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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

Triumph of the Human Spirit – a symbol of hope
2015-08-24

Ahmed Kathrada discusses his latest book, Triumph of the Human Spirit.
Photo: Johan Roux

“A triumph of courage and determination over human frailty and weakness; a triumph of the new South Africa over the old.” – Ahmed Kathrada

Ahmed Kathrada, stalwart of South Africa’s liberation struggle, visited the Bloemfontein Campus on 18 August 2015 to launch his latest book, Triumph of the Human Spirit. Turning page after page, the reader travels back with Uncle Kathy – as he is fondly known – to revisit Robben Island with the more than 300 guests he has accompanied since 1994. With each photo – be it a celebrity or school child, head of state or famous artist, friend or royalty – the significance of the island is eternalised, right alongside Ahmed Kathrada.

Message of triumph
“Why this specific title for the book?” Prof André Keet, Director of the Institute for Reconciliation and Social Justice (IRSJ), asked during the book launch. “Robben Island,” Kathrada answered, “should not be remembered only as a place of suffering – that’s history. But the message of Robben Island is the message of triumph – triumph of the human spirit over all sorts of adversities.”

Speaking about Kathrada’s quiet but profound impact, Zaakirah Vadi, editor of the book, said “I think Uncle Kathy does not realise what an inspiration his own strength of spirit is”. The fight for human values and dignity was “honed and perfected in the cells of Robben Island,” she said. “It created the vision for a new South Africa and, as Uncle Kathy puts it, the triumph of the new South Africa over the old.”

UFS surprises Ahmed Kathrada with a birthday cake.
Photo: Johan Roux

Freedom was sacrifice
This triumph was not achieved without a cost, though. “No freedom comes on a platter,” Kathrada said. “Freedom was fought for. Freedom was sacrifice. Through the sacrifices of those who did not survive, we are still here to tell the story.”

And that is exactly what Triumph of the Human Spirit does. As Kgalema Motlanthe writes in the foreword, “This book serves as a preservation of history and a symbol of hope.”

Birthday celebration
Just as the event seemed to come to a close, members of the Student Representative Council carried a candle-lit cake – shaped in the number 86 – toward Kathrada. This surprise was organised by the UFS to celebrate his birthday on 21 August 2015. And, as the audience cheered and sang, Kathrada’s smile spread like a light across the hall.

 

 

 

 

 

 

 

 

 

 

 

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