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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

Pursuit of excellence a strong focus for incoming UFS Vice-Chancellor
2017-02-06

Description: Official opening 2017 Tags: Official opening 2017

Prof Francis Petersen, the incoming
Vice-Chancellor and Rector of the UFS,
shared his future plans for the university
with staff during the official opening.
Photo: Johan Roux

Video clip
Photo gallery

The newly elected Chairperson of the UFS Council, Mr Willem Louw, and Prof Francis Petersen, the incoming Vice-Chancellor and Rector of the UFS, were welcomed at this year’s official opening of the academic year which took place at the Bloemfontein Campus of the University of the Free State (UFS) on 3 February 2017.  

Prof Petersen, who will start his tenure at the UFS on 1 April 2017, was introduced to staff by the Acting Rector, Prof Nicky Morgan. Prof Petersen shared his future plans for the UFS with staff.

His vision for the UFS spells excellence. Among others, he seeks to establish an academic culture of excellence, underpinned by the pillars of diversity and inclusivity. “It is important that there should be respect for different convictions,” he said.

“The UFS should be a place where everyone feels welcome; a strong sense of belonging is needed. Staff and students should feel that they would like to make a contribution to make the UFS a strong university,” he said.

In order to address the institutional climate issue, Prof Petersen suggests that attention be given to the curriculum as well as transformation of the research culture. Research outputs should be expanded and diversified. Inclusivity from a community engagement perspective is also needed. “The things we are good at and in which we excel should be the anchors impacting our academic enterprise,” he said.

In terms of the physical environment, he said that spaces should be welcoming for students. “It is important that we sit with students to get their views and listen to their concerns,” Prof Petersen said.

To promote transformation at the university, the UFS management team is busy working on an integrated transformation plan to be submitted to Council in June 2017. As part of this process, consultations will be held with staff and students in order to incorporate their perspectives and convictions in the plan as well.

“It is important that there should be
respect for different convictions.”

Furthermore, it is important for Prof Petersen that the Qwaqwa and South Campuses should be more integrated with the Bloemfontein Campus. “The UFS is one university with three locations. The fact that it is one university should be reflected in our actions, attentions, and thoughts. Although there are geographical differences, all three campuses should receive the same resources and should deliver the same quality outputs,” he said.

Prof Petersen ended his speech by returning to the importance of academic excellence. “With the Academic Project we always strive for excellence. To achieve academic excellence, the focus is on both academic and support staff. In order to reach our goal, all staff should produce work of superior quality,” he said.

“I am a good listener who is outcome driven, with a vision that includes: diversity, inclusivity, academic excellence, and innovation”, Prof Petersen concluded.  

 

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