A5040161822- Plant Pathogens and Fungal Diseases
- Forest Insect Ecology and Management
- Mycorrhizal Fungi and Plant Interactions
- Yeasts and Rust Fungi Studies
- Forest Ecology and Biodiversity Studies
- Plant and Fungal Interactions Research
- Plant Pathogens and Resistance
- Plant Disease Resistance and Genetics
- Plant Disease Management Techniques
- Plant-Microbe Interactions and Immunity
- Plant Pathogenic Bacteria Studies
- Cocoa and Sweet Potato Agronomy
- Ecology and Vegetation Dynamics Studies
- Plant Diversity and Evolution
- Insect symbiosis and bacterial influences
- Wheat and Barley Genetics and Pathology
- Lichen and fungal ecology
- Forest Management and Policy
- Forest ecology and management
- Fungal Biology and Applications
- African Botany and Ecology Studies
- Banana Cultivation and Research
- Biological Control of Invasive Species
- Nematode management and characterization studies
- Phytoplasmas and Hemiptera pathogens
University of Pretoria
2015-2024
Sappi (South Africa)
2020-2024
Forestry and Agricultural Biotechnology Institute
2003-2023
University of Limpopo
2023
Chinese Academy of Forestry
2020
Biotechnology Institute
2001-2012
Agricultural Biotechnology Institute
2001-2010
Stellenbosch University
2010
Plant (United States)
2004
University of the Free State
1995-1997
Novel species of microfungi described in the present study include following from South Africa: Cercosporella dolichandrae Dolichandra unguiscati, Seiridium podocarpi Podocarpus latifolius, Pseudocercospora parapseudarthriae Pseudarthria hookeri, Neodevriesia coryneliae Corynelia uberata on leaves Afrocarpus falcatus, Ramichloridium eucleae Euclea undulata and Stachybotrys aloeticola Aloe sp. (South Africa), as novel member Stachybotriaceae fam. nov. Several were also Zambia, these...
Novel species of fungi described in this study include those from various countries as follows:
Abstract Plantations of eucalypts (species Eucalyptus and Corymbia), particularly in the tropics Southern Hemisphere, have expanded dramatically during course last 100 years. The nature these plantations has changed substantially as selection, breeding, hybridisation, vegetative propagation other innovative techniques been introduced to improve planting stock. Although there are various examples diseases pests damaging early plantations, it is clear that separation trees from their natural...
Species of Ceratocystis are well-known wound related pathogens many tree species, including commercially planted Acacia spp. Recently, several isolates were collected from wilting A. mangium in plantations Indonesia. The aim this study was to identify these and investigate their ability cause disease on two plantation-grown using greenhouse field inoculation experiments. For identification, morphological characteristics comparisons DNA sequence data for the ITS, β-tubulin TEF 1-α gene...
One order, seven families, 28 new genera, 72 species, 13 combinations, four epitypes, and interesting host / or geographical records are introduced in this study. Pseudorobillardaceae is for
This study introduces two new families, one genus, 22 species, 10 combinations, four epitypes, and 16 interesting host / or geographical records.
An order, family and genus are validated, seven new genera, 35 species, two combinations, epitypes, lectotypes, 17 interesting host / or geographical records introduced in this study. Validated genus: Superstratomycetales Superstratomycetaceae (based on Superstratomyces ). New genera: Haudseptoria typhae ); Hogelandia lambearum Neoscirrhia osmundae Nothoanungitopsis urophyllae Nothomicrosphaeropsis welwitschiae Populomyces zwinianus Pseudoacrospermum goniomae species: Apiospora sasae dead...
Identification of fungi and the International Code Nomenclature underpinning this process, rests strongly on characterisation morphological structures. Yet, value these characters to define species in many groups has become questionable or even superfluous. This emerged as DNA-based techniques have increasingly revealed cryptic complexes. problem is vividly illustrated present study where 105 isolates Botryosphaeriales were recovered from both healthy diseased woody tissues native Acacia...
Puccinia psidii, the cause of a disease today commonly referred to as Myrtle rust, is considered high priority quarantine threat globally. It has wide host range in Myrtaceae and it feared that may result significant damage native ecosystems where these plants occur. The fungus also considerable concern plantation forestry industries propagate Australian Eucalyptus species. In May 2013, symptoms rust resembling those P. psidii were observed on an ornamental Myrtaceous shrub garden South...
Summary The aim of this study was to determine the evolutionary time line for rust fungi and date key speciation events using a molecular clock. Evidence is provided that supports contemporary view recent origin fungi, with common ancestor on flowering plant. Divergence times > 20 genera were studied Bayesian analyses. A relaxed clock applied ribosomal mitochondrial genes, calibrated against estimated divergence hosts such as Acacia (Fabaceae), angiosperms cupressophytes. Results showed...
The Botryosphaeriaceae is a species‐rich family that includes pathogens of wide variety trees, including Eucalyptus species. Symptoms typical infection by the have recently been observed in plantations South China. aim this study was to identify associated with these symptoms. Isolates were collected from branch cankers and senescent twigs different spp. All isolates resembling separated into groups based on conidial morphology. Initial identifications made using PCR‐RFLP fingerprinting,...
Novel species of fungi described in this study include those from various countries as follows:
Abstract The fungal genus Ceratocystis includes many economically important tree pathogens. Until the 1980s, this of plant pathogens was not known from non-native plantation-grown forestry species. However, during course last 20 years, a number reports have been made spp. causing death species several locations worldwide. Affected trees include both Australian Acacia and Eucalyptus first report disease caused by sp. on less than 10 years ago Central Africa and, shortly thereafter, reported...
Leaf blight caused by Calonectria spp. is an important disease occurring on Eucalyptus trees grown in plantations of Southeast Asia. Symptoms leaf have recently been observed commercial FuJian Province China. The aim this study was to identify these employing morphological characteristics, DNA sequence comparisons for the β-tubulin, histone H3 and translation elongation factor-1α gene regions sexual compatibility. Four were identified, including Ca. pauciramosa three novel taxa described...
There have been several recent reports of Pterocarpus angolensis (kiaat) trees dying in South Africa, Zambia and Zimbabwe, where this tree is used traditional medicine a valuable source timber for woodcarving furniture. A survey material from diseased P. Africa yielded isolates the Botryosphaeriaceae, an important fungal family known to cause number diseases. The aim study was identify these Botryosphaeriaceae determine their pathogenicity with branch inoculations. Seven species were...
Abstract Aims To highlight the increasing importance of pests and pathogens to Australian Acacia species, where they are planted as non‐natives in commercial plantations their native environment. Location Africa, Asia, Australia, South America. Methods Existing literature results unpublished surveys on acacias reviewed. These discussed within context a growing invasive alien insects including novel encounters host jumps. Results various parts world increasingly threatened by pathogens....
Fungi in the Botryosphaeriaceae are important plant pathogens that persist endophytically infected hosts. Lasiodiplodia theobromae is a prominent species this family infects numerous plants tropical and subtropical areas. We characterized collection of 255 isolates L. from 52 many parts world to determine global genetic structure possible origin fungus using sequence data four nuclear loci. One two dominant haplotypes emerged across all loci, none which could be associated with geography or...