FABI News
22 Apr 2025
FABIans enjoy an Easter Tea
FABIans took some time off to enjoy the traditional annual Easter Tea on the morning of 16 April.
18 Apr 2025
Congratulations to Tanay Bose on receiving his Y1 NRF rating
Congratulations to Dr Tanay Bose on receiving his Y1 rating from the NRF.
17 Apr 2025
FABI's Prof. Irene Barnes presents her inaugural address
Professor Irene Barnes presented her inaugural address in the University of Pretoria’s Senate Chamber on 9 April, marking the inauguration of her acceptance as a full Professor.
16 Apr 2025
FABI participates in the Westerdijk Fungal Biodiversity Institute's Spring Symposium
Prof. Cobus Visagie represented FABI at the recent Westerdijk Fungal Biodiversity Institute's Spring Symposium.
16 Apr 2025
Congratulations to Chris Weldon on being promoted to a full Professor!
Congratulations to Prof. Chris Weldon on presented his inaugural lecture as full Professor.
FABI in a nutshell
Research Features
Review emphasizes the importance of understanding the genetics of sex determination for effective genetic pest management in insects.
Eleven new Penicillium and Talaromyces species discovered in South African culture collections.
A new study reveals the presence of Mycotoxins in Eastern Cape maize in South Africa.
Eurotiales update: FABIans Prof. Cobus Visagie and Dr Neriman Yilmaz and their collaborators have published a review of recently described Eurotiales species, including the economically important Aspergillus, Penicillium, Paecilomyces and Talaromyces.
Da Vinci's Yeast: FABIans Prof. Cobus Visagie, Dr Neriman Yilmaz, and their collaborators have recently described and named a newly discovered yeast species of the famous Italian painter, draughtsman, engineer, scientist, theorist, sculptor, and architect Leonardo da Vinci.
The potential economic impact of the PSHB invasion in South Africa has been calculated to be a massive R275 billion over the next ten years, if nothing is done to stop the spread of this invasive beetle. Researchers from FABI collaborated with Stellenbosch University ecologists and economists to model the unmitigated economic impact of this invasion.
A recently published paper in the journal Current Forestry Reports documents a collaboration between an international team of forest pathologists and invasion scientists. Led by Dr Trudy Paap, the authors present a framework for conceptualizing and managing invasive forest pathogens.
A recently published review article by Dr Andi Wilson in a special issue of the journal 'Microbiology & Molecular Biology Reviews' provides details of the genes that are essential to the sexual cycle in filamentous Ascomycete fungi and further describes their functions in a variety of model and non-model species.
Penicillium section Canescentia re-evaluated and five new species described from the fynbos biome in South Africa.
In November 2019, the DSI-NRF Centre of Excellence for Invasion Biology hosted a workshop on ‘Frameworks used in Invasion Science’. The workshop led to a NeoBiota special issue on this theme, and includes a review by FABI researchers and international colleagues, exploring frameworks in the context of forest pathology.
A doctoral study in FABI confirms for the first time the presence of Xylosandrus crassiusculus, a polyphagous ambrosia beetle and its fungal symbiont, Ambroseilla roeperi, in three provinces in South Africa. The authors warn that this beetle species could be a threat to native and plantation trees.
A review on invasive gall-forming wasps that threaten non-native Eucalyptus plantations by researchers in the TPCP appears in Agricultural and Forest Entomology. They profile several species of likely Australian origin that have established on non-native Eucalyptus plantations globally and discuss various challenges to their management.
A study in the TPCP confirms the identity of seven novel fungal species associated with Dendroctonus valens, the red turpentine beetle. The study follows on surveys on the fungal associates of the beetle in China and North America. Results from this work appear in Persoonia.
A postdoctoral study in the TPCP describes two novel Huntiella species in the African clade, bringing the number of known species in the genus to 31. Though closely related, the two species display different mating systems. Outcomes from this study appear in the journal MycoKeys.
A review of the invasion history and global management strategies of Eucalyptus snout beetles in the Gonipterus scutellatus species complex by researchers in the TPCP appears in the Journal of Pest Science.
In a collaborative venture with Dr Jos Houbraken (Westerdijk Fungal Biodiversity Institute, the Netherlands), Prof. Cobus M Visagie, Dr Neriman Yilmaz (both from FABI) and others have recently completed and published a major study updating the taxonomy of the Eurotiales.
A study in the Forest Molecular Genetics (FMG) Programme at FABI interrogates the benefits of implementing genomic selection for growth and wood quality traits in an established Eucalyptus grandis breeding programme in South Africa. Outcomes from this study appear in an article.
The first study on alternative weed and cultivated hosts of Spongospora subterraneaf. sp. subterranea (Sss), in southern Africa identifies two species as ideal trap crops for rotation with potatoes. The study also introduces three new families to the known hosts of Sss in the region.
A consortium of microbiologists from around the globe, FABI included, is pushing for an overhaul in how scientific names are assigned to uncultivated bacteria and archaea. Despite their ecological, agricultural and medical importance, these organisms traditionally have not been recognized by the international body governing the nomenclature of prokaryotes.
Professor Cobus Visagie is a researcher in the Applied Mycology group at FABI. One of the group’s research goals is to discover fungal diversity in South Africa, and Cobus’ research is strongly focussed on the economically important genera Aspergillus, Penicillium and Talaromyces.
Postdoctoral research by Dr Norman Muzhinji in the Potato Pathology Programme at the Forestry and Agricultural Biotechnology Institute (FABI) sheds light on the genetic structure and diversity of Spongospora subterranea f. sp. subterranea in four potato-growing regions in South Africa, providing valuable insights on its management.
An MSc study by Kira Lynn in the RGE-FABI Tree Health Programme at the University of Pretoria has described a new Fusarium species, Fusarium rekanum sp. nov., associated with Euwallacea perbrevis, an ambrosia beetle species infesting Acacia crassicarpa plantations in Riau, Indonesia.
FABI postdoctoral Fellow Dr Andi Wilson has established a CRISPR-Cas9-based genome editing protocol for use in Huntiella omanensis, a tree-inhabiting fungus belonging to the Ceratocystidaceae family.
Research undertaken as part of a PhD study by Molly Malefo at the University of Pretoria’s Department of Plant and Soil Sciences and Forestry and Agricultural Biotechnology Institute sheds more light on the role of protease inhibitors in plants under drought stress.
The South African National Biodiversity Institute (SANBI) has funded a postdoctoral research project dedicated to monitoring plant health in botanical gardens and arboreta across South Africa. Two postdoctoral Fellows at the University of Pretoria’s Forestry and Agricultural Biotechnology Institute have held these fellowships.
The first comprehensive study mapping the distribution and genetic diversity of invasive Eucalyptus insect pests in sub-Saharan Africa confirms the presence of five major foliage-feeding species in 14 countries. The results of this study have implications on the quarantine, future research and management of these pests on the continent and beyond.
Dr Joey Hulbert broke new ground when he became the first candidate at the Forestry and Agricultural Biotechnology Institute to complete a PhD study incorporating citizen science. Citizen science is an approach that involves members of the public as active participants in scientific research.
FABI technology unravels the genetics behind fungal genome evolution The RIPper is a bioinformatics tool for the for quantifying genome-wide RIP mutations in fungal genomes. The strength of this software lies in the automation of laborious techniques to study the mutation process called Repeat-Induced Point mutations (RIP). The RIPper applies these technique
With the increased availability in genome data, inferences regarding evolutionary relationships among taxa can now be performed on a genome-wide scale. But it is widely accepted that not all parts of such massive datasets support the same evolutionary hypothesis. Because of this, a group of researchers at FABI recently investigated the effect of this.
The use of genome data to characterize species and elucidate relationships, particularly between problematic taxa, has become routine practice in bacteria. Recently, researchers from FABI joined in an international effort to describe two novel genera and characterize these within the larger context of the important bacterial group Burkholderia.
A PhD student in FABI, Runlei Chang, has discovered and described 19 new fungal species from China as part of the research for his thesis. These fungi are all associated with conifer-infesting bark beetles and their mites and belong to well-known genera such as Ophiostoma and Leptographium.
Two research papers from FABI were selected as cover stories in two consecutive issues of the international journal, Plant Pathology. The journal is published by Wiley for the British Society of Plant Pathology.
Plastids play an integral role in wood formation, and yet they are routinely ignored in the study of xylogenesis in forest trees. Desre Pinard and Dr Eshchar Mizrachi have published a review highlighting the unique biology of plastids in wood, suggesting that a new type of plastid, the xylopast, exists.
Approaches for characterizing metabolic potential from genomic sequences have previously been predicted to be useful in the description of bacterial taxa. Dr Marike Palmer, has recently employed these approaches for identifying biological processes contributing to the divergence of bacteria with a variety of lifestyles.
Comparative genomics is shaping our notion of what fungal species are. Based on current data, these unique evolutionary units are separated from one another by boundaries that are porous under certain conditions. This affects our expectations regarding their population biology and evolution, and our strategies for recognizing and controlling them.
The Polyphagous Shot Hole Borer is an ambrosia beetle native to Southeast Asia. In 2017 this pest was detected in South Africa. Its presence has since been confirmed in all provinces except Limpopo. The beetle has a symbiotic relationship with the fungus Fusarium euwallaceae, which causes branch die-back and death of susceptible trees.
This website serves as a link and resource for the research and forestry community interested in the invasive pest, Sirex noctilio (the Sirex Woodwasp), and its control.
Just over 100 years has passed since the Eurasian woodwasp Sirex noctilio, first appeared outside its native range, in pine plantations of New Zealand. This alien invasive pest, together with its Amylostereum areolatum fungus symbiont, gradually spread, first to Australia and later, in the 1980's to South American countries. Sirex continues to spread in South America and alarmingly, in the early 1990's appeared for the first time on the African continent, in South Africa. Just two year's ago the wasp was encountered in New York and it is now known to be established in eastern North America. In every country where S. noctilio has become established, it has resulted in considerable damage and cost to local economies. There can be no doubt that the global spread of Sirex is set to continue. Special measures and a resurgence of research effort will clearly be required to contain the negative impacts of this scourge to global forests and forestry.
The first appearance of the Eurasian woodwasp in the southern hemisphere led to a period of intensive research on this pest. Substantial attention was given to control options that included the discovery and deployment of various biological control agents such as the wasp parasitoid Ibalia leucospoides and the parasitic nematode Deladenus siricidicola. These agents, together with silvicultural practices to reduce stress in plantations and stop the spread of the wasp, have yielded impressive control of Sirex, particularly in areas where Sirex first appeared. Control of Sirex in areas that it has more recently invaded has yielded variable and sometimes disappointing results. This could be attributed to factors relating to pine hosts new to Sirex, climatic conditions different to those where biological control has been effective, mismatch of biotypes of the wasp, its fungal symbiont or its parasites, or indeed a great number of other factors.
The website contains:
- LITERATURE - View, download and contribute papers linked to Siricidae, their associated fungi, tree hosts, parasites and control programs.
- LINKS - Sirex noctilio and Siricid related links
If you wish to contribute images or papers, or would like to join the SIREX LISTSERVER, linking the community of people working on this pest, please This email address is being protected from spambots. You need JavaScript enabled to view it. Bernard Slippers.
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New Publications
Bose T, Wingfield MJ, Brachmann A, Witfeld F, Begerow D, Kemler M, Dovey S, Roux J, Slippers B, Vivas M, Hammerbacher A. (2025) Removal of organic biomass in Eucalyptus plantations has a greater impact on fungal than on bacterial networks. Forest Ecology and Management 586:122734.
10.1016/j.foreco.2025.122734
Maduke N, Slippers B, Van der Linde E, Wingfield M, Fourie G. (2025) Botryosphaeriaceae associated with racemes, fruits and leaves of macadamia in South Africa. Plant Pathology 0:1–15:1–15.
10.1111/ppa.14107
Knoppersen RS, Bose T, Coutinho TA, Hammerbacher A. (2025) Inside the Belly of the Beast: Exploring the Gut Bacterial Diversity of Gonipterus sp. n. 2. Microbial Ecology 88:27.
10.1007/s00248-025-02524-1
Bose T, Roux J, Titshall L, Dovey SB, Hammerbacher A. (2025) Mulching of post-harvest residues and delayed planting improves fungal biodiversity in South African Eucalyptus plantations and enhances plantation productivity. Applied Soil Ecology 210:106091.
10.1016/j.apsoil.2025.106091
Wychkuys KA, Giron E, Hyman G, Barona E, Castro-Llanos FA, Sheil D, Yu L, Du Z, Hurley BP, Slippers B, Germishuizen I, Bojacá CR, Rubiano M, Sathyapala S, Verchot L, Zhang W. (2025) Biological control protects carbon sequestration capacity of plantation forests. Entomologia Generalis
10.1127/entomologia/2025/3015 
Balocchi F. (2025) Risk Analysis for Alien Taxa (RAAT) for Phytophthora cinnamomi in South Africa.
10.5281/zenodo.14858265
Paap T, Balocchi F, Wingfield MJ. (2025) The root rot pathogen Phytophthora cinnamomi: a long-overlooked threat to the Cape Floristic Region of South Africa. Biological Invasions 27(4)
10.1007/s10530-025-03570-z
Harikrishnan K, Rajeshkumar KC, Patil PM, Jeewon R, Visagie CM. (2025) Aspergillus dhakephalkarii and A. patriciawiltshireae spp. nov., two new species in Aspergillus sect. Nigri ser. Japonici (Eurotiales, Aspergillaceae) from India. Phytotaxa 695:57–79.
10.11646/phytotaxa.695.1.2
Dewing C, Visagie CM, Steenkamp ET, Wingfield BD, Yilmaz N. (2025) Three new species of Fusarium (Nectriaceae, Hypocreales) isolated from Eastern Cape dairy pastures in South Africa. MycoKeys 115:241–271.
10.3897/mycokeys.115.148914
Coertze S, Visagie CM, Rose L, Slippers B, Mostert D, Makhura T, de Villiers D, Basson E, Coetzee B, Read D. (2025) First report of Clavibacter nebraskensis, causing Goss’s bacterial leaf blight on maize (Zea mays L.) in South Africa. Plant Disease
10.1094/PDIS-01-25-0164-PDN
van der Merwe E, Slippers B, Dittrich-Schröder G. (2025) Exploring artificial diets for the laboratory rearing of Sirex noctilio late-instar larvae: a qualitative study. Zenodo
10.5281/zenodo.15049303
Mapfumo P, Archer E, Swanevelder ZH, Wilken M, Creux N, Read DA. (2025) Plant Pathology. Genomic Characterisation of Bidens mottle virus in South Africa and an Assessment of the Impact on Helianthus annuus (Sunflower) in an Open Field Setting
10.1111/ppa.14089
Brasier CM, Grünwald NJ, Bourret TB, Govers F, Scanu B, Cooke DEL, Bose T, Hawksworth DL, Abad ZG, Albarracin MV, Alsultan W, Altamirano-Junqueria AE, Arifin AR, Arnet MJ, Aumentado HDR, Bakonyi J, Belisle WH, Benigno A, Bienapfl JC, Bilodeau GJ, Blair JE, Botella L, Brandano A, Cacciola SO, Carbone I, Castroagudin VL, Chaendaekattu N, Consford JD, Corcobado T, Covey PA, Daniels HA, Deidda A, Dorrance AE, Dort EN, Drenth A, Drizou F, Evangelisti E, Fajardo SN, Fang Y, Ference CM, Frankel SJ, Goss EM, Guest DI, Hardy GESJ, Harris ARH, Hawku MD, Heungens K, Hong C, Horner IJ, Horta Jung M, Iyanda OJ, Jamieson B, Jeffers SN, Judelson HS, Junaid M, Kalogeropoulou E, Kamoun S, Kang S, Kasuga T, Kudláček T, LeBoldus J, Lee CA, Li D, Llanos AK, Lopez-Nicora HD, Machado H, Di San Lio GM, Maia C, Mandal K, Manosalva P, Martin FN, Matson MEH, McDougal RL, McDowell JM, Michelmore RW, Milenković I, Moricca S, Mostowfizadeh-Ghalamfarsa R, Nagy Z, Nikolaeva EV, Ortega-López P, Paap T, Parada-Rojas CH, Peduto Hand F, Perez-Sierra A, Pettersson M, Prasad P, Puig AS, Raco M, Rajput NA, Ristaino JB, Rooney-Latham S, Seidl MF, Shamoun SF, Solla A, Spies CFJ, Sudermann MA, Swiecki TJ, Tian M, Tripathy S, Uematsu S, Van Poucke K, Vichou AE, Walter M, Webber JF, Williams NM, Wingfield MJ, Yadav D, Yang X, Jung T. (2025) Preserving the Biologically Coherent Generic Concept of Phytophthora, ‘Plant Destroyer’. Phytopathology
10.1094/PHYTO-11-24-0372-LE
Stazione L, Corley JC, Allison JD, Hurley BP, Lawson SA, Lantschner MV. (2025) Novel associations among insect herbivores and trees: Patterns of occurrence and damage on pines and eucalypts. Ecological Applications 35:e70018.
10.1002/eap.70018
Townsend G, Hill M, Hurley BP, Roets F. (2025) Escalating threat: increasing impact of the polyphagous shot hole borer beetle, Euwallacea fornicatus, in nearly all major South African forest types. Biological Invasions 27
10.1007/s10530-025-03551-2
Makunde PT, Slippers B, Bush S, Hurley BP. (2025) Host specificity and host stage preference of Psyllaephagus species (Hymenoptera: Encyrtidae) towards invasive eucalypt psyllids (Hemiptera: Aphalaridae). Agricultural and Forest Entomology :1-13.
10.1111/afe.12679
Tarigan M, Wingfield MJ, Jami F, Oliveira LSS, Saha MA, Durán A, Pham NQ. (2025) Pathogenicity of Pythium myriotylum on Acacia crassicarpa and Acacia mangium × Acacia auriculiformis clones in Indonesia. Southern Forests: a Journal of Forest Science 87:1–5.
10.2989/20702620.2024.2432863
D’Angelo D, Hu H, Lahoz E, Risteski J, Steenkamp E T, Viscardi M, van der Nest M A, Wu Y, Yu H, Zhou J, Karandeni Dewage C S, Kotta-Loizou L I, Stotz H U, Fitt B D L, Huang Y, Hu Y, Kiss L, Sorrentino R, Nkomo T, Zhou X, Vaghefi N, Sonnekus B, Bose T, Cerrato D, Cozzolino L, Creux N, D’Agostino N, Fourie G, Fusco G, Hammerbacher A, Idnurm A, Wingfield BD. (2025) IMA GENOME - F20 A draft genome assembly of Agroathelia rolfsii, Ceratobasidium papillatum, Pyrenopeziza brassicae, Neopestalotiopsis macadamiae, Sphaerellopsis filum and genomic resources for Colletotrichum spaethianum and Colletotrichum fructicola. IMA Fungus 16:e141732.
10.3897/imafungus.16.141732
Espach A, Esterhuizen L, Africander N, Thiart S, Read DA, Pietersen G. (2025) First report of pepper ringspot virus on potato (Solanum tuberosum) in South Africa. Journal of Plant Pathology
10.1007/s42161-025-01887-1
Muema EK, van Lill M, Venter SN, Claassens R, Steenkamp ET. (2025) Mesorhizobium salmacidum sp. nov. and Mesorhizobium argentiipisi sp. nov. are symbionts of the dry-land forage legumes Lessertia diffusa and Calobota sericea. Antonie van Leeuwenhoek 19(3):1-20.
10.1007/s10482-025-02063-2