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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

Statement by Judge Faan Hancke, Chairperson of the Council of the University of the Free State (UFS)
2008-03-08

The Council of the University of the Free State today (Friday, 7 March 2008) unanimously condemned the offensive and racist Reitz video in the strongest possible terms.

Council further labeled the video as an insult to women, to older persons and to poor working people who are defenseless and vulnerable and expressed its disgust at the action of the students concerned.

Council also apologised unreservedly and sincerely to the five UFS employees who were shown in the video and offered all emotional and counselling assistance necessary as well as in the current criminal matter under way or possible civil action they may undertake.

At the same time the university must also provide counseling to current first year students of Reitz who were not present at the time of the filming of the video.

Council also mandated the management, in addition to the other disciplinary steps under way, to consider the possibility of closure and of conversion of Reitz into a beacon of transformation, hope and liberation (either as a residence or in some other form).

This must take place in accordance with due process of the law to give residents and other stakeholders reasonable opportunity to make submissions so that all relevant considerations can be taken into account.

The Council expressed its full confidence in the management and supported the steps taken by management thus far under trying circumstances concerning transformation, residence integration, the Reitz video and the vandalism of the campus.

It reaffirmed the decision taken in June 2007 to increase diversity in student residences and recommitted the UFS to implement the policy.

The Council condemns all forms of racism and committed itself to eradicate racism and racial prejudice in any form and from any quarter on the UFS campus.

The meeting also approved the appointment of an external expert agency to assist the university in:

  • understanding and identifying the current challenges relating to the implementation of the integration policy 
  • supporting the university management and making recommendations on how to enhance the process of implementation

The intention is to provide additional capacity to the management in order to accelerate the transformation and integration process.

It called on management to take firm action against any staff or student who violates the law, is involved in threats, racism, disruptions, intimidation and vandalism and condemned these actions in the strongest possible terms.

The Council reassured all staff, students, parents and other stakeholders that firm action will be taken against persons who are guilty of disorderly conduct, intimidation, disruption or similar actions with the full force of the law.

The management was requested to maintain law and order so as to create a conducive environment in which academic excellence can be furthered. The Council appreciates the steps that have been taken in this regard.

The Council supported a management initiative to investigate the fundamental issues underlying many of the current problems in residences, including:

  • residence culture, including initiation, as well as race, racialism and racism
  • alcohol and drug abuse role,
  • place, organisation and management of residences constitution of student structures
  • and the role of political parties in student politics and structures
  • the physical structure of residences as part of a campus accommodation strategy

The Council agreed that social cohesion and racial tolerance will be highlighted as a strong theme in the academic cluster initiatives of the UFS and that management should find additional ways to strengthen existing programmes regarding diversity on the campus among all staff and students.

The Council called on all stakeholders to honour the high values of the Constitution of the country, to maintain these values and to further them in an orderly and peaceful environment.

Media Release
Issued by: Anton Fisher
Director: Strategic Communication
Tel: 051 401 3422
Cell: 072 207 8334
E-mail: fishera.stg@ufs.ac.za
7 March 2008

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