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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

Researcher in mathematics ranks among world’s top peer reviewers
2016-10-07

Description: Abdon Peer Review Tags: Abdon Peer Review

Prof Abdon Atangana, from the UFS Institute
for Groundwater Studies.
Photo: Johan Roux

Thirty-year-old Prof Abdon Atangana has received the prestigious Sentinels of Science Award 2016. This award honours the highest achievers in peer review across the world’s journals. The elite contributors to scholarly peer review and editorial pursuits internationally are also honoured with this award. Recipients have demonstrated an outstanding, expert commitment to protecting the integrity and accuracy of published research in their field.

Prof Atangana, who ranks number one in the mathematics discipline with a merit of 324, is a professor at the Institute for Groundwater Studies at the University of the Free State (UFS).

He is editor of 17 international journals, editor-in-chief of two international journals and also reviewer of more than 200 international accredited journals. He has been lead and guest editor of some special issues. He is also editor of 19 journals of applied mathematics and mathematics and has presented and participated in more than 20 international conferences.

Prof Atangana’s research interests are methods and applications of partial and ordinary differential equations, fractional differential equations, perturbations methods, asymptotic methods, iterative methods, and groundwater modelling.

“Editors in more than 100 journals
trust my opinion to assess
whether a submitted paper
can be published or not.”

Peer review requires a respected expert in a given field

According to the professor, reviewers play a central role in scholarly publishing. “In the academic field, peer review is the process of subjecting an author’s scholarly work, research, or ideas to the scrutiny of others who are experts in the same field, before a paper describing this work is published in a journal or as a book. The peer review process helps the publisher to decide whether the work should be accepted, considered acceptable with revisions, or rejected.

“Peer review requires a respected expert in a given field, who is qualified and able to perform the review in a given timeframe. Due to the impact of my research papers in the field of mathematics and applied mathematics, and also my international recognition in the field of applied mathematics, many editors in more than 100 journals of applied mathematics trust my opinion to assess whether a submitted paper in a given journal of mathematics and applied mathematics can be published or not. Only this year I was able to review more than 100 papers from different journals of applied mathematics, applied physics, mathematics, engineering and hydrology,” he said.

A successful peer reviewer displays passion for the development of science

Key to his success as peer reviewer is his passion for the development of science, his ability to write fair reports about a given manuscript, as well as his knowledge on what has been done and what are the challenges in a given field to be able to give a report that will help the advancement of science.

Currently he is developing new mathematics tools that will be used to accurately model statistical problems as well as physical problems with many layers.

“To be the number one peer reviewer in the world in mathematics is a product of love, patience and determination to enhance science,” Prof Atangana said.

His advice to young researchers is to put their trust in God and to work hard. “Not necessarily for money but for love because the future of Africa is in the hands of young Africans,” he said.

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