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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

The TRC legitimised apartheid - Mamdani
2010-07-20

 Prof. Mahmood Mamdani
“The Truth and Reconciliation Commission (TRC) accepted as legitimate the rule of law that undergirded apartheid. It defined as crime only those acts that would have been considered criminal under the laws of apartheid.”

This statement was made by the internationally acclaimed scholar, Prof. Mahmood Mamdani, when he delivered the Africa Memorial Lecture at the University of the Free State (UFS) last week on the topic: Lessons of Nuremberg and Codesa: Where do we go from here?

“According to the TRC, though crimes were committed under apartheid, apartheid itself – including the law enforced by the apartheid state – was not a crime,” he said.

He said the social justice challenges that South Africa faced today were as a result of the TRC’s failure to broaden the discussion of justice beyond political to social justice.

He said it had to go beyond “the liberal focus on bodily integrity” and acknowledge the violence that deprived the vast majority of South Africans of their means of livelihood.

“Had the TRC acknowledged pass laws and forced removals as constituting the core social violence of apartheid, as the stuff of extra-economic coercion and primitive accumulation, it would have been in a position to imagine a socio-economic order beyond a liberalised post-apartheid society,” he said.

“It would have been able to highlight the question of justice in its fullness, and not only as criminal and political, but also as social.”

He said the TRC failed to go beyond the political reconciliation achieved at Codesa and laid the foundation for a social reconciliation. “It was unable to think beyond crime and punishment,” he said.

He said it recognised as victims only individuals and not groups, and human rights violations only as violations of “the bodily integrity of an individual”; that is, only torture and murder.

“How could this be when apartheid was brazenly an ideology of group oppression and appropriation? How could the TRC make a clear-cut distinction between violence against persons and that against property when most group violence under apartheid constituted extra-economic coercion, in other words, it was against both person and property?”, he asked.

“The TRC was credible as performance, as theatre, but failed as a social project”.

Prof. Mamdani is the Director of the Institute of Social Research at the Makerere University in Kampala, Uganda; and the Herbert Lehman Professor of Government in the Department of Anthropology at the Columbia University in New York, USA.

Media Release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt@ufs.ac.za  
20 July 2010
 

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