (Diptera: Culicidae)

Manda, Hortance (Kenyatta University, 2007)

Malaria remains a serious threat in sub-Saharan Africa Available control tools are now largely ineffective. Because of the role of vectors in malaria transmission, integrated vector management strategies that are environmentally ...
Impact Assessment of Natural Enemies on Stem Borer Populations and Maize Yield in Three Agroecological Zones in Mozambique

Cugala, Domingos Raquene (Kenyatta University, 2007)

Lepidopteran stem borers are the major pests limiting the production of maize and grain sorghum under subsistence farming conditions of Southern Africa. Classical biological control has traditionally emphasized the control ...
Studies on the Midgut Lectin Gene of Glossina Austeni

Amin, Daniel, N. (Kenyatta University, 2005)

Trypanosomiasis continues to be a serious problem in sub-saharan Africa. The inadequacies of existing control strategies necessitate the development of alternative control measures. In most cases, the causative agents of ...
Geographic Variation in the Development of Cotesia Sesamiae (Hymenoptera: Braconidae) on Busseola Fusca (Lepidoptera : Noctuidae) in Kenya: Polydnaviruses and Co-Evolutionary Dynamics

Gitau, Anne Catherine (Kenyatta University, 2006)

Microgastrine endoparasitoids co-inject symbiotic viruses known as polyDNAviruses (PDV) together with other wasp factors such as the venom and calyx fluid proteins during oviposition in hosts. These factors disrupt the ...
Assessment by Performance Attributes of Indigenous Egg Parasitoids (Hymenoptera: Trichogrammatidae for Biocontrol of African Bollworm (Helicoverpa Armigera) in Kenya

Kalyebi, Andrew (Kenyatta University, 2004)

Trichogrammatid egg parasitoids are used extensively for the control of several lepidopteran pests in many areas of the world. They ar~he most promising biological control agents for inundative releases against the ...
Population Ecology of Diamondback Moth, Plutella Xylostella L. (Lepidoptera: Plutellidae) and its Parasitoid in Ethiopia

Gashawbeza, Ayalew (Kenyatta University, 2003)

The objective of this study was to generate information on the ecology of Diamondback moth (DBM) (Plutella xylostella L.) and the parasitoids associated with it with emphasis on parasitism for the purpose of strengthening ...
Development of Molecular Markers for Species Diagnosis and Analysis of Genetic Diversity in African Fruit Fly Populations

Baliriane, Frederick N. (University of Nairobi, 2004)

In this study, the possibility of using Ceratitis capitata (medfly)-derived microsatellites both for developing an SSR-based species-diagnostic peR assay and studying the genetic structures of a range of congeneric, ...
An Assessment of the Use of Botanical Extracts and Pheromes for the Off-Host and On-Host Control of Amblyomma Variegatum Tick

Toure, Alioune (Kenyatta University, 2005)

The livestock tropical bont tick, Amblyomma variegatum Fabricius, is a pest of major economic importance in Africa where it is the vector of Cowdria ruminantium that causes Headwater, disease in cattle. Its control has ...
Evaluation of the Potential of Hyphomycetes Fungi for the Management of the African Tephritid Fruit Flies Ceratitis Capitata (Weidemann), Ceratitis Cosyra (Walker) and Ceratitis Fasciventris (Bezzi) In Kenya

Dimbi, Susan (Kenyatta University, 2012)

Tephritid fruit flies are among the major pests of fruits and vegetables worldwide and represent the most economically important group of phytophagous Diptera. Their control has basically depended on the use of chemical ...
Stemborer Parasitism by Cotesia Sesamiae and Strurmiopsis Parasitica and an Assessment of the Need to Introduce Cotesia Flavipes into Zimbabwe

Chinwada, Peter (Kenyatta University, 2002)

Stemboreres are major pests of maize and sorghum in Zimbabwe. An analysis of the research work on cereal stemborers in the country revealed several gaps for which information is required. Thus, as a way of bridging the ...
Interactions between striga Hermonthica (fel.) benth (scrophulariaceae) and stemborer chilo partellus (swinhoe) (lepidoptera : pyralidae) on Maize plant (Zea mays L.)

Mohamud, Mohamed Hassan (Kenyatta University, 2012)

A study on the interactions between Striga hermonthica (Del.) Benth, and stemborer [Chilo partellus (Swinhoe) (Lepidoptera: pyralidae)] on maize plant (Zea mays L.) hybrid (511) was carried out at ICIPE Mbita Point Research ...
Bioecology and population dynamics of red spider mites( a cari: tetranychidae) on tomato in small scale production systems in Kenya

Sarr, Ibrahima (Kenyatta University, 2012)

Tomato, Lycopersicon esculentum Mill. (Solanaceae) is one of the most important vegetables grown in Eastern and South Africa for local consumption and income generation by small scale farmers. Yet, yields of the crop are ...
Ecological analysis of stem borers and their natural enemies under maize and sorghum based agro ecosystems in Ethiopia

Degaga, Emana Getu (Kenyatta University, 2012)

Maize and sorghum are the most important food crops in Ethiopia covering over 29% of the total cultivated land. Stem borers result in 20-50% loss to these crops. In the current study, ecology of stem borers and their natural ...
Breeding of the Honey Bee (Apis Mellifera l.) and its Potential for Royal Jelly Poduction in Kenya

Maundu, Elliud M. (Kenyatta University, 2004)

Royal jelly is a creamy, milky white, strongly acidic and highly nitrogenous substance secreted by the hypopharyngeal and mandibular glands of worker honey bees at the ages of 5 - 15 days of age. The jelly is fed to queens ...
Genetic diversity in banana weevil Cosmopolites sordidus, populations in Banana growing regions of the world

Ochieng, Vincent Oduol (University of Nairobi, 2001)

Genetic variability in banana weevil populations was analyzed in a large number of samples obtained from 15 banana growing tropical countries using random amplified polymorphism DNA (RAPD). A total of 46 RAPD markers ...
Studies on native trichogramma (hymenoptera: trichogrammatidae) for biocontrol of selected lepidopteran pests in Kenya

Abera, Teklemariam Haile (Kenyatta University, 2012)

Trichogramma species parasitise eggs of Lepidoptera and have been extensively used in augmentative biological control. Studies were conducted during 1997-2001 on the native egg parasitoids occurring in Kenya. The objectives ...
Distribution importance and management of stemborers (lepidoptera) in maize production systems of semi-arid Eastern Kenya with emphasis on biological control

Songa, Josephine (Kenyatta University, 2012)

The bulk of maize, which is the main staple food in semi-arid Eastern Kenya, is grown by subsistence small-scale farmers, and the yields are usually low, averaging 500kg/ha Stemborers are one of the major causes of these ...
Comparative studies on the adult dispersal behaviour of busseola fusca (fuller) (Lepidoptera:Noctuidae) and chilo partellus swinhoe (lepidoptera:pyralidae)

Mbugi, Jenard Patrick (Kenyatta University, 2004)

Two oil soluble dyes, Calco Red N-1700 and Sudan Blau-670 were added to the artificial diet of Chilo partellus and Busseola fusca. The two dyes effectively marked the larvae, adults, eggs and first stage F1 larvae. The dye ...

Now showing items 281-300 of 373

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