Browsing Doctoral Degrees (Plant Pathology) by Type "Thesis"
Now showing items 1-20 of 45
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Application of transmissible agents to control citrus tree size.
(1997)Establishing citrus orchards at higher densities has become standard practice in South Africa. These plantings make more efficient use of inputs such as land, fertilizer, irrigation and spraying, and they are capable of ... -
Aspects of post-harvest seed physiology and cryopreservation of the germplasm of three medicinal plants indigenous to Kenya and South Africa.
(2002)The current state of global biodiversity is one of sustained and increasing decline especially in developing countries such as South Africa, where, medicinal plants face a particular threat due the herbal medicine trade, ... -
Biological and molecular characterization of South African bacteriophages infective against Staphylococcus aureus subsp. aureus Rosenbach 1884, casual agent of bovine mastitis.
(2012)Bacteriophage therapy has been exploited for the control of bacterial diseases in fauna, flora and humans. However, the advent of antibiotic therapy lead to a cessation of most phage research. Recently, the problem of ... -
Biological control and plant growth promotion by selected trichoderma and Bacillus species.
(2005)Various Trichoderma and Bacillus spp. have been documented as being antagonistic to a wide range of soilborne plant pathogens, as well as being plant growth stimulants. Successes in biological control and plant growth ... -
Biological control of the common house fly (Musa domestica L.) using Bacillus thuringiensis (Ishiwata) berliner var. Israelensis and Beauveria bassiana (Bals.) vullemin in caged poultry facilities.
(2008)The entomopathogenic fungus Beauveria bassiana and the bacterium Bacillus thuringiensis var. israelensis (Bti) have been widely studied for their role in biocontrol against many arthropods and extensively exploited for ... -
Biological control of the two-spotted spider mite, Tetranychus urticae Koch (Acari : tetranychidae).
(2009)The two-spotted spider mite (TSM), Tetranychus urticae Koch, is an important pest of many greenhouse and field crops worldwide. The development of resistance in TSM populations to chemical acaricides, allied with public ... -
Biological control of three grain storage pests: maize weevil, Sitophilus zeamais (Motschulsky), almond moth, Ephestia cautella (Walker) and cigarette beetle, Lasioderma serricorne (Fabricius), using novel strains of Beauveria bassiana (Balsamo) Vuillemin in powder formulation.
(2017)Abstract available in PDF file. -
Bioremediation of arsenic contaminated groundwater.
(2008)Sulphate-reducing bacteria (SRB) mediate the reduction of metals/metalloids directly or indirectly. Bioremediation of arsenic contaminated water could be a cost-effective process provided a cheap carbon source is used. To ... -
The characterisation of turkey rhinotracheitis virus from chickens and the development of a suitable vaccine.
(1994)Three turkey rhinotracheitis virus-like (TRTV-like) isolates were isolated from chickens with swollen heads. All grew well via the yolk sac (y/s) , chorioallantoic membrane (CAM), tracheal organ culture (TOC) , chicken ... -
Development of a new entomopathogenic nematode species, steinernema innovation : biological characterization and mass production.
(2014)Entomopathogenic nematodes belonging to the genera Steinernema and Heterorhabditis are employed as environmental friendly biopesticides to control key pests in high value agricultural crops. Their successful application ... -
The development of transgenic sweet potato (Ipomoea batatas L.) with broad virus resistance in South Africa.
(2013)Sweet potato (Ipomoea batatas Lam.) is ranked as the seventh most important food crop in the world and its large biomass and nutrient production give it a unique role in famine relief. However, multiple virus infection is ... -
The effects of Trichoderma (Eco-T) on biotic and abiotic interactions in hydroponic systems.
(2003)The following body of research provides a detailed overview of the interactive effects of biocontrol agents and environmental factors and how these influence both the host plant and pathogen populations within hydroponic ... -
An epidemiological analysis of the Phytophthora and Alternaria blight pathosystem in the Natal Midlands.
(1980)The history of the development in Natal of a forecasting service to warn of outbreaks of late blight disease caused by Phytophthora infestans is presented. The late blight pathogen and Alternaria solani, the causal ... -
The epidemiology and control of Leptosphaeria maculans cause of Crucifer Blackleg, in KwaZulu-Natal.
(1996)The perfect stage of Leptosphaeria maculans is reported for the first time in South Africa. Viable pseudothecia and pycnidia were found on dead, weathered tissue, sometimes in close association, whereas only pycnidia ... -
Epidemiology and management of grey leaf spot : a new disease of maize in South Africa.
(1996)Grey leaf spot is a relatively new fungal disease of maize in South Africa. It has become well established in the province of KwaZulu-Natal, and is capable of reducing grain yields by 20 to 60%. The disease is spreading ... -
Ethnopharmacological study on plants used for skincare and beauty by some Xhosa communities.
(2018)The paraphrase “beauty lies in the eyes of the beholder” by Plato, a Greek philosopher, has echoed through the fabrics of time and still echoes in our generation. The statement simply ought to refer to that the observer ... -
Evaluation of diazotrophic bacteria as biofertilizers.
(2013)Inoculation with diazotrophic bacteria is well documented as a means to enhance growth and increase yields of various crops, especially when used as an alternative or a supplement to the use of nitrogenous fertilizers and ... -
Genetic diversity of Oryza species in Niger ; screening and breeding for resistance to rice yellow mottle virus (RYMV)
(2012)Rice is a staple food in many West African countries, including Niger. However, both regional and national rice production have failed to meet demand due to several constraints, among which is the Rice yellow mottle virus ... -
Genetic effects and associations between grain yield potential, stress tolerance and yield stability in southern African maize (Zea mays L.) base germplasm.
(2005)Maize (Zea mays L.) is the principal crop of Southern Africa but production is threatened by gray leaf spot (Cercospora zea-maydis L.) and phaeosphaeria leaf spot (Phaeosphaeria maydis L.) diseases, drought and the use of ... -
A genetic study of resistance to African Rice Gall Midge in West African rice cultivars.
(2012)The African Rice Gall Midge (AfRGM), Orseolia oryzivora Harris and Gagné (Diptera: Cecidomyiidae), is an endemic rice pest found throughout Africa. The failure of most other control methods imposes the need to use crop ...