Eucalyptus and Pine Pathogen Interactions

FABI News

News Archive

10 Sep 2026

CryptoADAPT team completes fieldwork in Mapungubwe National Park

A CryptoADAPT team conducted a field trip to Mapungubwe National Park

8 Sep 2026

Thirteen FABIans conferred postgraduate degrees at the UP Spring Graduation

FABI congratulates the 13 graduates from the Institute capped at UP's Spring Graduation ceremony.

7 Sep 2026

FABI hosts first CryptoADAPT workshop on <I>Cryptococcus</I> biodiversity

FABI hosts first CryptoADAPT workshop on Cryptococcus biodiversity

FABI hosted the first CryptoADAPT workshop from, bringing together researchers from five countries and seven academic institutions

4 Sep 2026

Congratulations to Lazarus on completing his PhD!

Well done Lazarus on successfully completing your PhD!

1 Sep 2026

Aaron Harvey secures second runner-up at the 2026 UP Visualise Your Thesis competition

Aaron Harvey has been awarded Second Runner-Up in the 2026 Institutional Visualise Your Thesis competition, hosted by UP’s Department of Research and Innovation.

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FABI Events

21 September 08h30

Monday Morning Meeting

28 September 08h30

Monday Morning Meeting

01 October 08h30

Student Seminars

05 October 08h30

Monday Morning Meeting

FABI in a nutshell

Research Features

Archive

Tracing the past, building the future: FABI research unlocks the genetics and genomics of the Sirex woodwasp complex

FABI researcher co-authors global perspective on mycotoxins and food safety.

FABI researchers Prof. Cobus Visagie, Dr Neriman Yilmaz, and Nicole van Vuuren, together with international collaborators, have published a comprehensive taxonomic revision of the fungal order Eurotiales, which includes the economically important genera Aspergillus, Penicillium, and Talaromyces.

New publication explores the chemodiversity of Penicillium isolated from alpine and arctic environments, including ten new species.

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.

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Forest tree species such as Eucalyptus and Pine are subjected to attack by various pests and pathogens during their life-time. Examples are the insect pest, Leptocybe invasa, the stem canker pathogen, Chrysoporthe austroafricana, the root rot pathogen, Phytophthora cinnamomi, and the pitch canker pathogen Fusarium circinatum. Disease incidence is exacerbated by climate change, which is predicted to make environments more favorable for pathogens and pests. "Host-jumping" from native hosts to forest plantations has been reported. Such threats are especially severe for clonally propagated tree species such as Eucalyptus as entire plantations could be lost due to susceptibility of a particular clone. Thus genotypes with improved resistance or tolerance are necessary as part of an integrated management strategy to curb losses due to pests and pathogens. It is with this vision that the Eucalyptus and Pine Pathogen Interactions programme was initiated. The research in our programme is aimed at understanding the plant defence mechanisms that exist in Eucalyptus and Pine trees which may be harnessed to improve its resistance capacity in future. We are currently dissecting the Eucalyptus defensome (or defence transcriptome) based on the recently released genome sequence of Eucalyptus grandis, coupled with data from high-throughput transcriptome technologies.

Collaboration:

Tree Pathology Co-operative Programme
Sappi and Mondi

On-going projects:

Projects undertaken by EPPI aim to (i) ascertain the molecular basis of disease responses in Eucalyptus to a canker pathogen Chrysoporthe austroafricana (ii) determine the molecular defence mechanisms of E. grandis against the gall wasp Leptocybe invasa and (iii) determine the effectiveness of induced resistance in Pinus patula against Fusarium circinatum. These pathosystems provide the biological platform to address key questions such as: "What is the molecular basis of tolerance and susceptibility?", "What are the signature defence responses to different types of pests and pathogens?", "What are the convergent defence responses in the host?" and "Which regulatory sequences and defence genes could be targeted for enhancing defence in the host?". This would provide a basis to implement biotechnology strategies to develop resistant families (seedling forestry) or clones (clonal forestry) in future.

Workshops & Symposia

Archive

The TPCP / FMG-EPPI Symposium 2026

New Publications

Aylward J, Roets F, Wingfield BD, Wingfield MJ. (2026) Seiridium insolitum sp. nov.: a new canker pathogen on Cupressus and Hesperocyparis in Southern Africa. Journal of Plant Pathology 10.1007/s42161-026-02302-z

Pham NQ, Suzuki H, Marincowitz S, Roets F, Paap T, Kapsosideris N, Wingfield BD, Wingfield MJ. (2026) Two decades of the Immersiporthe knoxdaviesiana (Cryphonectriaceae) canker outbreak driven by clonal pathogen lineages. Plant Pathology 75:e70274. 10.1111/ppa.70274

Gürtel ND, Pham NQ, Roux J, Nel WJ, Wingfield BD, Wingfield MJ. (2026) The pine-infesting bark beetle, Cyrtogenius luteus (Coleoptera: Scolytinae), discovered in South Africa. African Entomology 34:e27477. 10.17159/2254-8854/2026/a27477

Schröder ML, van Noort S, Greyling I, Hurley BP. (2026) Parasitoid diversity associated with Phoracantha semipunctata and Phoracantha recurva in South African Eucalyptus plantations. . African Entomology 34 0.17159/2254-8854/2026/a25013

Mbamali SKS, Mohlomi N, Van Der Nest MA, Mchunu NP, Permaul K. (2026) Reciprocal Genome Projection Reveals Reference-Conditioned Functional Variation in Clinical Aspergillus Section Nigri Isolates. Pathogens 10.3390/pathogens15090941

Nadasen TR, Hein I, Berger DK. (2026) Structural phylogenetics identifies conserved effector families and cell death-inducing proteins from Cercospora zeina. Molecular Plant-Microbe Interactions First Look 10.1094/MPMI-05-26-0048-R

Schertler A, Lenzner B, Dullinger S, Moser D, García-Rodríguez A, Krisai-Greilhuber I, Voglmayr H, Bufford JL, Santini A, Ghelardini L, Capinha C, Reino L, Wingfield MJ, Thines M, Talhinhas P, Dawson W, van Kleunen M, Kreft H, Pergl J, Pyšek P, Weigelt P, Winter M, Essl F. (2026) Are novel and co-xenic associations common in alien fungal and fungus-like plants pathogens?. New Phytologist 10.1111/nph.71455

Thango S, Nsibo DL, Berger DK, Visagie CM, Slippers B. (2026) Phenotypic variation in the in vitro and in planta aggressiveness traits among Exserohilum turcicum strains from South Africa. Plant Pathology 75(4):e70257. 10.1111/ppa.70257

Bradshaw MJ, Paul A, Villani S, Bensch K, Mitchell KJ, Pfister DH, Visagie CM, Garfinkel AR, Quesada-Ocampo L, Aime MC, Braun U. (2026) Modern taxonomy as the foundation for identifying and managing fungal and fungus like plant pathogens. Plant Disease 10.1094/PDIS-12-25-2537-FE

Balocchi F, Wingfield MJ, Paap T. (2026) Occurrence of Phytophthora cinnamomi in the rhizosphere of declining Leucadendron elimense subsp. salteri in South Africa. Forest Pathology 56(4):e70097. 10.1111/efp.70097

Pham NQ, Wingfield BD, Marincowitz S, Marpaung YMAN, Selebi AP, Tarigan M, Wingfield MJ. (2026) A novel Cryphonectria species (Cryphonectriaceae, Diaporthales) discovered on Eucalyptus, including insights into the mating biology of the genus. Fungal Biology 130:101831. 10.1016/j.funbio.2026.101831

Kim JS, Lee W, Seo CW, Lee JW, Perera RH, Rho SM, Visagie CM, Houbraken J, Lim YW. (2026) A comprehensive assessment of Penicillium diversity in marine environments. Studies in Mycology 115:1–57. 10.3114/sim.2026.115.01

Jami F, Truter M, Pavlic M, Chen SF, Roux J. (2026) Identification of Botryosphaeriaceae species in the South African National Collection of fungi, including a novel species of Oblongocollomyces. African Biodiversity & Conservation 56(1):1-13.

Vettraino AM, Bose T. (2026) Urban green spaces as emerging hotspots for Phytophthora diversity: a global synthesis of host associations, distribution and management gaps. Frontiers in Forests and Global Change 9:1872981. 10.3389/ffgc.2026.1872981

Burgess TI, Wingfield MJ. (2026) Unveiling a hidden menace: Invasive tree pathogens, less known but increasingly threatening Southern hemisphere forests. Annual Review of Phytopathology 64 10.1146/annurev-phyto-011325-100959

Motete T, Solís M, Hammerbacher A, Naidoo S. (2026) Gene expression profiling in Eucalyptus associates Phenylpropanoid resistance to Teratosphaeria destructans. Plant Pathology 10.1111/ppa.70207

Aylward J, Atkins S, Roets F, Danti R, Della Rocca G, Emiliani G, Fraser S, Garbelotto MM, Herron DA, Scali E, Wingfield BD, Wingfield MJ. (2026) High genetic diversity in the Cypress canker pathogen Seiridium cardinale in the Southern Hemisphere. Plant Pathology 75 10.1111/ppa.70212

van Heerden A, Pham NQ, Duong TA, Wingfield MJ, Wingfield BD. (2026) Draft genome sequence of Ganoderma philippii, a serious root rot pathogen of Eucalyptus in Southeast Asia. Australasian Plant Pathology 55:81. 10.1007/s13313-026-01159-1

Schoeman C, Roodt D, Mc Menamin A, Bezuidt O, Dithugoe C, Pinard D, Mizrachi E. (2026) Conserved symbiosis-associated genes in the cycad Encephalartos natalensis suggest co-option for cyanobacterial symbiosis. New Phytologist 10.1111/nph.71311

Townsend G, Hill M, Hurley BP, Roets F. (2026) Native Scolytinae and Platypodinae beetle assemblages in indigenous South African forests and their co-occurrence with the invasive PSHB beetle. Journal of Insect Conservation 30 10.1007/s10841-026-00779-8

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