Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
07 August 2025 | Story Martinette Brits | Photo Stephen Collett
Prof Willem Boshoff
Prof Willem Boshoff shares insights from decades of rust disease research during his inaugural lecture at the University of the Free State.

Rust diseases of food crops remain one of agriculture’s most enduring and evolving challenges. In his inaugural lecture on 23 July 2025 at the University of the Free State (UFS), Prof Willem Boshoff shared how these complex pathogens continue to pose a significant threat to South Africa’s staple crops – and why continued research is more critical than ever.

Titled Battling rust diseases of food crops in South Africa, the lecture reflected on decades of rust research and recent developments in pathogen virulence. Prof Boshoff, from the Department of Plant Sciences, emphasised that the threat posed by rust fungi today stems from their “mechanisms of variability, their ease of long-distance spore dispersal, and subsequent foreign race incursions”.

 

A shifting disease landscape

Rust fungi are biotrophic organisms that cannot be cultured on artificial growth media. This makes rust research a technically demanding field that requires living pathogen collections, seed sources, skilled researchers, and specialised infrastructure. Prof Boshoff noted that for more than 35 years, the UFS has been at the forefront of this work, monitoring rust pathogens on wheat, barley, oats, maize, and sunflower.

While wheat remains the most extensively studied type, recent rust outbreaks across a range of crops point to a worrying trend. A localised outbreak of stem rust on spring wheat in the Western Cape has been linked to race BFGSF, which carries a previously unknown combination of virulence genes affecting both wheat and triticale. In 2021, leaf rust race CNPSK was detected, showing virulence to the highly effective Lr9 resistance gene.

More recently, stripe rust race 142E30A+ – first reported in Zimbabwe – was found in wheat cultivars from the Free State and northern irrigation areas. “Results revealed increased susceptibility of especially spring irrigation wheat cultivars,” Prof Boshoff explained, particularly due to its virulence to the Yr9 and Yr27 resistance genes.

Rust pathogens affecting other crops are also evolving. In maize, only a few lines with mostly stacked resistance gene combinations were effective against all tested isolates. In sunflower, just four of 30 Agricultural Research Council national trial hybrids showed resistance to local rust races.

 

Building better resistance

A key strategy in rust control lies in identifying and understanding resistance in host plants. This, Prof Boshoff stressed, requires optimised phenotyping systems for both greenhouse and field conditions, along with a solid understanding of available resistance sources. At the UFS, several recent studies have contributed valuable data to both local and international plant breeding programmes.

“Continued local and regional rust research is critical,” he said. “It supports early detection of new races, alerts to producers through updated cultivar responses, and enables efficient breeding strategies and other sustainable methods of rust management.”

The rust programme at the UFS has not only supported varietal release and on-farm risk management, but also strengthened collaboration between plant scientists, industry partners, and international researchers. With South Africa’s strategic location and history of rust surveillance, the programme continues to play a pivotal role in continental and global food security efforts.

 

About Prof Willem Boshoff

Prof Willem Boshoff is a plant pathologist with a strong background in wheat breeding and rust disease control. He holds four degrees from the University of the Free State, all awarded cum laude: a BScAgric (1994), BScAgric Honours (1995), MScAgric (1997), and PhDAgric (2001). His doctoral research focused on the control of foliar rusts in wheat.

Between 2001 and 2016, he worked as a wheat breeder and contributed to the release of several commercial cultivars. He joined the UFS Department of Plant Sciences in 2017 and has since been actively involved in national and international research projects, capacity development, and advancing disease resistance in food crops.

News Archive

Three receive PhD degrees in Architecture at Winter Graduation ceremony
2015-07-08

Dr Hendrik Auret, Dr Gerhard Bosman and Dr Madelein Stoffberg.
Photo: Leonie Bolleurs

Three graduates from the University of the Free State’s (UFS) Department of Architecture received their PhD degrees at the 2015 Winter Graduation ceremony on the Bloemfontein Campus. According to Prof Walter Peters from Architecture, this is the first time in the history of the UFS that three PhD degrees in Architecture have been awarded simultaneously. It is country-wide a rare occurrence for three PhDs to be awarded in Architecture at one graduation ceremony.

“Previously, the UFS has only ever awarded a single PhD in Architecture, and that was in 1987, to Leon Roodt, a former head of the department. The first UFS honorary doctorate in Architecture was conferred on Gerard Moerdijk, architect of the Afrikaner church and the Voortrekker Monument. Gawie Fagan and Prof Bannie Britz, late head of the Department of Architecture, were other recipients of an honorary doctorate in Architecture,” said Prof Peters.

At the 2015 Winter Graduation ceremony, the UFS conferred PhDs in Architecture on Hendrik Auret from Roodt Architects in Bloemfontein as well as on Gerhard Bosman, and Madelein Stoffberg from the UFS Department of Architecture.

Dr Hendrik Auret

As an Architecture student at the university, Dr Auret obtained the degree BArchStud in 2004, a BArchStud (Hons) in 2005, and a March (Prof) in 2006, all cum laude. His Master’s design dissertation was judged the best from all South African Architecture learning sites, earning him the coveted ‘Corobrik Architectural Student of the Year’ award.

The work of the Norwegian architect and theorist, Christian Norberg-Schulz, served as the basis of Dr Auret’s PhD thesis, Care, place and architecture: a critical reading of Christian Norberg-Schulz’s architectural interpretation of Martin Heidegger’s philosophy, which considered the cogency of Norberg-Schulz’s architectural ‘translation’ of the German philosopher Heidegger’s thinking.

Dr Gerhard Bosman

On obtaining his BArchStud. and BArch degrees at the university in 1993 and 1995 respectively, Dr Bosman immediately joined the part-time staff of the Department of Architecture. As a lecturer in Building Construction, he developed an interest in vernacular and indigenous methods and techniques. Consequently, he built the first family home in Bloemfontein, for his wife, Debbie, and their two children, of earth construction, which been previously but erroneously considered inferior.

Despite that negative perception, Dr Bosman persuade the university to allow him to undertake post-graduate studies at the International Center for Earth Architecture (CRATerre-ENSAG) within the Ecole d' Architecture de Grenoble, France, from which institution,he was awarded the DPEA-Architecture de Terre qualification in 2000. In 2001,Dr Bosman was appointed to the full-time staff.

In 2003, when the opportunity arose, he became involved with SANPAD, the South Africa-Netherlands Research Project on Alternatives in Development, which lead ultimately to his PhD thesis: The acceptability of earth-constructed houses in central areas of South Africa.

Dr Madelein Stoffberg

In 2005, Dr Stoffberg enrolled as an Architecture student at the UFS, obtaining her BArchStud degree in 2007, the BArchStud (Hons) in 2008 and the March (Prof) in 2009, the latter cum laude. Immediately on graduating, Dr Stoffberg was appointed to her position as a part-time junior lecturer in the Department of Architecture.

During her studies, her attention was drawn to the concept of the spatial triad of Henri Lefebvre. Fascinated with the conceptand by the development of community centres as a contemporary architectural typology, she began her PhD degree.  

Entitled Lived reality, perception and architecture: two community centres interrogated through the lens of Lefebvre’s spatial triad, Dr Stoffberg investigated the relationship between the spatial understanding of the project architect and the community of two completed buildings in Port Elizabeth. She established a mismatch in perception, representation, and use of space, which could be bridged, however, by way of a qualitative research approach, instead of a quantitative one.


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