icipe Digital Repository: Recent submissions

Now showing items 1981-2000 of 2010

A Biochemical Investigation of the Taxonomy of the Cassava Green Mite Mononychellus Spp. (Acari: Tetranychidae) in Kenya

Oyugi, Kenneth Kambona (Rivers State University of Science and Technology , Nkpolu , Port-Harcourt, Nigeria, 1989)

Biochemical methods have been applied to elucidate the species systematics of cassava green mite (CGM). Traditionally CGM have been classified using the length of the dorso-central setae (D1-D3 ), which groups CGM into two ...
Oviposition and Feeding Allelochemicals for Chilo Partellus from Sorghum and Maize Cultivars; Bioassay, Isolation and Characterization

Bogita, Richard Kibwage (University of Nairobi, 1994)

A study was carried out to isolate and identify the chemicals from sorghum and maize that determine the oviposition and feeding responses, respectively, of the moth and larvae of Chilo partellus a serious pest of these ...
Colonizing responses of Maruca testulalis (geyer) (Lepidoptera: pyralidae) to different cowpea cultivars in relation to their Resistance/Susceptibility

Okech, Suleman H .O (Rivers State University of Science and Technology, Port Harcourt - Nigeria, 1986-12)

A comparison of the resistance/susceptibility levels of ten cowpea cultivars to the pod borer Maruca testulalis revealed that VITA l was the most susceptible. TVU 946 most resistant and VITA 5, chola local and kamboinse ...
Factors Affecting Puparia Distribution And Mortality In A Natural Population Of Glossina Pallidipes Austen (Diptera: Glossinidae) At Nguruman, Kenya

Muange, Peter Katubbah (, Moi University, Eldoret, Kenya, 1991-07)

Glossina pallidipes Austen is an important vector of both human and animal trypanosomiasis in Kenya. In an effort to generate information that could be useful for its control, studies were carried out on its ecology to ...
Feeding Behaviour of Maruca Testulalis (Geyer) (Lepidoptera : Pyralidae) in Relation to its Host and Non-Host Plants

Charles Mugoya Francis (Rivers state university of science and technology, port Harcourt, Nigeria, 1991-06)

The host plant pods and flowers evoked higher feeding responses than the leaves among the fourth instar larvae in choice as well as no choice tests. \aV"Vo.e. First and fourth instar~did not feed on leaves of common bean ...
Modelling Productivity of Indigenous Zebu Cattle (Bos Indicus) under the natural field conditions on Rusinga Island, Kenya

Oranga Hezron (Moi University Kenya, 1996)

The general objective of this study was to develop predictive models which could be used to determine pr oductivity (liveweight gain) losses attributed to various causal factors that are specific to livestock production ...
Ecology and Management of the Leafhopper Vectors ( Cicadulina Spp.) of Maize Streak Virus

Van Rensburg, George Diederick (Department of Entomology and Nematology University of Stellenbosch, 1990)

Several Cicadulina species are important pests of maize by virtue of their role as vectors of maize streak virus (MSV). This study deals with various aspects of the vector/virus/host plant relationship. Developmental times ...
The Population Dynamics Of The Cassava Green Spider Mite, Mononychellus Tanajoa (Bondar) (Acarina: Tetranychidae) In Relation To Its Predators And Environmental Factor In Western Kenya

Ndonga, Millicent Owour (Kenyatta University, 1991)

NO ABSTRACT
Studies on Factors Affecting the Distribution and Abundance of Phlebotomine Sandflies in a Leishmaniasis Endemic Focus in Baringo District, Kenya

Basimike, Mulenda (Rivers State University of Science and Technology , Nkpolu , Port-Harcourt, 1988)

Factors affecting the distribution and abundance of Phlebotornine sandf lies were studied during the period 1985 to 1987, in the Marigat leishrnaniasis endemic area, located in Baringo district, Kenya. It was found that ...
Responses of common bean (phaseolus vulgaris l.) Cultivars to bean flies (diptera: agromyzidae)

Nderitu, John Huria (The University Of Dar-Es- Salaam, 1988)

uniform. beanfly infestation of sufficient level to which the cultivars were subjected during the growing period. However, natural populations of beanfly on beans planted in a• single planting in the late part of the ...
Biosystematic studies of the termite genus Odontotermes (Holmgren) with special reference to Kenya

Bagine, R.K .N. (Makerere University, 1986)

Odontotermes is a large and diverse genus containing some species that are pests in agriculture and forestry.Work on genus has been hampered by taxonomic difficulties. The genus has never been revised since it was erected ...
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 ...
Population Ecology of the Legume Pod Borer, Maruca Testulalis Geyer (Lepidoptera: Pyralidae) in Relation to its Natural Enemies on Cowpea in Western Kenya

Okeyo-Owour, Barack, J. (1988)

Studies were conducted at the International Centre of Insect Physiology and Ecology, Mbita Point Field Station (MPFS) fana and the Lambwe Valley fanaer's field during 1983 - 1985 , to detenaine the natural population changes ...
The Role of Predators , Parasitoids and Pathogens in Regulating Natural Populations of the Non-parasitic Stages of Rhipicephalus Appendiculatus Neumann and other Livestock Ticks, and Related Aspects of the Ticks' Ecology

Mwangi, Esther Njoki (1991)

Natural enemies of the important ticks in Kenya were studied with a view to assessing their role in regulating natural populations, and their possible use in biological control of ticks. Predators of engorged females of ...
Polymorphism and the role of hormones in caste differentiation of a higher termite species macrotermes michaeseni isoptera, macrotermitinae

Okot-Kotber, Billie Moses (University of Dijon, 1979-12)

Termites are social insects of the order Isoptera. They are predaninant in the Tropics and dwell in dry or damp wood, underground in soil or in mounds or nest in trees. The basic food source for termites are cellulose ...
The Digestive Aspartic Proteinases of the Brown Ear Tick

Vundla, Waha R.M. (UNIVERSITE DE NEUCHATEL, 1990)
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 ...
Studies on Factors Influencing the Establishment and Development of Filaria in Mosquitoes

Irungu, Lucy Wachuhi (1984)

Factors affecting the establishment and deveiliopment of Brugia and Wuchereria microfilariae in various strains of C. quinquefasciatus, C.p. molestus, An. stephensi and Ae . aaegypti SS were studied. The investigations ...
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 ...
A Study of the Sensory Biology of Labellar Gustation by the Hale Queensland Fruit Fly, Dacus Tryoni (Froggatt) (Diptera: Tephritidae) With Respect To Cue-Lure

Ng'ang'a, Peter George (1988)

Hales of the Queensland fruit fly Dacus tryoni (Froggatt) are attracted to and readily ingest 4-(pacetoxyphenyl)- 2-butanone (cue-lure). The development of responsiveness of these flies follows a sigmoid curve: almost no ...

Now showing items 1981-2000 of 2010

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