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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 Council unanimously approves two senior appointments
2014-11-24

The Council of the University of the Free State (UFS) unanimously approved the appointment of Dr Lis Lange as Vice-Rector: Academic and Prof Sechaba Mahlomaholo as Dean: Education during its meeting on Friday 21 November 2014.

Dr Lis Lange is currently Acting Vice-Rector: Academic at the University of the Free State, where she holds a substantive position as Senior Director heading the Directorate for Institutional Research and Academic Planning (DIRAP). Prof Mahlomaholo is Head of the School of Mathematics, Natural Sciences and Technology Education at the UFS.

“These are two exceptional and trusted academics with international stature and I am delighted to welcome them as part of the senior leadership of the UFS. Dr Lange’s skills set pertaining to academic management and quality assurance make her one of only a few people with similar skills in the country, while Prof Mahlomaholo is a leading expert in community-based education,” says Prof Jonathan Jansen, Vice-Chancellor and Rector of the UFS.

Dr Lange joined the UFS in 2011. Before this, she was the Executive Director (2006-2010) of the Higher Education Quality Committee of the Council of Higher Education (CHE), and Acting CEO of the same organisation between August 2007 and April 2008. She has been involved in the development and implementation of science and technology and higher education policy in South Africa for a decade and a half, working in different capacities in the Human Sciences Research Council, the National Research Foundation and the Council on Higher Education. Dr Lange has served as a member of the board of the International Network of Quality Assurance Agencies in Higher Education (INQAAHE) and has participated in several international initiatives on quality assurance. She is the editor of an academic journal focused on the humanities, Acta Academica.

She has undertaken research and published in the fields of history, higher education and quality assurance. Her major concern in both research and practice is the role of higher education in the development of democratic societies, based on social justice. Dr Lange studied in Argentina, Mexico and South Africa, where she obtained a PhD in South African history from the University of the Witwatersrand.

Prof Mahlomaholo is a graduate of the Universities of the North, Western Cape and Harvard University in the United States. He is a National Research Foundation (NRF)-rated Professor of Education.

Before joining the UFS, he worked at six other universities where he was Deputy Dean in the Faculty of Education (UNIN-QwaQwa), Head of Professional Education (Vista University), Professor and Director of Research and Postgraduate Studies (MEDUNSA), Professor and Director of Curriculum Development (Central University of Technology), and Research Professor (North-West University).

His research interests lie in designing strategies mounted on Bricolage, Participatory Action Research and Critical Emancipatory Research as theoretical bases. He leads the NRF-sponsored project on the creation of Sustainable Learning Environments in schools. In this Participatory Action Research project, 28 PhD and 22 MEd students participate under the guidance of 15 academics. The project has relationships with the Global Network project (St Petersburg University), the Post-Colonial Education project (West Indies University) and the Discourse, Power, Resistance project (Plymouth University and now University of London). He has served as guest editor in the following ISI-indexed, peer-reviewed and accredited journals: the South African Journal of Higher Education (2010 and 2014), the South African Journal of Education (2011), Communitas (2012), the Journal of New Generation Sciences (2012), the Journal for Transdisciplinary Research in Southern Africa (2013) and the Journal of Education Studies (2013).

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