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

TEDxUFS conference - the highlight of the university’s innovative calendar

2015-08-11

Mmusi Maimane, leader of the Democratic Alliance with co-organisers of TEDxUFS Bonginkosi Leeuw and Lerothodi Molete after his inspirational talk at the event.
Photo: Curtis Nhlamulo Mashimbye

This year’s TEDxUFS speaker lineup persuaded the audience unanimously to question the nature of reality. The Albert Wessels Auditorium on the Bloemfontein Campus was packed with about 200 attendees on Saturday 1 August 2015.

Speakers shared a multiplicity of profound theories and inquisitions, challenging society in general to think out of the box. Melody Mentz, Gil Oved, Ricardo Peach, Pamela Nomvete, Pepe Marais, Mmusi Maimane, Brian Kally, Pieter Geldenhuys, Philippa Tumubweinee, Gareth Cliff, and Angelo Mockie took on to the stage to tackle multidisciplinary concepts as part of the broad ‘Ask Why’ theme.

Innovation mouthpieces share their worldview

Pieter Geldenhuys, the internationally-renowned futurist and Director of the Institute for Technology Strategy, and Innovation proposed that we change our mindsets by neglecting predictability. “We need to look at different models to understand the world around us,” he said. He challenged the linear and familiar ways humans make sense of the universe.

Speaking to the dire need for transformation, Philippa Tumubweinee suggested that university spaces merge with the communities they serve in terms of policies, social atmosphere, and physical structure. Tumubweinee is a senior Lecturer at the Department of Architecture at our university, and co-Founder and Director of Izuba In Africa architects.

“Only we can give permission to be intimidated; so don’t give in,” said Brian Kally, the CEO of Arrow Logistics (Pty) Ltd. Kally underscored the power of believing in our individual ideas.

Guidelines from TEDxUFS organisers

Bonginkosi Leeuw: “If you take your brainchild and implement it, and make it a reality, that’s when you can achieve great things, not before that.”

Lerothodi Molete: “You should ask questions; the moment you ask the question you will understand more.”

Real-time social media feedback

These are some of the comments audience members published on Twitter at the event:

IG: mispertanzy ?@MiesperTanzy Aug 1

A huge shout-out to @TEDxUFS for hosting such a great conference!The team has really made the event an unmissable one on the UFS calendar.

Celebrabitur? ?@HatsuMphatsoe Aug 1

Proximity that allows us to experience our broader society. Truly engaged by Philippa Tumbweinee's talk! @TEDxUFS

TEDxJohannesburg ?@TEDxJoburg Aug 1

A big shoutout to @TEDxUFS from for a fantastic event. Wish we were there.

RicardoPeach ?@ricardopeach Aug 1

Africa is rich with potential #TEDXUFS @MmusiMaimane Yes!

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