Browsing Doctor of Philosophy (PhD) by Title

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Acoustic detection of insect pests of stored grains in Kenya

Njoroge, Anastasia Wanjiru (Universität Kassel, 2017)

Grain production by Kenyan farmers, an important resource for their food security, faces constant challenges from pre- and post-harvest conditions favorable to rapid growth of insect populations. Currently, Kenya must ...
Adaptation of Trypanosoma (NANNOMONAS) Congolense broden 1904 types to different hosts and transmission by Glossina species

Masaninga, Freddie (University of Zambia, 2012)

The influence of host bLood on midgut infection, maturation rates in Glossina species, transmission and virulence to mice of Trypanosoma congolense DNA types was investigated. The study was also coiKiucted to identify an ...
Adaptation options of small-scale Farmers to the Climate change impacts in aAgeyo-Setema Area, Jimma Zone, SouthWestern Ethiopia

Teshome, Girma Eshetu (Jimmaa University College of Agriculture, 2015)

Climate change is a key emerging threat to the lives and livelihoods of smallholder farmers in Ethiopia. This study examines small-scale farmer adaptation strategies to climate change and climate variability, and the factors ...
Allelochemicals from sorghum bicolor that stimulate feeding by the larvae of the stem borer chilo partellus

Torto, Baldwyn (Department of Chemistry University of Ghana LEGON, 1988-08)

Feeding bioassays with cellulose acetate discs impregnated with the hexane, ethyl acetate and methanol extracts of the leaf-whorls of field grown plants of sorghum cultivars IS 18363 (susceptible) and IS 2205 {LdSistant) ...
Allelochemicals from Sorghumm Bicolor that stimulate feeding by the Larvae of the stem borer Chilo partellus

Torto, Baldwyn (University of Ghana, 1988)

Feeding bioassays with cellulose acetate discs impregnated with the hexane, ethyl acetate and methanol extracts of the leaf-whorls of field grown plants of sorghum cultivars IS 18363 (susceptible) and IS 2205 {LdSistant) ...
Analysing the Role of Semiochemicals in the Oviposition Substrate Choices of the Malaria Vector Mosquito Anopheles Gambiae Sensu Lato

Okal, Michael Nyang’anga (London School of Hygiene and Tropical Medicine, 2015)

The search for tools that target malaria vector that resist insecticides and bite outdoors has become a research priority. Such tools will be necessary for managing residual malaria transmission and hastening the eradication ...
Analysis of the Biology, Population Dynamics, Natural Enemies and Impact of the Groundnut Leaf Miner, Aproaerema modicella (Deventer) (I..epidoptera:Gelechiidae), on Groundnut in India

Shanover, Thomas Gibbs (university of illinois, urbana, 1989)

The groundnut leaf miner (GLM), Aproaerema modicella (Deventer)(Lepidoptera: Gelechiidae) is a serious pest of groundnut and soybean throughout South Asia . Laboratory and field experiments were conducted over a two year ...
Anopheles larval productivity and diversity in Mwea irrigation scheme, Kirinyaga district, kenya

Mwangangi, Joseph Mumo (Kenyatta University, 2006)

The use of irrigation to flood agricultural land during rice cultivation has over the years been associated with an increase in the number of disease vectors and corresponding increase in health burden due to malaria and ...
Anti-Tick Properties of Selected East African Plants against the Brown Ear Tick Rhipicephalus Appendiculatus Neuman and Identification of some of their Secondary Compounds

Bakari, Salim Kiondo Kaoneka (Moi University, 1998)

Hexane, ethyl acetate and methanol extracts of Commiphora swynertonii Burtt., Turraea cormicopia (L), T abyssinica, T. floribunda and Melia volkensii Gurke were tested for anti-tick activity against the larvae and adult ...
Aphid resistance in Cowpea (Vigna Unuiculata (L.) Walp.) and its relationships with morphological and biolchemical characters

Githiri, Stephen Mwangi (University of Nairobi, 1994)

Check on the attached pdf
Aspects Of The Life Cycle, Biological Performance And Quality Of The Black Lyre Leafroller 'Cnephasia' Jactatana (Walker)

Ochieng'-Odero, J. P. R. (Zoology University of Auckland,, 1988-09)

The thesis answers the general question of whether the quality of artificially reared insect species should be based on performance tests for intended use or whether quality should be based on a more holistic biological ...
Aspects of the Life Cycle, Biological Performance and Quality of the Black Lyre Leafroller 'Cnephasia' jactatana (Walker)

Ochieng'-Odero, J.P. (University of Auckland, 1988)

The thesis answers the general question of whether the quality of artificially reared insect species should be based on performance tests for intended use or whether quality should be based on a more holistic biological ...
Aspects Of The Mating Behaviour Of Glossina Morsitans Westwood And Gloss Ina Pallidipes Austen

Davies-Cole, John Oliver Abimbola (1998-02)

sexual receptivity was investigated in glossing morsitans orsitans and glossing pallidipes by observing successful pairings of females for specified periods of time .the duration of copulation, degree of insemination of ...
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 ...
Assessment of incidence, severity and distribution patterns of citrus greening in Kenya and Tanzania; the role of African Citrus Triozid endosymbionts in disease epidemiology

Rasowo, Brenda Amondi (Universität Bonn, 2019)

Infestation by insect pests and infection of disease causing pathogens are among the major biotic constraints hindering production, profitability and contribution of citrus to economic development. The African citrus triozid ...
Assessment of the diversity and roles of bacterial symbionts in fruit fly development and response to biological control

Gichui, Joseph (North-West University, 2019)

Tephritid fruit flies are among the most destructive pest species of fruits and vegetables in many regions of the world. Apart from high losses in yield, tephritid fruit fly pests pose great socioeconomic and ecological ...
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 ...
An assessment of the use of Botanical Extracts and Pheromones for the Off-Host and O-Host control of Amblyoma 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 Heartwater, disease in cattle. Its control has ...
Asymmetric Synthesis and some Reactions

NKUNYA, MAYUNGA HABIBU HEMEDI (University of Dar Es Salaam, 1991)

This thesis describes the asymmetric phase-transfer catalysed (PTC) Darzens condensation of aldehydes and ketones with the chiral reagents 1-menthyl chloromethanesulphonate, (S)-(-)-N-chloromethylsulphony l-2 -thoxymethy ...
Attempts on the Synthesis of the Pheromone Component Lineatin

Rwehikiza, Serry Francis (University of Oslo, 1984)

poorly achieved. Direct alkylation on the alkenal V with 8-methallylmagnesium chloride followed by oxidative cleavage of 2,5,5-trimethylocta-l,7-diene-4-ol (VIlI) and methylenation via a Wittig reaction gave an improved ...

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