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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 implements access control measures on our Bloemfontein Campus

2014-11-21

Photo: Hannes Pieterse

Online Application form: non personnel

Map with access gates on the Bloemfontein Campus

Accessing the Bloemfontein Campus from 3 November 2014

Access control during major events on the Bloemfontein Campus

Q&A

The University of the Free State (UFS) has been tightening security measures on its Bloemfontein Campus for quite some time now. Purposefully, we have consolidated several safety measures to keep our students, staff and visitors – the heartbeat of our university – protected.

Our most significant step in this endeavour is now in the process of implementation. All five entrance gates to the campus are being equipped with strict access control.

The first phase of the process was implemented beginning of August 2014. Gates 2 (Badenhorst Street) and 4 (Furstenburg Street) were equipped with card readers. Only persons with valid access cards can enter and leave through these gates. Existing staff and student cards are equipped to be read by the short-distance card readers at the gates in order to activate the booms.

At this stage, staff and students are swiping their cards against the card readers at Gates 2 and 4 or holding it not further than 20 mm from the reader for the boom to open. Card holders now physically stop in front of the boom in order to get access to the campus.

The duel-frequency card:

The dual-frequency cards available at the Card Division on the Thakaneng Bridge are currently out of stock. New cards will be delivered on Friday 14 November 2014.

The special offer of R30 per access card has been extended to the end of November 2014. To qualify for this offer, staff and students may pay the R30 for a dual-frequency card at the bank or cashiers on the Thakaneng Bridge no later than 28 November. The cost of dual-frequency cards will increase to R60 per card from 1 December 2014.

Please note that only people with vehicles need to apply for dual-frequency cards.

Students and staff will, however, still be able to gain access to the Bloemfontein Campus with their current cards (in the case of staff and students who haven’t purchased dual-frequency cards yet). As is currently the practice at the gates in Furstenburg and Badenhorst Streets, you will have to stop when you reach the boom, swipe your card past the card reader, the boom will open and you will be able to drive through.

Staff and students using their dual-frequency cards should:

-       Reduce speed
-       Hold the card in a vertical position at the driver’s side window, in the direction of the long-distance reader (see photo)

It is therefore not necessary to stop in front of the boom. On holding your card upright, in line with the card reader, the gate will open automatically and you will be able to drive through (keep your card outside your window; the card reader cannot operate through tinted windows).

Please note that this arrangement only applies to incoming lanes. On leaving the campus, the card has to be swiped. This is due to the number-plate recognition technology installed at exits for additional security.

If the long-distance reader does not work, the dual-frequency card can still be used at a tag reader.

Applying for your new card:

Electronic fund transfers: Absa Bank: 1 570 8500 71, Ref: 1 413 07670 0198, OR pay the R30 at the UFS Cashiers, Thakaneng Bridge. Please note that the price of the cards will increase to R60 from 1 November 2014.

Take your existing personnel or student card, together with proof of payment, to the UFS Card Division, Bloemfontein Campus, Thakaneng Bridge, to have your photo taken and your new dual-frequency card issued.

Permission to access specific UFS buildings or facilities linked to your existing card, will be automatically linked to the new card.

The new card is marked ‘dual’ on the back in the right, bottom corner.

The UFS Cashiers will provide assistance between 09:00 and 14:30, and the UFS Card Division between 09:00 and 15:00.

Implementation of full access control

Full access control will be implemented on the UFS’s Bloemfontein Campus from 3 November 2014. This means that access control will be implemented at all gates on the Bloemfontein Campus.

Who is using which gate? See Q&A for more information.

Gate 3 (Wynand Mouton Drive) is earmarked for use by official card holders. These include students, staff and persons doing business on campus. Parents dropping and fetching their children for sports, as well as service providers of the UFS, such as architects, may apply for valid cards. These persons will have to provide proof that they have business on campus (complete online application form and sign declaration).

All visitors to the campus will be referred to the Visitor’s Centre at Gate 5 (DF Malherbe Drive). This include, among others, parents, family and friends of students, as well as conference delegates. It is estimated that the Visitor’s Centre will be completed at the end of November (note that the gate at DF Malherbe Drive will be operational by 3 November 2014). Visitors will sign in at the Visitor’s Centre and, depending on the business they have on campus, they will only be allowed on campus for a certain period of time.

•    Lane 1 at Gate 5 will be used by visitors and service providers to enter the campus. Only card holders will be able to use lane 2.
•    Buses and trucks can also enter the campus through Gate 5.

The construction at the Main Gate at Nelson Mandela Drive is to build one extra lane for incoming traffic. The project is estimated to be completed at the end of October 2014.

•    For outgoing traffic, lane 1 (furthest from the guardhouse) and lane 2 will only be used by card holders and lane 3 (closest to the booth) will be used by service providers.
•    For incoming traffic, lanes 2 and 3 were set aside for use by only service providers. Lanes 1 and 4 will be used by only card holders.

Pedestrians

All gates for motorists will also be equipped with a pedestrian thoroughfare on completion of the project. Persons using these pedestrian gates also need to use their cards to get access to the campus.

Pedestrians who are visitors, but aren’t in possession of a valid access card, should please go to the Visitor’s Centre at the gate in DF Malherbe Drive where they will be helped.

More information

For more information on access control at the UFS, please watch our videos and read the Q&A or e-mail your enquiries to accesscontrol@ufs.ac.za.

Issued by: Lacea Loader (Director: Communication and Brand Management)
Tel: +27(0)51 401 2584 | +27(0)83 645 2454
E-mail: news@ufs.ac.za

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