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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

And the Best Managed Residence is…
2014-10-27


As examinations draw near and the end of the year is around the corner, residences want to know who the best of the best is.

During the 2014 Residence Awards on 22 October, the UFS announced their best managed residences of the year at the Bloemfontein Campus.

Wag-’n-Bietjie walked away with the spoils of the evening, winning both best managed female residence, and best managed residence overall. Armentum claimed the title of best managed male residence, while Sonnedou was named as the best managed day residence.

Further results for overall best managed residences and other categories are as follows:

Best Managed Residence
Male Residences:

  1. Armentum
  2. JBM Hertzog
  3. Karee

Female Residences:

  1. Wag-‘n-Bietjie
  2. Roosmaryn
  3. Soetdoring

Day Residences:

  1. Sonnedou
  2. Imperium
  3. Marjolein

Overall Ranking:

  1. Wag-‘n-Bietjie
  2. Armentum
  3. Roosmaryn

College
  1. South College (Armentum, Emily Hobhouse, Marjolein, NJ vd Merwe, Villa Bravado)
  2. East College (Arista, JBM Hertzog, Kayalami, Roosmaryn, Legatum, Sonnedou)
    and North College (Madelief, Tswelopele, Vergeet-my-Nie, Veritas, Welwitschia)
  3. Central College (Akasia, Kagiso, Karee, Soetdoring, Wag-‘n-Bietjie)
    and West College (Abraham Fischer, Conlaurês, Imperium, Kestell, Outiniqua)

Environmental Affairs
Male Residences:     JBM Hertzog
Female Residences:  Wag-‘n-Bietjie
Day Residences:        Sonnedou
Overall Winner:           Sonnedou

Diversity
Male Residences:                               JBM Hertzog
Female Residences:                          Akasia 
Day Residences:                                Arista
Best Improved Male Residence:         Villa Bravado
Best Improved Female Residence:    Kestell
Overall winner:                                    Akasia

Executive Portfolios
Male Residences:                               Tswelopele
Female Residences:                          Wag-‘n-Bietjie
Day Residences:                                Imperium
Best Improved Male Residence:         Tswelopele
Best Improved Female Residence:    Marjolein
Overall Winner:                                   Imperium

Academics
Male Residences:                               Outeniqua
Female Residences:                          Wag-‘n-Bietjie
Day Residences:                                Imperium
Best Improved Male Residence:         Imperium
Best Improved Female Residence:    Marjolein
Overall Winner:                                   Wag-‘n-Bietjie

Finance
Male Residences:                               Armentum
Female Residences:                          Roosmaryn
Day Residences:                                Imperium
Best Improved Male Residence:         Villa Bravado
Best Improved Female Residence:    Kestell
Overall Winner:                                   Armentum

Culture
Male Residences:                               Abraham Fischer
Female Residences:                          Wag-‘n-Bietjie
Day Residences:                                Sonnedou
Best Improved Male Residence:         Armentum
Best Improved Female Residence:    Akasia
Overall Winner:                                   Wag-‘n-Bietjie

Sport
Male Campus and Day Residences:           Armentum
Female Campus and Day Residences:      Wag-‘n-Bietjie
Best Male RC Sport:                           Armentum
Best Female RC Sport:                      Sonnedou

First-Years
Male Residences:                                                       Armentum 
Female Residences:                                                  Welwitschia
Day Residences:                                                        Sonnedou
Best Improved Male and Female Residence:            ConLaurês and Outeniqua
Overall Winner:                                                           Armentum

Prime
Male Residences:                               Tswelopele
Female Residences:                          Wag-‘n-Bietjie
Day Residences:                                Arista
Best Improved Male Residence:         Tswelopele
Best Improved Female Residence:    Arista
Overall Winner:                                   Tswelopele

Social
Overall Winner:                                   Karee
Best Improved Residence:                 Kestell

Economic and Management Sciences

Education

Health Sciences

The Humanities

Law

Natural and Agricultural Sciences

Theology and Religion

Open Distance Learning

Business School

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