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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

#Women’sMonth: Who am I? Questions of identity among Rwandan rape survivors
2017-08-03

 Description: Michelle Nöthling, Questions of identity among Rwandan rape survivors Tags: Michelle Nöthling, Questions of identity among Rwandan rape survivors 

Michelle Nöthling, master’s degree student
in the Centre for Trauma, Forgiveness, and
Reconciliation Studies at the UFS.
Photo: Eugene Seegers

From 7 April to 15 July 1994, a mass genocide swept through Rwanda after years of Belgian colonial rule that divided the country along ethnic lines. Rape was also used as part of a political strategy to torture and humiliate mainly Tutsi women, and as a means of spreading HIV.

Individual focus
Why is it important to listen to what these rape survivors have to say? Michelle Nöthling, a master’s student in the UFS Centre for Trauma, Forgiveness, and Reconciliation Studies, responds, “We speak of groups – refugees, foreigners, and the like – yet we tend to forget the individuals and the lasting impact trauma has had on each person.”

Narrative exploration
Michelle maintains that we are the product of the narratives around us; things like – how to be a woman, how to dress, speak, or treat others. Her research delves into how these rape survivors see themselves, how they narrate their lives. She also investigates power relations based on gender; for example, how language can be used as a divisive tool.

Rwandan backdrop
In Rwanda, gender roles are deeply entrenched. Traditionally, a ‘girl’ remains such while she is a virgin. Her transition into womanhood is usually marked by marriage and followed by motherhood. But rape disrupts this structure, leading to an identity crisis as these girls are catapulted into motherhood with an unplanned child resulting from a traumatic event.

“We are the product of
the narratives around us.”

Reaching their mid-teens, the children, too, started asking questions about identity or paternity. For those mothers who were finally able to open up to their children, the experience has been mostly liberating – often leading to a closer relationship between parent and child. Michelle intends to interrogate how such significant moments shape the way these women perceive themselves. Research tends to portray these survivors solely as mothers of rape-born children. Michelle, however, seeks to examine their identities more deeply.

“These survivors still bear the heavy burden of being marginalised, stigmatised, and severely humiliated. Despite this, they have developed their own communities of belonging; people with whom they connect, to whom they relate, and to whom they are not ashamed to tell their experiences,” she said.

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