Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
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

Kovsie archer aims for 2016 Olympics
2014-04-24


Sariça Coetzee

For some of us, archery is just something we see on film and television, like in the Hunger Games movies or on the Arrow TV series. Sariça Coetzee, a first-year BA Psychology and Criminology student, however, is almost like South Africa’s very own Katniss Everdeen.

Sariça recently won two gold medals in the division for Junior Women at the South African National Archery Association’s (SANAA’s) National Archery Championships. With the qualifying heats taking place next year, the Olympic Games of 2016, which is just around the corner, is beckoning her.

“I am working hard to get there and would love to go,” says Sariça.

“I train on a regular basis with Riaan Schoeman from Kovsies’ Exercise and Sport Sciences, in order to improve my technique and strength.”

Sariça’s training includes shooting at targets and spending time in the gym.

“I spend about three hours per day, four days a week, on training. In archery it is crucial to be able to keep your body stable when the wind is blowing.”

Sariça, who matriculated at Sentraal High School in Bloemfontein, stared with archery seven years ago.

“We drove past Old Grey’s archery club and I just wanted to do it as well,” she says.

“I begged my parents for almost a year to let me do it. They thought it was just a passing fancy, but I really developed a passion for the sport and had a feeling for archery from the beginning.”

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept