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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

UFS produces an inspirational Summer Graduation
2016-12-12

Description: Dr Ferial Haffajee summer graduation Tags: Dr Ferial Haffajee summer graduation 

Dr Ferial Haffajee, editor-at-large at The Huffington
Post SA, who was conferred with an honorary doctorate,
and Dr Khotso Mokhele, the Chancellor of the
University of the Free State at this year’s Summer Graduation.
Photo: Eugene Seegers

“A graduation ceremony epitomises every student’s academic dream and pursuit, and allows you to look back as you enter the professional career of your choice.”

These were the words of guest speaker Dr Mafu Rakometsi, Chief Executive Officer of Umalusi, that resonated through the Callie Human Centre at this year’s Summer Graduation on the Bloemfontein Campus. He mentioned that today graduates would look back at a journey that started with hesitant steps, and despite all their ups and downs, they had managed to make it this far.

During the afternoon session, Prof Lis Lange, Vice-Rector: Academic, at the University of the Free State (UFS), said that graduations were always an occasion for celebration and this year, there were two reasons for these celebrations.

 “The first is simply that we made it through a difficult 2016 and the secondly because we are celebrating two crucial professions that will attribute to the well-being of this country, namely teachers and health practitioners.”

Meaningful graduation ceremony for Ferial Haffajee

This year, the UFS had the privilege and honour to confer editor-at-large at The Huffington Post SA, Ferial Haffajee, with an honorary doctorate in the Faculty of the Humanities.

Speaking after the graduation ceremony, Dr Haffajee said, “It was really, really meaningful for me, because I’ve never been able to graduate. When I finished university, it was during the struggle against apartheid, so we didn’t graduate. It was a wonderful day and wonderful to see the role that young people are playing on this campus.”

“Dr Ferial Haffajee has made a significant contribution to press freedom in South Africa. She is known both nationally and internationally for the work she has done and therefore it is an honour to welcome her as a Kovsie. She is one of the people who represent the values of the UFS. We are proud of her and we wish her great success,” said Prof Milagros Rivera, Head: Department of Communication Science and acting Dean of the Faculty of the Humanities at the UFS.

Description: Summer graduation 2016 general photo Tags: Summer graduation 2016 general photo 

Photo: Johann Roux

Inspiration drawn from graduation ceremonies

During his address, Dr Khotso Mokhele, the Chancellor of the UFS, made special mention of many that inspired him at the graduation ceremonies.

His inspirations included Dr Ambrotius Swartbooi, who suffered a spinal injury from a near-fatal car accident which left him paralysed and a quadriplegic, yet who still managed to receive his doctorate; Setsoane Ntseki, a matriculant with poise and an incredible voice, who delivered the song item; Judge Ian van der Merwe, Chairperson of the Council at the UFS and a close friend of Dr Mokhele, with whom he worked for many years; as well Dr Haffajee, a trail-blazer that many look up to.

Damian Viviers was recognised as one of the youngest PhD graduates in the Faculty of Law, where he received a PhD in Mercantile Law. He is a research fellow in the Department of Mercantile Law, and was recently appointed as candidate attorney in the commercial department at Phatshoane Henney Attorneys.

In closing, his message to the class of 2016 was simple, that even though the world and our country may find itself in an odd space now, the graduates needed to remember that even though they would become leaders, there was always something bigger than themselves.

“Go out there and do us proud. Come back and plough back into this institution not only with your money, but your skills and time too.”

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