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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

Students have a responsibility in SA, says Ntuli
2016-02-19

Description: 2016 SRC presidents Tags: 2016 SRC presidents

Lindokuhle Ntuli (left), President of the Student Representative Council (SRC) on the Bloemfontein Campus of the University of the Free State (UFS), and Paseka Sikhosana, president of the SRC on the Qwaqwa Campus, are in agreement about their vision for the UFS in 2016.
Photo: Johan Roux

You and I have a role to play in building the new South Africa built upon the Constitution of 1996.

These are the words of Lindokuhle Ntuli, President of the Student Representative Council (SRC) on the Bloemfontein Campus of the University of the Free State (UFS). They echo his and the SRC’s message of a “campus for all students, locally and internationally, irrespective of colour.”

Ntuli and Paseka Sikhosana, president of the SRC on the Qwaqwa Campus, were in agreement about their vision for the UFS in 2016.

According to Sikhosana, a well-known slogan accentuates a feeling of uniqueness at the university. “United in diversity. No wonder we say only a Kovsie knows a feeling,” he says.

“As the SRC, we believe that complete transformation on campus is through promoting a non-sexist, non-racial, but democratic student society that acknowledges diversity and change. That further promotes and embraces one student’s difference in terms of culture, tradition, religion, and sexual orientation.”

A new South Africa

Ntuli means students have a responsibility. He referred to a quotation from Frantz Fanon’s book, The Wretched of the Earth, to illustrate this. Fanon was a revolutionary and writer whose works are influential in post-colonial studies. “Every generation has a mission. It is the responsibility of every generation to discover its mission. Once you have discovered it, you have to fulfil it or betray it into relative obscurity,” Ntuli quoted.

According to him, the South African Constitution holds pious promises of a better life for all, and each citizen needs to help to achieve that.

SRC has open door policy 

Ntuli says the UFS remains committed to human embrace, diversity, integration, and human togetherness. He added that the SRC has an open door policy, and will avail itself in helping students.

According to Sikhosana, it is the objective of the SRC to represent the student community in all interactions within the university and externally.

“There is nothing for us, about us, without us students,” he says.

• The above excerpts have been taken from Ntuli and Sikhosana’s respective welcoming speeches to first-year students on the Bloemfontein and Qwaqwa Campuses.

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