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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

Reverend Frank Chikane honours ‘Oom Bey’ at second Beyers Naudé Memorial Lecture for 2012
2012-09-11

Rev. Frank Chikane and Dr Choice Makhetha, Vice-Rector: External Relations at the UFS.
Photo: Stephen Collett
10 September 2012

The 9th Beyers Naude Memorial Lecture, a partnership initiative between the University of the Free State (UFS) and Kagiso Trust, was held on the South Campus of the university last week. The theme of the lecture focused on Collaborative partnership for social cohesion: Building of a nation with ethics.

Guest speaker, Reverend Frank Chikane, is a member of the UDF, ANC, Director-General in the Office of the President and a board member of Kagiso Trust.

In his speech, Rev. Chikane focused on the first 45 years in the life of Beyers Naudé, sketching a picture of a man who lived for what he believes in. When this former minister of the South African Dutch Reformed Church and member of the Broederbond, decided to question the morality of the Apartheid government after the Sharpeville Massacre in 1960, he made some changes in his beliefs and started to play a big role in the struggle against apartheid.

“If one know about ‘Oom Bey’s’ earlier life, you will see how radical his contribution was in turning South Africa from a country on the brink of destruction to a country of peace. ‘Oom Bey’ must be seen as a role model, someone we can aspire to be in South Africa today,” Rev. Chikane said.

“From his legacy one sees elements of someone building a nation with ethics.

“He took sides with the poor against an unjust system. Power breaks cohesion. It makes people not to think,” Rev. Chikane said.

If Afrikaners and black people stood together after the South African War (Anglo-Boer War), we would have talked a different language today. However, they did not. Afrikaners stood together, excluding black people and cohesion between all races was destructed. ‘Oom Bey’ tried to build relationships between people from all races in South Africa in an effort to create peace amongst all people. He was alienated from the Broederbond and defrockedrom the church.

In his speech, Rev. Chikane also said that South Africa did not succeed in collaborative partnerships in terms of the economy. “We need collaborative action to change our economy. This specific failure can destroy all that we have built together.”

“All South Africans can be like ‘Oom Bey” and make a contribution, especially in terms of the economy. To deal with this challenge, we can all contribute. This is important because due to a poor economy, many people are desperate and desperate people can destroy any relationship that we might have built so far.”

At this event, the university and Kagiso Trust also announced the winners of a poetry and essay competition that coincided with this last Beyers Naudé lecture for 2012. The award ceremony looked at the creativity of the learners, how they expressed themselves as well as the novelty of their work. Students as well as learners from schools in the Free State participated in the competition and first, second and third place winners received cash prizes as well as a book from Rev. Frank Chikane for their brilliant work.
 

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