Browsing Masters Degrees (Plant Pathology) by Title
Now showing items 42-61 of 71
-
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 ... -
Phenotypic, physico-chemical and genetic responses of maize associated with resistance to Fusarium verticillioides
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: Maize (Zea mays L.) is integral to the Southern African diet and is a major component of animal feed products. Fusarium verticillioides is an ubiquitous fungal pathogen that contaminates maize grain and ... -
Phosphite sensitivity of phytophthora cinnamomi and methods for quantifying phosphite from avocado roots
(Stellenbosch : Stellenbosch University, 2016-03)ENGLISH ABSTRACT: Phytophthora root rot caused by Phytophthora cinnamomi threatens the production of avocado worldwide, but the disease can be effectively managed using phosphonates. The mode of action of phosphonates is ... -
Pome fruit trees as alternative hosts of grapevine trunk disease pathogens
(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 ... -
Pythium species associated with rooibos, and the influence of management practices on disease development
(Stellenbosch : Stellenbosch University, 2012-03)ENGLISH ABSTRACT: Damping-off of rooibos (Aspalathus linearis), which is an important indigenous crop in South Africa, causes serious losses in rooibos nurseries and is caused by a complex of pathogens of which oomycetes, ... -
Quantification of apple replant pathogens from roots, and their occurrence in irrigation water and nursery trees
(Stellenbosch : Stellenbosch University, 2016-03)ENGLISH ABSTRACT: Apple replant disease (ARD), an economically important disease of apple, occurs when young apple trees are planted on soil previously cultivated to apple or closely related species. Soil is considered as ... -
Quantification of spray coverage on grape bunch parts and the incidence of Botrytis cinerea
(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 ... -
Quarantine status of selected fungal pathogens on Malus, Prunus and Vitis species
(Stellenbosch : Stellenbosch University, 2006-04)ENGLISH ABSTRACT: Invasions of alien species into non-native environments pose one of the largest, but least addressed international threats to biodiversity, both within natural ecosystems and agricultural settings. It ... -
Resistance in South African maize inbred lines to the major ear rot diseases and associated mycotoxin contamination
(Stellenbosch : Stellenbosch University, 2014-12)ENGLISH ABSTRACT: Maize (Zea mays L.) is one of the most important grain crops produced globally and serves as the primary source of carbohydrates and vitamins to millions of people in Africa. Whenever environmental ... -
Resistance to Botrytis cinerea in parts of leaves and bunches of grapevine
(Stellenbosch : Stellenbosch University, 2001-03)ENGLISH ABSTRACT: Knowledge of the presence of Botrytis cinerea in morphological parts of bunches and leaves of grapevine would help to find a reliable, sensitive, and specific assay to verify the actual occurrence of ... -
Risk assessment of the Acacia cyclops dieback pathogen, Pseudolagarobasidium acaciicola, as a mycoherbicide in the South African strandveld and limestone fynbos
(Stellenbosch : Stellenbosch University, 2014-04)ENGLISH ABSTRACT: Acacia cyclops, an invasive weed in South Africa, was initially imported to stabilize the sand dunes in the southern Cape. The spread of A. cyclops is a major threat to the fragile biodiversity of the ...
