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17 September 2025 | Story Martinette Brits | Photo Martinette Brits and Kaleidoscope Studios
GreenerSA
Jeminah Seqela from Food and Trees for Africa demonstrates tree planting as part of the initiative to plant 100 trees on the day.

The University of the Free State (UFS) launched Greener SA, a five-year initiative to plant 400 000 trees across South Africa, at the Paradys Experimental Farm on Friday 12 September 2025. Backed by the Mastercard Foundation through the TAGDev 2.0 programme and RUFORUM, the project brings together government, industry, students, and academics around a shared commitment to sustainability and food security. The launch was marked by the planting of the first 100 trees, a symbolic act that set the tone for the years ahead.

Prof Jan-Willem Swanepoel, Director of the Centre for Sustainable Agriculture, reminded the audience that the UFS is one of 12 African universities entrusted with a $100 million investment in agricultural transformation. “This project is not a hit-and-run – it’s about sustainability, inclusivity, and building value chains that empower farmers and entrepreneurs,” he said. He ended with a parable of a farmhand who could ‘sleep when the wind blows,’ urging everyone to be proactive in preparing for inevitable challenges.

 

Responsibility and partnerships

That call for responsibility was echoed by Elzabe Rockman, Free State MEC for Agriculture and Rural Development, who linked Greener SA to the presidential One Million Trees Programme. She cautioned that planting without accountability leads to wasted effort. “If we plant trees, we want to be sure someone takes responsibility for them,” she said, highlighting the need for fire-resistant species, fruit trees in community gardens, and natural borders to replace vulnerable fencing. Looking at the students from Kovsie ACT who joined the launch, she added: “Jobs are not going to fall from the sky. They will come from agriculture and the environment. Harnessing youth energy is the way forward.”

Industry also pledged its support. Representing Empact Group – the sponsor of the trees – Helena Prinsloo described tree planting as an investment in legacy. “At Empact Group, we believe that doing right by our community and our planet is not just a responsibility. It’s a value that defines who we are and how we lead,” she said. Quoting the proverb that societies grow great when people plant trees whose shade they will never sit in, she added: “Today we are sowing seeds of hope, resilience, and opportunities for generations to come.”

 

Science, vision, and practice

Prof Corli Witthuhn from the Faculty of Natural and Agricultural Sciences placed the launch in a global context, pointing to conflict, inequality, and climate change – and the sobering United Nations report showing that only 20% of the sustainability goals have been achieved. For her, the Greener SA project is a response to urgent global challenges. “We want our students to be globally work-ready,” she said. “That means beyond textbooks, and this farm represents exactly that. We don’t want to produce graduates with degrees, we want to produce graduates who can walk into a lab, into a policy meeting, into a business anywhere in the world and make an impact.”

Her message was supported by expert voices. Guest speaker Prof Ben du Toit from Stellenbosch University explained that agroforestry systems can simultaneously provide timber, food, biodiversity, and resilience. “Agroforestry is not planting trees over here and grazing over there – it’s about integration, so that benefits reinforce each other,” he said.

At the Paradys Experimental Farm, this integration is already underway. Johan Barnard, Farm Manager and Junior Lecturer, described how shaded tree pockets will improve grazing fields and protect water resources, while fruit trees planted in partnership with Kovsie ACT will contribute to student nutrition and new food value chains. “We’re capturing value chains and taking it to the next level so that our students have research opportunities and the farm delivers real outputs,” he explained.

The launch of Greener SA showed that tree planting is about much more than beautification. It is a collective commitment – to resilience in the face of global challenges, to science applied in practice, and to building partnerships that prepare the next generation to make an impact.

News Archive

Research eradicates bacteria from avocado facility
2017-01-17

 Description: Listeria monocytogenes Tags: Listeria monocytogenes

Listeria monocytogenes as seen under an electron
microscope. The photo was taken with a transmission
electron microscope at the microscopy unit of the UFS.
Bacteriophages (lollipop-like structures) can be seen
next to the bacterial cells.
Photo: Supplied

“The aim of my project was to identify and characterise the contamination problem in an avocado-processing facility and then to find a solution,” said Dr Amy Strydom, postdoctoral fellow in the Department of Microbial Biochemical and Food Biotechnology at the University of the Free State (UFS).

Her PhD, “Control of Listeria monocytogenes in an Avocado-processing Facility”, aimed to identify and characterise the contamination problem in a facility where avocados were processed into guacamole. Dr Strydom completed her MSc in food science in 2009 at Stellenbosch University and this was the catalyst for her starting her PhD in microbiology in 2012 at the UFS. The research was conducted over a period of four years and she graduated in 2016. The research project was funded by the National Research Foundation.

The opportunity to work closely with the food industry further motivated Dr Strydom to conduct her research. The research has made a significant contribution to a food producer (avocado facility) that will sell products that are not contaminated with any pathogens. The public will then buy food that is safe for human consumption.


What is Listeria monocytogenes?

Listeria monocytogenes is a food-borne pathogenic bacterium. When a food product is contaminated with L. monocytogenes, it will not be altered in ways that are obvious to the consumer, such as taste and smell. When ingested, however, it can cause a wide range of illnesses in people with impaired immune systems. “Risk groups include newborn babies, the elderly, and people suffering from diseases that weaken their immune systems,” Dr Strydom said. The processing adjustments based on her findings resulted in decreased numbers of Listeria in the facility.

The bacteria can also survive and grow at refrigeration temperatures, making them dangerous food pathogens, organisms which can cause illnesses [in humans]. Dr Strydom worked closely with the facility and developed an in-house monitoring system by means of which the facility could test their products and the processing environment. She also evaluated bacteriophages as a biological control agent in the processing facility. Bacteriophages are viruses that can only infect specific strains of bacteria. Despite bacteriophage products specifically intended for the use of controlling L. monocytogenes being commercially available in the food industry, Dr Strydom found that only 26% of the L. monocytogenes population in the facility was destroyed by the ListexP100TM product. “I concluded that the genetic diversity of the bacteria in the facility was too high and that the bacteriophages could not be used as a control measure. However, there is much we do not understand about bacteriophages, and with a few adjustments, we might be able to use them in the food industry.”

Microbiological and molecular characterisation of L. monocytogenes

The bacteria were isolated and purified using basic microbiological culturing. Characterisation was done based on specific genes present in the bacterial genome. “I amplified these genes with polymerase chain reaction (PCR), using various primers targeting these specific genes,” Dr Strydom said. Some amplification results were analysed with a subsequent restriction digestion where the genes were cut in specific areas with enzymes to create fragments. The lengths of these fragments can be used to differentiate between strains. “I also compared the whole genomes of some of the bacterial strains.” The bacteriophages were then isolated from waste water samples at the facility using the isolated bacterial strains. “However, I was not able to isolate a bacteriophage that could infect the bacteria in the facility.

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