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Prof Botma Visser takes on rust diseases threatening South Africa’s wheat

09 September 2025 | Story Martinette Brits | Photo Stephen Collett

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

UFS discontinues one Masters programme

2006-07-26

As from next year, the University of the Free State (UFS) will no longer offer one of its specialist master’s degrees in education – the M Ed in Education Management.

The other six M Ed programmes that are currently being offered at the UFS will continue as normal.

The decision to discontinue one of the M Ed programmes follows a national review of M Ed programmes in Educational Management and Leadership by the Higher Education Quality Committee (HEQC) of the Council on Higher Education (CHE).

Of the 23 tertiary institutions whose M Ed programmes in Educational Management and Leadership were reviewed by the HEQC, only 7 received full accreditation.

“The findings of the HEQC affect only one of our M Ed degree programmes, namely the M Ed in Educational Management,” said Prof Magda Fourie, Vice-Rector: Academic Planning at the UFS

“We will be paying full attention to the findings of the HEQC with a view to correcting some of the shortcomings that have been identified by the HEQC and will consider submitting a reviewed proposal for such a qualification in two years time,” she said.

According to Prof Fourie, the programme currently has 30 students enrolled. “These students – spread across their first and second years of the degree programme – will be allowed to complete their studies with the full support of the UFS and the School of Education,” said Prof Fourie.

“The qualification that has been awarded to students who have already completed their studies for this specific M Ed in Education Management degree programme remains a valid qualification and is not affected by the HEQC review,” said Prof Fourie.

She said the UFS welcomed the efforts of the HEQC to ensure that all academic programmes offered by higher education institutions meet certain standards.

“One of the primary problem areas in the M Ed in Educational Management offered by the UFS identified by the HEQC, was that the programme is too practice orientated and must be more theoretical to comply with the academic requirements of a master’s degree. This was a result of the fact that the programme was initially compiled in consultation with principals and the provincial Department of Education to address their needs,” said Prof Fourie.

“The UFS will in the mean time offer an advanced certificate in Educational Management and Leadership from next year. This is a new course that will stretch over a period of two years and will ensure that we can still address the needs of teachers and principals,” said Prof Fourie.

“The UFS remains committed to providing top quality degree programmes in all its six faculties and will continue to work with the HEQC in ensuring that this actually happens,” said Prof Fourie.

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
25 July 2006

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