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Faculty of AgriSciences
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Department of Plant Pathology
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Masters Degrees (Plant Pathology)
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Now showing items 1-17 of 17

Biological control of the grapevine trunk disease pathogens : pruning wound protection

Kotze, Charl (Stellenbosch : Stellenbosch University, 2008-12)

In recent years, several studies have conclusively shown that numerous pathogens, including several species in the Botryosphaeriaceae, Phomopsis, Phaeoacremonium, as well as Phaeomoniella chlamydospora and Eutypa lata, ...
Characterisation and management of trunk disease-causing pathogens on table grapevines

Bester, Wilma (Stellenbosch : Stellenbosch University, 2006-04)

ENGLISH ABSTRACT: Phaeomoniella chlamydospora, Eutypa lata, Phomopsis, Phaeoacremonium, and Botryosphaeria spp. are important trunk disease pathogens that cause premature decline and dieback of grapevine. Previous research ...
Characterisation of mites and peniciccium species associated with apple core rot diseases

Van der Walt, Lene (Stellenbosch : University of Stellenbosch, 2009-03)

ENGLISH ABSTRACT: Dry core rot (DCR) and wet core rot (WCR) are among some of the most important postharvest diseases of apples in South Africa. Mouldy core (MC) is also a symptom associated with the core region of apples, ...
Characterisation of Rhizoctonia in cropping systems in the Western Cape Province

Tewoldemedhin, Yared Tesfai (Stellenbosch : University of Stellenbosch, 2005-03)

The genus Rhizoctonia includes important soilborne plant pathogens that can cause severe economic losses on a wide range of crops including cereal, canola, pasture and grain legume crops. Limited information is available ...
The characterization of the basidiomycetes and other fungi associated with esca of grapevines in South Africa

White, Chana-Lee (Stellenbosch : University of Stellenbosch, 2010-12)

ENGLISH ABSTRACT: Esca is a disease affecting grapevines and is potentially devastating as there are economic losses due to a decrease in yield, wine quality and berry quality. Vineyards also need to be replaced earlier ...
Epidemiology and control of Pseudocercospora angolensis fruit and leaf spot disease on citrus in Zimbabwe

Pretorius, Mathys Cornelius (Stellenbosch : Stellenbosch University, 2005-12)

ENGLISH ABSTRACT: Fruit and Leaf Spot Disease (FLSD) of citrus, caused by Phaeoramularia angolensis, is found only in 18 countries in Africa, the Comores Islands in the Indian Ocean and Yemen in the Arabian peninsula. ...
Epidemiology and management of Fusarium circinatum in the Western Cape Province of South Africa

Van Wyk, Schalk Jacobus Petrus (Stellenbosch : Stellenbosch University, 2011-03)

ENGLISH ABSTRACT: Pine pitch canker, caused by Fusarium circinatum, is a major constraint to the production of high quality timber in the Western Cape Province of South Africa. Under nursery conditions the pathogen causes ...
Genetic characterization and fungicide resistance profiles of Botrytis cinerea in rooibos nurseries and pear orchards in the Western Cape of South Africa

Wessels, Andries Bernardus (Stellenbosch : Stellenbosch University, 2012-03)

ENGLISH ABSTRACT: Botrytis cinerea Pers. Fr. [teleomorph Botryotinia fuckeliana (de Bary) Whetzel] causes serious losses of over 200 crops worldwide, including rooibos seedlings and pears. This pathogen is characterized ...
Imazalil and wax coating application in citrus packhouses to control green mould and preserve fruit quality

Njombolwana, Ncumisa Shelly (Stellenbosch : Stellenbosch University, 2012-03)

ENGLISH ABSTRACT: Green mould is a major citrus postharvest disease caused by a wound pathogen called Penicillium digitatum. Imazalil (IMZ) is the most important postharvest fungicide that is currently registered against ...
The inoculum ecology of Botrytis cinerea in Rooibos nurseries

Spies, Christoffel, F. J. (Christoffel Frederik Jakobus) (Stellenbosch : Stellenbosch University, 2005-04)

ENGLISH ABSTRACT: Grey mould, caused by Botrytis cinerea, is the most important foliar disease of rooibos seedlings. Although the disease is primarily controlled with applications of fungicides, the improvement of cultural ...
Molecular detection of Phaeomoniella chlamydospora in grapevine nurseries

Retief, Estianne (Stellenbosch : Stellenbosch University, 2005-04)

ENGLISH ABSTRACT: Phaeomoniella chlamydospora is the main causal organism of Petri disease, which causes severe decline and dieback of young grapevines (1-7 years old) and also predisposes the wood for infection by other ...
Mycotoxin levels in subsistence farming systems in South Africa

Ncube, Edson (Stellenbosch : Stellenbosch University, 2008-03)

ENGLISH ABSTRACT: Fusarium spp. and Aspergillus spp. are toxin-producing fungi associated with maize and groundnut. Fusarium verticillioides produces fumonisins in maize, and Aspergillus flavus produces aflatoxins in ...
Pome fruit trees as alternative hosts of grapevine trunk disease pathogens

Cloete, Mia (Stellenbosch : University of Stellenbosch, 2010-03)

ENGLISH ABSTRACT: A survey was undertaken on apple and pear trees in the Western Cape Province to determine the aetiology of trunk diseases with reference to trunk diseases occurring on grapevine. Grapevine trunk diseases ...
Population structure of Phytophthora infestans in selected central, Eastern and Southern African countries

Pule, Boitumelo Bronwen (Stellenbosch : Stellenbosch University, 2010-12)

ENGLISH ABSTRACT: Late blight caused by Phytophthora infestans on potato and tomato causes major economic losses worldwide. Until the 1980s, P. infestans populations outside its centre of origin (either central Mexico ...
Quantification of spray coverage on grape bunch parts and the incidence of Botrytis cinerea

Brink, Jan-Cor (Johannes Cornelius) (Stellenbosch : Stellenbosch University, 2005-04)

ENGLISH ABSTRACT: Various studies revealed that Botrytis cinerea, the causal pathogen of Botrytis bunch rot, is mostly associated with pedicels, rachises, laterals and berry bases, and not with berry skins as previously ...
The role of arthropods in the dispersal of trunk disease pathogens associated with Petri disease and Esca

Moyo, Providence (Stellenbosch : Stellenbosch University, 2013-03)

ENGLISH ABSTRACT: Petri disease and esca are devastating grapevine trunk diseases and compromise the sustainability of viticulture world-wide. Despite being extensively studied, knowledge of inoculum sources and mechanisms ...
The use of adjuvants to improve fungicide spray deposition on grapevine foliage

Van Zyl, Sybrand Abraham (Stellenbosch : Stellenbosch University, 2009-03)

ENGLISH ABSTRACT: Sufficient fungicide deposition on the target site is an essential requirement for effective chemical management of fruit- and foliar diseases such as grey mould of grapevines. Control failure is often ...