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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

Meet our Council: Kgotso Schoeman - I’m not afraid of challenges
2016-04-21

Description: Kgotso Schoeman  Tags: Kgotso Schoeman

Mr Kgotso Schoeman
Photo: Stephen Collett

It’s not often that someone is asked a favour by the MEC of Education. However, when it does happen, it is a sign that he has full confidence in you and your abilities. This is exactly what happened to Mr Kgotso Schoeman, one of the Council members of the University of the Free State (UFS).

Mr Schoeman, who was approached by the MEC of Education in the Free State, Mr Tate Makgoe, to serve on the UFS Council, has been involved with the Kagiso Trust for the past 20 years, and now serves as the CEO of Kagiso Capital. The Kagiso Trust was established in May 1985 by anti-apartheid activists, including Archbishop Desmond Tutu, Dr Beyers Naudé, and Prof Jakes Gerwel, in order to channel funds for the promotion of the struggle against apartheid, and for the upliftment and empowerment of communities. Today, education plays a leading role in the activities of the trust.

Mr Schoeman is now serving his second term on the UFS Council.  At the start of his term, he expressed a particular interest in learning more about the inner workings of universities, and the UFS in particular.  He believes the past two years, have been very informative in this regard.

"I have been very impressed with the academic performance of the UFS, and I have learned a lot about university governance and management during this time.  I do think, however, that there is a lot of room for improvement with regard to transformation at the UFS, especially at academic staff level," he says.

One of the issues that he has become aware of over the past two years, and which concerns him greatly, is the relationship between higher education institutions and the Department of Higher Education and Training.  It relates to another matter of concern: how higher education should be funded in South Africa.

"These are issues I raise at every Council meeting, because I feel these points are important not only for the future of the UFS, but for all higher education institutions in the country," he says.

When it comes to hobbies, Mr Schoeman loves reading. However, it is not fiction that interests him, but rather books on leadership and the changes experienced by today’s society. “In one of the educational programmes we offer, there are opportunities for people to discuss complicated topics, such as transformation. I find it fascinating to see how people can change their point of view in the course of these discussions.”

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