Search
Search results for
We found
16 results for you
-
The role of insect damage in the colonization of groundnut (Arachis hypogaea L.) pods by fungi
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. van Eeden --- , Republic of South Africa J. B.J van Flensburg --- Summer Grain Centre, Republic of South Africa T. C. de K. van der Linde --- Department of Zoology and Entomology, Republic of South AfricaThe incidence of fungal infection in insect-damaged and healthy pods and the resultant colonization of kernels was determined from commercial fields at four localities over a period of two seasons. Based on number of colonies per 100 plates, the order... -
Post establishment survival of Pinus patula in Mpumalanga, one year after planting
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: J. W. CrousRecent evidence indicated that the pathogen Fusarium circinatum might be contributing significantly to post-planting mortality. Consequently, sixteen experimental sample plots, widely distributed over many localities in Mpumalanga, were established over two growing seasons to quantify the extent of pest and... -
Fungi associated with Eichhornia crassipes in South Africa and their pathogenicity under controlled conditions
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: P Ray --- Department of Zoology and Entomology, South Africa MP Hill --- Department of Zoology and Entomology, South AfricaEichhornia crassipes Mart. Solms-Laubach (Pontederiaceae), water hyacinth, continues to be the world's worst aquatic weed. In South Africa, considerable research has been conducted on biological control agents associated with water hyacinth, with the release of six arthropods and one fungus,... -
Effect of ectomycorrhizal fungi in the protection of Uapaca kirkiana seedlings against root pathogens in Zimbabwe
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: K Ramachela --- Department of Forest and Wood Science, South Africa JM Theron --- Department of Forest and Wood Science, South AfricaInvestigations carried out on the use of ectomycorhhizal fungi in the management of Uapaca kirkiana root diseases caused by three pathogens (Rhizoctonia solani, Phytophthora parasitica and Pseudomonas solani) revealed that different mycorrhizal fungi vary in their ability to protect roots... -
Pruning quality affects infection of Acacia mangium and A. crassicarpa by Ceratocystis acaciivora and Lasiodiplodia theobromae
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: M Tarigan --- Department of Microbiology and Plant Pathology, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South Africa MJ Wingfield --- Department of Microbiology and Plant Pathology, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South Africa M van Wyk --- Department of Genetics, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South Africa B Tjahjono --- , Indonesia J Roux --- Department of Microbiology and Plant Pathology, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South AfricaPruning (singling) is a common silvicultural practice in commercial Acacia plantations because these trees tend to have multiple stems. The wounds resulting from pruning are susceptible to infection by pathogens. Ceratocystis acaciivora and Lasiodiplodia theobromae have been shown recently to... -
Global forest research, science education and community service positively impacted by a unique Centre of Excellence in Tree Health Biotechnology
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: EmmaT Steenkamp --- Department of Microbiology and Plant Pathology, DST–NRF Centre of Excellence in Tree Health Biotechnology, South Africa MichaelJ Wingfield --- Department of Microbiology and Plant Pathology, DST–NRF Centre of Excellence in Tree Health Biotechnology, South AfricaDespite their importance in ecosystems and biodiversity, very little is known about the health of trees in the native environments of South Africa. The vision and primary goal of the Centre of Excellence in Tree Health Biotechnology (CTHB) is therefore... -
Ceratocystis species: emerging pathogens of non-native plantation Eucalyptus and Acacia species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: J Roux MJ WingfieldThe fungal genus Ceratocystis includes many economically important tree pathogens. Until the 1980s, this genus of plant pathogens was not known from non-native plantation-grown forestry species. However, during the course of the last 20 years, a number of reports have... -
Health and nutrition of plantation eucalypts in Asia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: B Dell G Hardy T BurgessUnderstanding site fertility constraints has lifted productivity of eucalypt plantations in East and South-east Asia through targeted application of inorganic fertilisers. Whilst most attention has been given to the supply of nitrogen and phosphorus in silvicultural prescriptions, and inoculation with... -
Eucalypt pests and diseases: growing threats to plantation productivity
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MJ Wingfield B Slippers BP Hurley TA Coutinho BD Wingfield J RouxPlantations of eucalypts (species of Eucalyptus and Corymbia), particularly in the tropics and Southern Hemisphere, have expanded dramatically during the course of the last 100 years. The nature of these plantations has changed substantially as selection, breeding, hybridisation, vegetative propagation... -
Epidemiology of cystic fibrosis respiratory pathogens isolated at a South African Hospital, 2006–2010
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Vindana Chibabhai --- National Health Laboratory Service (NHLS), Department of Clinical Microbiology and Infectious Diseases, South Africa Warren Lowman --- Department of Clinical Microbiology and Infectious Diseases, South AfricaBackground: The epidemiology of cystic fibrosis (CF) associated pathogens other than Pseudomonas aeruginosa in the South African cystic fibrosis population has not been previously described. -
Fungi and insects associated with Euphorbia ingens die-off in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Johannes A van der Linde --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), Faculty of Natural and Agricultural Sciences (NAS), South Africa Diana L Six --- College of Forestry and Conservation, Department of Ecosystem and Conservation Sciences, USA Michael J Wingfield --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), Faculty of Natural and Agricultural Sciences (NAS), South Africa Jolanda Roux --- Department of Plant and Soil Sciences, FABI, NAS, South AfricaEuphorbia ingens, landmark succulent trees in savannas of South Africa, have been dying in large numbers over the last 10–15 years. Initial studies conducted in the Limpopo province of South Africa revealed a diverse group of biotic agents including fungi,... -
Remote sensing of forest health and vitality: a South African perspective
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sifiso Xulu --- School of Agricultural, Earth and Environmental Sciences, South Africa Michael T Gebreslasie --- School of Agricultural, Earth and Environmental Sciences, South Africa Kabir Y Peerbhay --- School of Agricultural, Earth and Environmental Sciences, South AfricaCommercial forestry plantations are an important and valuable segment of the South African economy and forest managers are required to maximise and sustain forest productivity. However, various factors such as the outbreak of damaging agents are constantly hampering forest health... -
Fungal genomes enhance our understanding of the pathogens affecting trees cultivated in Southern Hemisphere plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MPA Coetzee --- , South Africa QC Santana --- , South Africa ET Steenkamp --- , South Africa BD Wingfield --- , South Africa MJ Wingfield --- , South AfricaForest pathogens are a major cause of forest disturbances and they have a significant economic impact on commercial forestry. Genomics is an important technology now available for studies concerning tree health, enabling researchers to better understand pathosystems and potentially to... -
Seasonal variation in water quality, plankton diversity and microbial load of tropical freshwater lakes in Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Ihuoma N Anyanwu --- , Nigeria Confidence A Ezema --- , Nigeria Sowechi Ebi --- , Nigeria Chinyere A Nwajiuba --- , Nigeria Okoro Nworie --- , Nigeria Chioma O Anorue --- , NigeriaSeasonal changes significantly affect tropical ecosystems; hence, verification of how these changes affect water quality is important for waterbodies that serve as water and food sources, particular as such changes are often associated with shifts in plankton diversity and microbial... -
A serious shoot and leaf disease caused by Colletotrichum theobromicola discovered on eucalypts in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Myriam Solís --- , South Africa Michael J Wingfield --- , South Africa Izette Greyling --- , South Africa Nam Q Pham --- , South AfricaEucalypt plantations in South Africa make up an important part of the local forestry industry. Recently, one-year-old nursery plants of a Eucalyptus grandis × Eucalyptus urophylla variety displayed symptoms of leaf and shoot anthracnose disease. Samples were collected from these... -
An allele-specific PCR assay for detection of mutations that confer benzimidazole resistance and zoxamide sensitivity in Phyllosticta citricarpa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Beatrix Coetzee --- Stellenbosch University, South Africa Elma Carstens --- Citrus Research International (Pty) Ltd, South Africa Gerhardus C Schutte --- Avima (Pty) Ltd, South Africa Elaine Basson --- Citrus Research International (Pty) Ltd, South Africa Mia J Groeneveld --- Stellenbosch University, South Africa Tankiso Mpholo --- Land Reform and Rural Development, South Africa Providence Moyo --- Citrus Research International (Pty) Ltd, South Africa Jessica C Winn --- Stellenbosch University, South Africa Paul H Fourie --- Citrus Research International (Pty) Ltd, South Africa Aletta E Bester van der Merwe --- Stellenbosch University, South AfricaPhyllosticta citricarpa is the causative agent of citrus black spot (CBS), a cosmetic fungal disease that has been reported in most of the citrus-growing regions of the world. The occurrence of CBS in orchards is predominantly controlled by the application...