Latest News Archive

Please select Category, Year, and then Month to display items

Prof Botma Visser takes on rust diseases threatening South Africa’s wheat

09 September 2025 | Story Martinette Brits | Photo Stephen Collett

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

We must rise again, says Dr Luescher

2016-05-04

Dr Thierry Luescher, Assistant Director of University of the Free State Directorate for Institutional Research and Academic Planning, was one of the guest speakers at the first TEDxUFS event of the year on the Bloemfontein Campus. Here he is explaining where the #movements started, and how to change the way we think. Photo: Marli du Plessis.

The student protests, known as the #MustFall movements, started on 9 March 2015, when students protested in a well-rehearsed manner at the Cecil John Rhodesstatue at the University of Cape Town. After this protest, students all over South Africa started their own movements from #OpenStellies to #SwartsMustFall, the latter happening on the Bloemfontein Campus of the University of the Free State (UFS) in March 2016. But, as Dr Thierry Luescher, Assistant Director of UFS Directorate for Institutional Research and Academic Planning, says: “We shall soon run out of #MustFalls. Maybe it is time that we rise again.”

The first TEDxUFS was held on Friday 15 April 2016 at the New Education Building on the Bloemfontein Campus of the UFS. Dr Luescher shone light on the way we look at hashtag movements. At the conference, he was one of the guest speakers who shared their perspectives on the theme of #ImpossibleIsNothing. The others were Ndumiso Hadebe, and Fezile Sonkwane.

Changing angles

No matter what the issue, whether it is on a campus or not, the same reaction can be expected by all: they burn things to get attention. In retrospect, this is our political culture. This is what we have been told to do if we need answers. There is a much faster and cheaper way to attract people’s attention: the hashtag movements, says Dr Luescher.

Stop the fire

He argues that we should stop burning down buildings and vandalising properties. What we need is people with intellect to use their words. We, as students, have to take back our voice. We need to stop this self-pitying, and take a stand.

Students have the power to change lives. We would be able to reach as many as 1.4 million people with our tweets or instagram accounts. According to Dr Luescher, the time for violence has come to an end.

Back

Economic and Management Sciences

Education

Health Sciences

The Humanities

Law

Natural and Agricultural Sciences

Theology and Religion

Open Distance Learning

Business School

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept