Browsing Masters Degrees (Plant Pathology) by Title
Now showing items 32-51 of 71
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Identification of differentially expressed mRNA species in Vitis vinifera in reaction to infection by Uncinula necator
(Stellenbosch : Stellenbosch University, 1999-12)ENGLISH SUMMARY: Powdery mildew is one of the most important grapevine diseases and is a problem in all the grapevine producing areas. Losses caused by uncontrolled powdery mildew force producers to follow extensive ... -
The implementation and validation of reduced volume argrochemical applications in the south African citrus industry using novel technology
(Stellenbosch : Stellenbosch University, 2019-03)ENGLISH ABSTRACT: The South Africa citrus industry is the third largest exporter in the world and is considered one of the most important horticultural crops due to high economic export value. However, citrus trees ... -
Incidence and epidemiology of apple core rot in the Western Cape of South Africa
(Stellenbosch : Stellenbosch University, 2012-12)ENGLISH ABSTRACT: This study looked at the incidence, etiology and epidemiology of core rot of apples in orchards situated in the Western Cape, South Africa. Core rot is a post-harvest disease, with three symptoms, namely ... -
Infection by dry, airborne Botrytis cinerea conidia and fungicide efficacy on different parts of grape bunches and vinelets
(Stellenbosch : Stellenbosch University, 2002-03)ENGLISH ABSTRACT: The evaluation of fungicide efficacy in commercial vineyards can be influenced by the sporadic occurrence of Botrytis cinerea at various positions on vines, differences in bunch structure during bunch ... -
Infection pathways of Botrytis cinerea on selected wine grape cultivars
(Stellenbosch : Stellenbosch University, 2002-12)ENGLISH ABSTRACT: An understanding of the infection pathways of Botrytis cinerea in grape bunches will help to combat this devastating pathogen of grape. Many studies have been done to determine the possible infection ... -
The influence of chemical seed treatment on germination, seedling survival and yield of canola
(Stellenbosch : Stellenbosch University, 2004-12)ENGLISH ABSTRACT: The influence of chemical seed treatments on the germination, seedling survival and yield of canola (cv. Varola 44) was investigated in a series of incubation studies, glasshouse experiments, as well ... -
The influence of light intensity, light quality and root zone temperature on patato minituber production
(Stellenbosch : Stellenbosch University, 2007-12)ENGLISH ABSTRACT: In South Africa the production of minitubers, as starting material for seed potato production, is achieved by transplanting in vitro plantlets to a hydroponic growth medium in the greenhouse, but current ... -
The inoculum ecology of Botrytis cinerea in Rooibos nurseries
(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 ... -
An investigation of soilborne fungi associated with roots and crowns of nursery grapevines
(Stellenbosch : Stellenbosch University, 2004-03)ENGLISH ABSTRACT: Soilborne diseases of grapevines represent a complex problem with limited information available, both locally and internationally. Previous research in South Africa indicated that Phytophthora and ... -
Investigation of Trichoderma species colonization of nursery grapevines from improved management of black foot
(Stellenbosch : Stellenbosch University, 2019-03)ENGLISH ABSTRACT: Black foot disease (BFD) is one of the main fungal diseases associated with young grapevine decline. In recent years its incidence and severity has increased significantly, affecting both nurseries and ... -
Leaf area changes and transpiration in vineyards under salt stress
(Stellenbosch : Stellenbosch University, 1999-12)ENGLISH SUMMARY: Irrigation of vines with saline water has long been a problem in the Western Cape region. Research in this respect financed by the Water Research Commission was done on vines to test the effect of 6 ... -
Mancozeb rainfastness and residue thresholds for control of Venturia inaequalis
(Stellenbosch : Stellenbosch University, 2016-03)ENGLISH SUMMARY: An important apple disease world-wide is Venturia inaequalis that causes scab-like lesions on fruit and defoliation of trees. In South Africa, the disease is mainly managed through fungicide sprays that ... -
Molecular detection of Phaeomoniella chlamydospora in grapevine nurseries
(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 ... -
Monitoring fusarium, gibberella and diplodia ear rots and associated mycotoxins in maize grown under different cropping systems
(Stellenbosch : Stellenbosch University, 2017-03)ENGLISH SUMMARY: Maize ear rots represent a significant problem in most maize production areas resulting in reduced yield and quality due to visible fungal infection and mycotoxin contamination of maize grain. Mycotoxigenic ... -
Mycotoxin contamination of maize and groundnut produced by subsistence farmers in northern KwaZulu-Natal
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Subsistence farmers in South Africa face many production challenges including infection of their grain crops with mycotoxigenic fungi and concomitant mycotoxin contamination. Fusarium spp. and Aspergillus ... -
Mycotoxin levels in subsistence farming systems in South Africa
(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 ... -
Occurence of canker and woodrot pathogens in young apple trees and possible sources of inoculum
(Stellenbosch : Stellenbosch University, 2017-03)ENGLISH ABSTRACT: Apples are one of the most important deciduous fruit crops cultivated in South Africa. The deciduous fruit industry identified a higher occurrence of young apple trees that died due to canker or wood rot ... -
Occurrence of canker and wood rot pathogens on stone fruit propagation material and young stone fruit trees
(Stellenbosch : Stellenbosch University, 2019-03)ENGLISH ABSTRACT: The phytosanitary status of stone fruit propagation material and nursery trees in South Africa are not known. Canker and wood rot pathogens can be present in visibly clean material. Due to stress and ... -
Optimisation of postharvest drench application of fungicides on citrus fruit
(Stellenbosch : Stellenbosch University, 2016-03)ENGLISH ABSTRACT: South Africa is the 2nd largest exporter of fresh citrus, after Spain, worldwide. Delays to the packline, i.e. degreening, can result in substantial postharvest decay such as green mould caused by Penicillium ... -
Pathogens associated with diseases of Protea, Leucospermum and Leucadendron spp.
(Stellenbosch : Stellenbosch University, 1999-12)ENGLISH SUMMARY: The manuscript consists of six chapters that represent research on different diseases and records of new diseases of the Proteaceae world-wide. The fungal descriptions presented in this thesis are not ...
