Research Papers/Topics in Pathology

Tomato Post-Harvest Spoilage, Causes And Use Of Selected Botanical Extracts In Their Management In Mwea, Kirinyaga County

ABSTRACT Tomato is an important vegetable crop in Kenya. It is widely grown for home consumption and for sale. The demand for fresh tomato is high both for domestic use and markets. However, tomato post-harvest losses are a threat to the harvested tomatoes. There is no well documented current knowledge on the nature and status of post harvest losses on tomato in Kenya particularly with regard to pests and diseases. In areas where post-harvest losses have been documented the figures vary...

Occurrence Of Plant Parasitic Nematodes In Commercial Pineapple Fields And Effect Of Biocontrol Agents On Meloidogyne Species In Kenya.

ABSTRACTPlant-parasitic nematodes, in particular Meloidogyne spp., cause significant yield reduction in commercial pineapple (Ananas comosus) worldwide. In Kenya limited studies have been conducted on nematodes in pineapple although the main commercial producer in Kenya has sole mandate to use Telone II (1, 3-Dichloropropene) indicating the seriousness of the problem. The current study was conducted to provide an update on the occurrence of plant-parasitic nematodes in commercial pineapple fa...

Effectiveness Of Antagonistic Bacterial Isolates Against Crown Gall Disease On Roses In Kiambu County, Kenya

ABSTRACTCrown gall is one of the major constraint in rose flower production in Kenya. The study aimed at developing a bacterial based biopesticide to manage crown gall disease on roses. A baseline survey on status of crown gall disease was conducted from July to October, 2017 using a questionnaire administered to the production managers in randomly selected flower farms in Kiambu, Nakuru and Laikipia Counties. Pathogen and the biocontrol isolates were isolated from galls and soil samples, res...

Effect Of Selected Endophytic Fungi And Resistant Tomato Cultivars On Meloidogyne Spp. In The Coastal Region, Kenya

ABSTRACTTomato production in Kenya, especially in the coastal region has remained low due to pests and diseases attack especially Meloidogyne spp. (root-knot nematodes) which is a serious threat. A study was therefore conducted in the coastal region of Kenya with the aim of sourcing for endophytic fungi (EF) which could be used alongside moderately resistant tomato cultivars to manage Meloidogyne spp. Pathogenecity test of these isolates was carried out in the screenhouse using cv. Cal J. In ...

Effect Of Using Trichoderma Asperellum A Biocontrol Agent Aganist Root Knot Nematodes On Nodulation, Galling And Growth Parameters Of French Beans In Kenya

ABSRACT Trichoderma species have been widely reported worldwide as biocontrol agents of plant pathogens and growth promoters. Trichoderma asperellum has been fronted as a biocontrol agent of root-knot nematodes on tomato and French beans in Kenya. However research on the effect of T. asperellum on nodulation particularly in French beans is still lacking. Therefore there is a need to determine the effect of Trichoderma spp. on nodulation. A negative effect could counter the positive effect sin...

Incidence, Prevalence And Management Of Root-Knot Nematodes (Meloidogyne Spp.) On Selected Indigenous Leafy Vegetables In Kisii And Trans-Mara Counties, Kenya

ABSTRACTSolanum nigrum L., Cleome gynandra L. and Amaranthus spp. are some of the indigenous leafy vegetables (ILVs) that contribute to food diet, income generation, good nutrition and health to resource-poor farmers in Kisii and Trans-Mara counties. The production of ILVs is constrained by inadequate land, diseases and pests of which, root-knot nematodes (RKN) are the most damaging pests to vegetable crops causing about 30 % yield losses globally. However, there is no information about the i...

Incidence Of Fusarium Species And Levels Of Fumonisin B1 In Sorghum And Finger Millet In Western Kenya

ABSTRACT. This study was carried out to determine the incidences of Fusarium species, fumonisin B1 and aflatoxin B1 production in sorghum and finger millet grains collected from selected districts of Western Kenya region. The grains were collected randomly from five locations per district in Nyamira, Kakamega, Busia and Teso districts respectively. Ten farmers per location were randomly selected and samples of 0.25 kg of grains were picked per variety. A total of 16 sorghum varietie...

Screening Selected Common Bean Genotypes For Resistance To Xanthomonas Axonopodis Pv. Phaseoli Constraining Bean Production In Kakamega County, Kenya

ABSTRACTBeans play a significant role in food security owing to its nutritional value and generation of income. However, output of beans in Western Kenya is hindered by diseases, pests, soil infertility and unfavorable weather resulting to low productivity. Of the many diseases of beans, common bacterial blight (CBB) caused by Xanthomonas axonopodis pv. phaseoli (Xap) is a disease of economic importance in common beans (Phaseolus vulgaris L.). Due to the fact that che...

Molecular Characterization And Non-Chemical Management Of Root-Knot Nematodes (Meloidogyne Spp.) On African Nightshades In Selected Parts Of Kenya

ABSTRACTRoot-knot nematodes (RKN) (Meloidogyne spp.) cause up to 80 % yield losses in infected vegetables. A study was carried out to; assess the influence of farmers’ knowledge and awareness on RKN damage on African nightshades (AFNS); assess the incidence and severity of RKN on AFNS; characterize the RKN species infecting AFNS; screen the AFNS for response to RKN and determine the efficacy of solarizing soils amended with selected organic materials against RKN. A root-knot nematode survey...

Plant Parasitic Nematodes Associated With Cabbage In Different Agro-Ecological Zones In Nyandarua And Embu Counties, Kenya

ABSTRACTCabbage (Brassica oleracea L. Var. capitata) is an important vegetable crop inKenya. It is widely used as human food and animal feed. Owing to findingsthat cabbage is a poor host to root knot nematode (RKN), this crop has beenincorporated in plant parasitic nematode (PPN) management as a rotation crop.As a result very little has been done to study nematodes associated with thiscrop, yet there are reports of nematodes infecting it. A survey was thereforeconducted in Nyandarua a...

Management Of Crown Gall Disease In Selected Rosa Hybrida Farms In Kenya Using Artemisia Annua Leaves And Zingiber Officinale Rhizome Extracts

ABSTRACTRose flower is the world’s most traded cut-flower with 74% of it coming fromKenya. Kenya has potential for higher rose production if challenges of pests anddiseases are dealt with. Pests like spidermites, false codling moth, caterpillars,aphids, thrips, nematodes and diseases such as crown gall, downy mildew, powderymildew and botrytis highly compromise production. Crown gall disease, caused byAgrobacterium tumefaciens is the most problematic disease of roses in Kenya andcaus...

FRM 512 (Forest Protection and Conservation): Tree Diseases Affecting Forest Tree Species

Ten Tree diseases affecting forest tree speciesA) Common name: Root rot diseaseBotanical name: Cochliobolus sativus.Literature review: Root rot disease is a disease that attacks the roots of trees growing in wet or damp soil. Prolonged exposure to excess water causes waterlogging, which interferes with aeration of the roots, leading to low oxygenation and decay.Causative Agent: Phytophthora spp. Particularly species P.cinnamomi. Others include Pythium, Rhizoctonia and Fusarium.....B) Common n...

IMMUNOPATHOLOGY OF AMOEBIASIS IN IBADAN

SUMMARY Amoebiasis exemplifies a disease of protean manifestations which presents many perplexing problems. In this thesis an attempt is made to define a number of the wide variations which have been observed in the pathological manifestations of the disease. The work consists of both retrospective and prospective Studies. The retrospective study involved a review of the 7922 protocols of the autopsies at the University College Hospital, Ibadan, during the ten year period 1958 to 196...

Psychopathology and Coping in Recently Diagnosed HIV/AIDS Patients- the Role of Gender

Background Although there is growing literature on the psychological responses to and the psychopathology associated with HIV I AIDS, few investigations have focused on the role of gender. This study compared psychiatric morbidity, coping responses, and disability in male and female outpatients recently diagnosed with HIV I AIDS. Method: One hundred and forty-nine patients (44 male, 105 female) with HIV I AIDS (mean ± standard deviation (SD) months since diagnosis 5.8 ± 4.1) attending...

Transcriptomic Signatures Of Recurrent Tuberculosis Disease And Treatment Response In Hiv-Infected Individuals

Table of Contents!Declaration!............................................................................................................................................................!I!!Acknowledgements!.......................................................................................................................................!III!!Summary!................................................................................................................................................


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