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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

ANC Centenary Dialogue reflects on past leadership
2011-10-12

 

Making their mark at the ANC Centenary Dialogue were, from left to right: Prof. Kwandiwe Kondlo, Senior Professor: Centre for Africa Studies (UFS); Dr Adekeye Adebajo, Director: Centre for Conflict Resolution (Cape Town); and Prof.  E C Ejiogu, Senior Researcher: Centre for Africa Studies (UFS). 

The Centre for Africa Studies at our university recently hosted its ANC Centenary Dialogue at the Bloemfontein Campus. Keynote speaker, Dr Adekeye Adebajo, delivered a paper titled Nelson Mandela, Thabo Mbeki, and the ANC’s Footprint in Africa. The lecture focused on two of South Africa’s democratically-elected presidents.

Mr Nelson Mandela was South Africa’s first democratically-elected president. This Nobel Peace Laureate played a prophetic leadership role in Africa in 1993. He was inspired by Mr Mahatma Gandhi’s tactics of ‘passive resistance’, which played a role in the ANC’s Defiance Campaign.
 
Mr Mandela’s visit to other African countries gave him insights into continental diplomacy and the tactics of other liberation movements. “The ANC used Madiba to embody the face of the struggle. He emerged from prison without any bitterness towards his enemies. He tirelessly promoted national reconciliation,” said Dr Adebajo.
 
Unlike other post-independence ‘Founding Fathers’, Mr Mandela bowed out gracefully at the end of his first presidential term in 1999, setting a standard for future African leaders aspiring to greatness. “Mr Mandela’s lasting legacies are his efforts at promoting national and international peacemaking,” elaborated Dr Adebajo.
 
Mr Thabo Mbeki challenged Africans to discover a sense of their own self-confidence after centuries of slavery and colonialism. Under his foreign policy, South Africa established solid credentials to become Africa’s leading power. He sought multilateral solutions to resolve regional conflicts. Mr Mbeki also sent peacekeepers abroad and increased South Africa’s credibility as a major geostrategic player in Africa.
 
Many question whether Mr Mbeki’s heirs, President Jacob Zuma and beyond, will maintain the same level of commitment to the continent that he demonstrated. Mr Mbeki has bequeathed this foreign policy legacy to his successors. “These very different ANC leaders have left a heavy African footprint on the sands of time,” concluded Dr Adebajo.

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