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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

Johann Naudé talks at first Beyers Naudé lecture for 2012
2012-08-02

At the event were, from the left: Ms Bontle Senne, Managing Director for the PUKU Children’s Literature Foundation, Mr Sipho Hlongwane, writer and columnist for the Daily Maverick, Prof. Nicky Morgan, Vice-Rector: Operations at the UFS, Mr Themba Mola, Chief Operations Officer at Kagiso Trust, Mr Johann Naudé, son of Dr Beyers Naudé, and Dr Choice Makhetha, Vice-Rector: External Relations.
Photo: Stephen Collett
2 August 2012

The University of the Free State (UFS) together withKagiso Trust, presented the first Beyers Naudé lecture for 2012 on its South Campus in Bloemfontein last week. Speakers like Dr Wilmot James, Member of Parliament, Mr Johann Naudé, son of Dr Beyers Naudé, Mr Sipho Hlongwane, writer and columnist for the Daily Maverick and Ms Bontle Senne, Managing Director for the PUKU Children’s Literature Foundation, all gave a lecture around this year’s theme: Collaborative partnerships for social cohesion: Building a nation with ethics.

Dr Beyers Naudé played a major role in the formation of Kagiso Trust. His contribution to the trust and the fight against oppression in South Africa, as well as his challenging of the establishment from which he came, makes him one of South Africa’s courageous heroes. Kagiso Trust thus saw it fit to celebrate the life of this clerical activist through a Memorial Lecture The Beyers Naudé Memorial Lecture is an effort by the Trust to engage South Africans into a dialogue about issues affecting our nation.

Mr Johann Naudé talked about the lessons they as children learnt from their parents as well as his father’s decision to respond to the needs of the people in South Africa. Even before the Sharpeville Massacre, Dr Naudé began a self-transformation that led to his rejection of apartheid. “Apartheid had no theological or scriptural grounds and my father decided to resign from the church. After that, he started to talk openly against apartheid and he also paid the price for that. For seven years he was under house arrest and we as his children also felt the effect of his decision. At the University of Pretoria in a residence where I stayed as a student I was called in and told that I would be treated as an outcast. Loans and jobs were also closed for us as children and as a result, we all started our own businesses,” Mr Naudé said.

“Furthermore, our parents taught us to believe in ourselves. He also said we have rights and we can only demand those rights if we take the responsibility that goes with it. My father also taught us to honour and to respect our fellow men, elderly people and the culture of people different from us. We were also taught to apologise for the wrongs to our fellow men and to acknowledge earnestly that we were wrong.”

Dr Wilmot James said that there were two things consistent in the life of Dr Beyers Naudé, namely justice and fairness. “There are many Nelson Mandelas and Beyers Naudés out there. It is the responsibility of political parties and institutions to motivate such leadership. We must ask ourselves: Are my actions and decisions ethical and will they have fair consequences?” Dr James said.

Mr Hlongwane focused his presentation on the ethics part of the theme. He said: “We in South Africa fall very short of ethics. We can start by respecting each other and taking care of one another. The Constitution will not mean a thing if we fail to respect and trust one another. We will have no cohesive society if we continue to treat those different from us like dirt. It is also our ethical duty to build up the disadvantaged.

In her discussion, Ms Senne emphasised the role of the youth in South Africa. “Our youth is failing our state because our state is failing our youth. Their role is to bring cohesion and acts of courageousness to the table. For them to contribute in a practical and sustainable manner, they need to start making the changes they want to see in society. They are young people and they can make it work because they do have access to the necessary means (social networks) to get things done. They must get involved,” she said.

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