Doctor of Philosophy (PhD): Recent submissions

Now showing items 321-340 of 373

Studies on the aggregation pheromone of adult Malagasy migratory locust, Locusta migratoria capito (Saussure, 1884) and its effects on conspecific nymphal stages

Razafindraleva, Herisolo Andrianiaina (Jomo Kenyatta University of Agriculture and Technology., 2010)

Locusta migratoria capito is the major agricultural pest to cereal production inMadagascar. Unlike other members of this species (e.g. L. migratoria migratorioides and L. migratoria manilensis), hardly any study has been ...
Novel insecticides and application strategies for malaria vector control

Mbare, Oscar Ochieng (University of London, 2015)

Targeting malaria vector mosquitoes outdoors has become a research priority to address residual malaria transmission. Mosquito larval source management provides an excellent and well established tool. However, there is a ...
Ecology and population genetic structure of strains of Teretrius Nigrescens (Coleoptera: Histeridae), predator of Prostephanus truncatus (Coleoptera: Bostrichidae

Oduor, Bonaventure Omondi Aman (North West University (Potchefstroom Campus), 2009)

The larger grain borer (LGB) Prostephanus truncatus (Horn) is the most important pest of farm stored maize and cassava in Africa. This alien invasive species was introduced into the continent from Mesoamerica in the late ...
Laboratory and semi-field evaluation of some Vitex species for larvicidal activity against Anopheles gambiae larvae

Mokua, Gladys Nyamoita (Institute of Traditional Medicine Muhimbili University of Health and Allied Sciences, 2014)

Background: Over two billion people in tropical countries are at risk from mosquitoborne diseases such as dengue fever, hemorrhagic fever, malaria and filariasis. It is estimated that US$ 2 billion is spent annually on ...
Basis of host recognition by the larval endoparasitoids: Cotesia sesamiae Cameron and Cotesia flavipes (Cameron) (Hymenoptera: Braconidae)

Obonyo, Amos Owino Meshack (North-West University (Potchefstroom Campus) South Africa, 2009)

Host recognition behaviour of two braconid larval parasitoids Cotesia sesamiae and Cotesia flavipes was studied using suitable stemborer hosts [i.e. Busseola fusca for C. sesamiae, and Chilo partellus for C. flavipes] and ...
Evaluation of Tick-trefoil (Desmodium species) for Drought Tolerance and Control of Witchweed {Striga hermonthica (Del.) Benth.} in Grain Sorghum and Branched Broomrape (Orobanche ramosa L.) in Tomato

Khogali, Izzeldin Idris Elsayed (Agricultural Sciences University of Gezira, 2009)

Parasitic weeds of the genera Striga and Orobanche pose a severe problem for agriculture because they are difficult to control and are highly destructive to several crops. The present study was undertaken to evaluate ...
Diversity, ecology and population dynamics of Lepidopteran stem borers in kenya

Ong’amo, George Otieno (kenyatta university, 2009)

Stem borers are important field insect pests of maize [Zea mays L.] and sorghum [Sorghum bicolor (L.) Moench] in Africa. They account for more than 30% yield losses depending on the composition of the pest community. A ...
Genome-wide annotation of chemosensory and glutamate-gated receptors, and related genes in glossina morsitans morsitans tsetse fly

Opondo, Obiero, George Fredrick (University of the Western Cape, South Africa, 2014)

Tsetse flies are the sole vectors of trypanosomes that cause nagana and sleeping sickness in animals and humans respectively in tropical Africa. Tsetse are unique: both sexes adults are exclusive blood-feeders, females are ...
Effects of drought on the production of electrophysiological 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 ...
Field release and recovery of leafminer endoparasitoid Phaedrotoma scabriventris Nixon (Hymenoptera: Braconidae), its interactions with local parasitoids and behavioral responses to hosts in vegetable production systems in Kenya

Foba, Caroline Ngichop (Jomo Kenyatta University of Agriculture and Technology, 2015)

Liriomyza leafminers (LMF) (Diptera: Agromyzidae) are severe pests of vegetables and ornamentals worldwide. Parasitoids complex regulate LMF populations in their native and invaded areas while in Kenya, previous studies ...
Studies on the nymphal aggregation pheromone of Malagasy Migratory Locust, Locusta migratoria capito (Saussure, 1884) and its effects on adult maturation.

Razafindranaivo, Victor (Jomo Kenyatta University of Agriculture and Technology, 2010)

The Malagasy migratory locust, Locusta migratoria capito (Saussure, 1884), is the most destructive pest in the Malagasy agricultural production system. The recent plague between 1996 and 2000 during which economic losses ...
Evaluation of introduced parasitoids against bactrocera Invadens and their interaction with bactrocera Invadens natural enemies

Appiah, Ernest Felix (University of Ghana, Legon, 2011)

The invasive fruit fly Bactrocera invadens (Drew, Tsurata & White 2005) is causing extensive socio-economic losses in West Africa as a pest in mango production. In addition to reducing crop quality and decreasing fruit ...
An evaluation of the effects of information and technology characteristics on technology choice and adoption The case of Striga and Stemborer control technologies in maize production in western Kenya

Mwihaki, Njuguna, Esther (University of Nairobi, 2009)

Kenya’s population is increasing, thus leading to increased demand for food, especially maize which is a staple food for most of the Kenyan population. Demand for maize in Sub Saharan Africa is projected to double to 52 ...
Diversity and ecological preference of parasitoids Associated with lepidopteran stem borers in kenya

Mailafiya, Duna Madu (Kenyatta University, 2009)

Field surveys were carried out from 2005 to 2007 to assess parasitoid species diversity and stem borer parasitism in cultivated and natural habitats in four agroecological zones in Kenya. To increase the chances of collecting ...
Exploiting early herbivory-induced defense traits in Zea species for the management of Chilo partellus in East Africa

Mutyambai, Daniel Munyao (2015)

Maize, a genetically diverse crop, is the third largest cereal crop in the world and the most important staple cereal in sub-Saharan Africa, supplying 50% of the calorie intake in this region. The stemborer Chilo partellus ...
Circulation, reassortment and transmission of ngari and bunyamwera viruses in northern kenya.

Otieno, Odhiambo Collins (University of Pretoria, 2015)

Kenya has experienced severe arboviral outbreaks of public health concern in the recent past, including yellow fever (YF), Crimean Congo hemorrhagic fever (CCHF), chikungunya, and Rift Valley fever (RVF) among others. Most ...
Odour-based strategies for surveillance and behavioural disruption of host-seeking malaria and other mosquitoes

Mweresa, Collins K. (Wageningen University, 2014)

Malaria is one of the most important diseases that threaten the lives of a large proportion of the human population in the tropics. Currently, the application of novel technologies for malaria control is encouraged to ...
The effect of fungal endophytes on thrips and tospovirus epidemiology

Muvea, Alexander Mutua (Gottfried Wilhelm Leibniz Universität Hannover, 2015)

Onion thrips, Thrips tabaci Lindeman are one of the key pests of onion, Allium cepa L., an economically important agricultural crop cultivated worldwide. Thrips are commonly managed through indiscriminate application of ...
Host-Marking Behaviour and Pheromones in Major Fruit Fly Species (Diptera: Tephritidae) Infesting Mango (Mangifera Indica) in Kenya

Kachigamba, Donald Limbani (Jomo Kenyatta University of Agriculture and Technology, 2012)

A laboratory study was conducted on six major fruit fly species infesting mango in Kenya (Ceratitis capitata, C. fasciventris, C. rosa, C. cosyra, C. anonae and Bactrocera invadens) regarding host-marking behaviour and ...
Diversity in structure, composition and properties of silk from African wild silkmoths

Kebede, Addis Teshome (University of Nairobi, 2012)

Wild silk production is a unique eco-friendly agro-practice with enormous potential for income generation and additional benefit of compatibility with conservation goals. African wild silkmoths occur in three major families; ...

Now showing items 321-340 of 373

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