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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 hosts a successful New Music Indaba
2015-08-18

  

Held at the University of the Free State’s Odeion School of Music (OSM), the NewMusicSA’s New Music Indaba 2015 featured works which Clare Loveday described as “breathtaking, discreet, and perfectly balanced.”

Loveday, one of South Africa’s acclaimed music critics and was Composer-in-Residence for the annual Johannesburg International Mozart Festival, attended the Indaba from 21-26 July 2015. In a review of Saturday’s gala concert, she referred to recitals of this nature as an “essential part of the South African musical landscape, providing musicians and composers a space in which to express their world.”

Staff and students of the OSM were extensively involved in facilitating the festivities as a symbol of commitment to South Africa and international contemporary art music. The OSM Camerata under the baton of Xavier Cloete performed two works by South African composer Hendrik Hofmeyr well as a work by young Argentinian composer Diego Soifer entitled Mille Regretz .The festival featured music theory lectures, a variety of workshops, roundtable discussions ,concerts as well as an outreach programme.

Loveday described the highlight of her Indaba experience as “A delicate construction of sounds and silences that drew the listener into a focused and intense sound world,” a highlight created by the visiting German composer, Charlotte Seither’s “Far From Distance” for piano, clarinet, and cello. The concert evening culminated with Diale Mabitsela's "Friday Nights at Six," adding to the spectacular nature of the festival.

Throughout the week, classical chamber works featuring South African New Music Ensemble (SANME), the Choir of Christ Church Arcadia, and the Odeion Vocal Consort were performed and well-received. Bringing the five-day event to a conclusion was a choral mass at the Bloemfontein Anglican Cathedral, featuring an “Agnus Dei” written by George T. King.
 
Douglas Scott, Curator of the 2015 Indaba, reflected on it as a great success, saying that, “most of the participants agreed the event was a wonderful opportunity simply to hear different voices from the composition community juxtaposed with one another.”

From Scott’s perspective, the principal goal was to foster communication between artists with different visions, and to reach out to the local community.

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