Browsing Faculty of Science & Technology (FST) by Author "Kaaya, GP"
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Achieving sustainable food production in Africa: Roles of pesticides and biological control agents in integrated pest management
Kaaya, GP (University of Nairobi.School of Biological Sciences, 1994-04)Food production in Africa is declining, while her population is increasing rapidly. Some factors responsible for low food productivity are mentioned; special attention is given to the problem of agricultural pests. The ... -
Assessment of antibiotic potentials of insect antibacterial factors
Kaaya, GP (University of Nairobi.School of Biological Sciences, 1989-06)Immune haemolymphs from the giant silkmoth, Hyalophora cecropia and, to a lesser extent, from the tsetse, Glossina morsitans morsitans possess antibacterial activities against several species of bacteria known to be ... -
Bulletin of animal Health and production in Africa
Kaaya, GP (University of Nairobi.school of Biological Sciences, 1977) -
Cellular And Humoral Defenses Of Glossina (diptera: Glossinidae): Reactions Against Bacteria, Trypanosomes, And Experimental Implants
Kaaya, GP; Ratcliffe, NA; Alemu, P (Uniiversity of Nairobi.School of Biological Sciences, 1986-01)Bacillus cereus was more pathogenic than Escherichia coli to Glossina morsitans morsitans (Diptera: Glossinidae) when injected into the hemocoel. Bacteria were phagocytosed by individual hemocytes, and small hemocyte clumps ... -
Characterization of Amblyomma variegatum tick saliva and salivary gland antigens inducing anti-tick immunity in Boran cattle
Dossa, SC; Essuman, S; Kaaya, GP (University of Nairobi.school of Biological Sciences, 1998)The sequence of proteins synthesized during the feeding of Amblyomma variegatum and humoral resistance acquired by Boran cattle when exposed to A. variegatum infestations were studied. Resistance was induced by repeatedly ... -
Development of bovine hemopoietic culture systems in vitro and their application in bovine trypanosomiasis
Kaaya, GP (School of computing and informatics, 1979) -
Fecundity and survival of tsetse maintained on immunized rabbits
Alemu, Patrick; Kaaya, GP (University of Nairobi.Department of Biochemistry, 1982-09)Female Glossina morsitans morsitans maintained on rabbits previously immunized with whole tsetse body (WTB), engorged tsetse guts (ETG) or gravid tsetse uteri (GTU) for three successive generations showed no increase in ... -
Haemocytes of Glossina—I. Morphological classification and the pattern of change with age of the flies
Kaaya, GP; Otieno, LH (University of Nairobi.School of Biological Sciences, 1981)Three morphological classes of haemocytes (prohaemocytes, plasmatocytes and granulocytes) were observed in the haemolymph of Glossina morsitans morsitans and G. pallidipes. In addition to the three types, a category of ... -
Horizontal transmission of mycotic infection in adult tsetse,Glossina morsitans morsitans
Okech, MA; Kaaya, GP (University of Nairobi.school of biological sciences, 1990)AdultGlossina morsitans morsitans exposed to wet conidia ofBeauveria bassiana andMetarhizium anisopliae suffered high mortalities ranging from 90 to 100% by 2 weeks post-exposure. Infected ♂ ♂ maintained in the same cages ... -
Infection of Amblyomma variegatum with a hymenopteran parasitoid in the laboratory and some aspects of its basi biology
Mwangi, JW; Kaaya, GP; Kimondo, MG (University of Nairobi.school of Biological Sciences, 1984) -
Lectins in the brown ear tick, Rhipicephalus appendiculatus: detection and partial characterization
Sebitosi, Esther N.K.; Kaaya, GP; Young, Allan S; Agbede, Rolland I.S (University of Nairobi.School of Biological Sciences, 1998)Lectins (agglutinins) were detected and isolated from the hemolymph and gut of Rhipicephalus appendiculatus, the vector of Theileria parva, using various vertebrate red blood cells (RBC). Although the hemolymph lectin ... -
Microorganisms associated with tsetse in nature: Preliminary results on isolation, identification and pathogenicity
Kaaya, GP; Okech, Matilda A. (University of Nairobi.School of Biological Sciences, 1990-06)Six genera of bacteria: Serratia, Providencia, Enterobacter, Aeromonas, Cedecea and Bacillus were isolated from field-collected G. pallidipes. Four genera: Serratia, Providencia, Enterobacter and Aeromonas were isolated ... -
Mortalities induced by entomopathogenic fungus
Hedimbi, Marius; Kaaya, GP; Chinsembu, Kazhila C (University of Nairobi.School of Biological Sciences, 2011-05)The objective of this study was to compare the infectivity of Metarhizium anisopliae at a concentration of 1 × 108 conidia/ml to developmental stages of Amblyomma variegatum, Rhipicephalus appendiculatus and Rhipicephalus ... -
Mortality and pathology in tsetse flies (Glossina spp.) treated with Neem extracts
Kaaya, GP (University of Nairobi.school of Biological Sciences, 1996) -
Natural and experimental infection of Rhipicephalus appendiculatus with pathogens and their potential for control of ticks
Mwangi, JW; Kaaya, GP; Essuman, S (University of Nairobi.school of Biological Sciences, 1995) -
Parasitism of Amblyomma variegatum by a Hymenopteran Parasitoid in the Laboratory, and Some Aspects of Its Basic Biology
Mwangi, EN; Kaaya, GP; Essuman, S; Kimondo, MG (University of Nairobi.School of Biological Sciences, 1994-06)Unfed Amblyomma variegatum F. nymphs were experimentally infected in the laboratory with a hymenopteran parasitoid, Ixodiphagus hookeri (Howard). The parasitoid was originally obtained from ticks collected from cattle in ... -
Pathogenicity of Beauveria bassiana, Metarhizium anisopliae and Serratia marcescens to the banana weevil Cosmopolites sordidus
Kaaya, GP; Seshu‐Reddya, KV; Kokwaro, ED; Munyinyia, DM (Uniiversity of Nairobi.School of Biological Sciences, 1993)Two exotic fungal isolates, one of Beauveria bassiana (268–86) and another of Metarhizium anisopliae (100–82), three local isolates of B. bassiana (isolates I, II, III) and one of the entomogenous bacteria Serratia marcescens, ... -
Prospects for biological control of livestock ticks, Rhipicephalus appendiculatus and Amblyomma variegatum, using the entomogenous fungi Beauveria bassiana and Metarhizium anisopliae
Kaaya, GP; Mwangi, EN; Ouna, EA (University of Nairobi.School of Biological Sciences, 1996-01)Both Beauveria bassiana and Metarhizium anisopliae induced approximately 30% mortalities in adult Rhipicephalus appendiculatus feeding on rabbits while M. anisopliae induced a mortality of 37% in adult Amblyomma variegatum. ... -
Protection of Metarhizium anisopliae conidia from ultra-violet radiation and their pathogenicity to Rhipicephalus evertsi evertsi ticks
Hedimbi, M; Kaaya, GP; Singh, S; Chimwamurombe, PM; Gindin, G; Glazer, I; Samish, M (University of Nairobi.School of Biological Sciences, 2009)Metarhizium anisopliae conidia were formulated in water or in olive oil containing 3% commercial sunscreens (Everysun® or E45 Sun Block 50®) and exposed to an artificial UV source for up to 5 hours. Survival of conidia ... -
Soil ingestion, nutrition and the seasonality of anthrax in herbivores of Etosha National Park
Turner, Wendy C; Imologhome, Peace; Havarua, Zepee; Kaaya, GP; Mpune, John K E; Mpopu, Irven D T; Getz, Wayne M (school of biological sciences, 2013-01)Anthrax, caused by the bacterium Bacillus anthracis, is a seasonally occurring infectious disease affecting primarily herbivorous wildlife and livestock. The seasonality of anthrax outbreaks varies among locations, making ...