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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

Leader of Bafokeng nation delivers a guest lecture at UFS
2011-05-05

 
Kgosi Leruo Molotlegi, leader of the Royal Bafokeng, Proff. Teuns Verschoor, Vice-Rector: Institutional Affairs, Jonathan Jansen, Vice-Chancellor and Rector of our university, and Hendri Kroukamp, Dean of our Faculty Economic and Management Sciences (acting).
Photo: Stephen Collett

Kgosi Leruo Molotlegi, leader of the Royal Bafokeng nation, asked the pertinent questions: Who decides our fate as South Africans? Who owns our future? in the JN Boshoff Memorial Lecture at our university.

He said: “It’s striking that today, with all the additional freedoms and protections available to us, we have lost much of the pioneering spirit of our ancestors. In this era of democracy and capitalist growth (systems based on choice, accountability, and competition), we nevertheless invest government with extraordinary responsibility for our welfare, livelihoods, and even our happiness. We seem to feel that government should not only reconcile and regulate us, but also house us, school us, heal us, employ us, even feed us.

“And what government can’t do, the private sector will. Create more jobs, invest in social development and the environment, bring technical innovations to our society, make us part of the global village. But in forfeiting so much authority over our lives and our society to the public and private sectors, I believe we have given away something essential to our progress as people and a nation: the fundamental responsibility we bear for shaping our future according to aims, objectives, and standards determined by us.”

He shared the turnaround of the education system in the 45 schools in the 23 communities of the Bafokeng nation and the effect of greater community, NGOs, the church and other concerned parties’ engagement in the curricula and activities with the audience. School attendance improved from 80% to 90% in two years and the top learners in the matric maths in Northwest were from the Bafokeng nation. 

Kgosi Leruo Molotlegi stressed the need for people to help to make South Africa a better place: “As a country, we speak often of the need for leadership, the loss of principles, a decline in values. But too few of us are willing to accept the risk, the expense, the liability, and sometimes even the blame, that accompanies attempting to make things better. We are trying to address pressing issues we face as a community, in partnership with government, and with the tools and resources available to us as a traditionally governed community. It goes without saying that we can and should play a role in deciding our fate as members of this great country, and in the Royal Bafokeng Nation, as small as it is, we are determined to own our own future.”

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