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09 September 2025 | Story Martinette Brits | Photo Stephen Collett
Prof Botma Visser
Prof Botma Visser delivered his inaugural lecture at the University of the Free State, highlighting nearly two decades of research on wheat rust and global food security.

Safeguarding one of the world’s most vital staple foods was at the heart of the inaugural lecture delivered by Prof Botma Visser, Professor in the Department of Plant Sciences at the University of the Free State (UFS), on Wednesday 3 September 2025. Prof Visser shared insights from nearly two decades of research into wheat rust – a devastating crop disease that threatens both South Africa’s harvests and global food security.

“Wheat production in South Africa is threatened by three fungal pathogens that cause rust disease on the crop. Understanding the factors that contribute to virulence on locally grown cultivars is crucial to ensure continued wheat production,” said Prof Visser.

 

The fight against evolving wheat rusts

For the past 17 years, Prof Visser’s research has focused on the genetic structure of rust populations and the risks they pose to food security. His work has shown that these populations are dynamic and constantly changing due to genetic mutations within existing races, as well as the introduction of new races into South Africa.

“Computer modelling showed that rust can spread over vast distances by prevailing winds. During the 20th Century, at least four Southern African stem rust races managed to move across the Indian Ocean from Southern Africa to Australia. South Africa, in turn, received multiple new races from mid-Africa across Zambia and Zimbabwe, without any means of stopping these introductions,” he explained.

To respond to this challenge, his team recently implemented MARPLE (Mobile And Real-time Plant disEase) diagnostics using fourth-generation nanopore sequencing technology. This approach allows the rapid characterisation of fungal isolates, specifically targeting genes linked to fungicide resistance and virulence.

“This work,” Prof Visser noted, “is part of an effort to safeguard global wheat production.”

His research is a collaborative effort with Prof Willem Boshoff (Department of Plant Sciences, UFS) and Dr Tarekegn Terefe (Agricultural Research Council – Small Grain, Bethlehem). Together, their work has positioned the UFS as an internationally recognised centre of excellence in wheat rust research.

 

About Prof Botma Visser

Prof Botma Visser obtained his BSc in Botany and Microbiology (1988), BSc Honours in Microbiology (1989), and MSc in Botany (1993) at the University of the Free State, where he also completed his PhD in Botany in 2004.

His career spans more than 18 years of research into wheat rust pathogens, combining annual surveys, race pathotyping, molecular genetics, and cutting-edge sequencing technologies. His expertise has not only advanced understanding of rust population dynamics in South Africa but also contributed to global collaborative studies on crop disease.

News Archive

Discussion on decolonising the UFS draws international speakers
2017-11-07


During an insightful two days (27-28 October 2017), bright young minds and experienced thinkers came together at the University of the Free State (UFS) to engage in deep philosophical talks on the topic of decolonisation.  The event was hosted by the university’s Centre for Africa Studies and the Department of Philosophy.

Heavyweight thinkers
Attendees to this colloquium were treated to the thoughts of renowned academics from various social sciences disciplines, including: Prof Francis B. Nyamnjoh, University of Cape Town; Prof Henning Melber, Dag Hammarskjöld Foundation, Nordic Africa Institute, University of London, University of Pretoria and the UFS; Prof Heidi Hudson, UFS; Prof Sabelo J Ndlovu-Gatsheni, University South Africa; Alida Kok, Unisa; and from the UFS Prof Johann Rossouw, Dr Stephanie Cawood, Dr Christian Williams, and Khanya Motshabi. All the speakers had extensive global experience that allowed them to use practical examples to illustrate theoretical ideas. These ranged from students removing colonial spirits with African rituals, incorporating indigenous knowledge systems in curricula, to the creation of cultural houses on campuses where students can become acquainted with different cultures in a safe space.  

 

 Description: Decolonising colloquium bigger Tags: Decolonising colloquium bigger

Questions from attendees at the recent colloquium on decolonising the university,
hosted by the Centre for Africa Studies and the Departement of Philosophy,
showed a search for solutions to the current decolonising dilemma.
Photo: Charl Devenish


Where to from here?
Questions from attendees showed a search for solutions to the current decolonising dilemma. How will it look? Is it possible? Has it worked anywhere? During the two days, it became clear that colonialism reaches far and deep, rendering decolonisation a complex problem that should be addressed carefully to avoid greater divisions. “Colonisers and colonised are two sides of a coin,” Prof Melber explained. “Essentially it means that we are part of the same coin.” This metaphor illustrated how there is no right or wrong world view, or right or wrong knowledge – there should, however, be an integrated approach suitable for that “one coin”. 

It starts at home
Successful decolonisation starts in the mind, it was agreed. Colonisation robbed us all of a richness of knowledge by offering absolutes, or “the only truths”. Questioning existing colonial knowledge and exploring other bodies of knowledge will ultimately lead to a new world of knowledge. Being mediators between the different worlds of knowledge is what the new generation of academics needs to become.  

 

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