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01 April 2019 | Story Leonie Bolleurs | Photo Sonia Small
Summer School
Perspectives on aquatic biomonitoring from Germany and Southern Africa were discussed at the recent German-Southern African Summer School 2019.

Water is a basic resource upon which communities rely for their health, well-being, and economic development and growth. Many countries struggle with the negative consequences of poor surface-water quality, which may threaten their food security and livelihoods.

The Centre for Environmental Management at the University of the Free State recently co-presented the German-Southern African Summer School 2019 with the Dresden University, Germany, on its Bloemfontein Campus. 

Discussions at the Summer School – attended by 66 delegates from Germany and Southern Africa – mainly focused on aquatic biomonitoring and included perspectives from Germany and Southern Africa. 

Questions such as ‘How to improve water quality?’ and ‘What about the impact of the catchment area, land use, and agriculture on water quality?’ were discussed. 

According to Marinda Avenant, Lecturer in the Centre for Environmental Management, a two-pronged approach is often used: first, ecosystem-based biomonitoring, and second, specialised water quality and toxicity-assessment methods applied at specific sites in order to identify problems.

Presenters from academia, government authorities, and the private sector shared theoretical concepts and practical experiences of establishing aquatic biomonitoring networks in Germany, South Africa, Namibia, Lesotho, Eswatini (Swaziland), and Zambia. 

The Summer School focused on an integrated approach, including catchment processes, hydrology, geomorphology, and land use, as well as chemical and biological monitoring. 

Delegates also undertook a field trip to Mokala National Park for a practical demonstration of water-quality monitoring as part of the programme. 

The Volkswagen Foundation (Germany) funded the Summer School.


News Archive

Plant-strengthening agent a result of joint effort between UFS and German company
2015-07-27

Research over the past few years has showed that the agent applied mostly as a foliar spray subsequently leads to better seedlings as well as growth and yield enhancement of various crops.

The application of a plant-strengthening agent in the agricultural industry has, until recently, been largely ignored, says Dr Elmarie van der Watt of the Department of Soil, Crop, and Climate Sciences at the University of the Free State (UFS). The agent was co-developed by researchers at the UFS and a German company.

The product is moving into new markets, such as China, Vietnam, the USA, and Australia.

ComCat® was the result of extensive research by the German company Agraforum AG. Commercialisation was limited initially to Europe, while research was expanded to other parts of the world, with the University of the Free State as the main research centre.  ComCat® is a unique, non-toxic plant strengthening agent derived from wild plants. It enhances plant growth and yield, as well as resistance against abiotic and biotic stress factors.

Dr Van der Watt says that, in nature, plants communicate and interact by means of allelochemicals (the inherent silent tool of self-protection among plants) and other phytochemicals (chemical compounds that occur naturally in plants), as part of their resistance mechanisms towards biotic and abiotic stress conditions.

Most wild-plant varieties are usually well-adapted to resist these stress factors. However, monoculture crops have lost this ability to a large extent. “Active compounds contained in extracts from wild plants applied to monoculture crops can potentially supply the signal for the latter to activate their dormant resistance mechanisms.” 

Research over the past few years has showed that the agent applied mostly as a foliar spray subsequently leads to better seedlings as well as growth and yield enhancement of various crops.  A major advantage is that, despite its enhancing effects on root development and yield, it does not induce unwanted early vegetative growth that could jeopardise the final yield, as happened in the past for nitrogen application at an early growth stage. 

Dr Van der Watt says, “Physiological data on the effect of the natural bio-stimulant product on photosynthesis, respiration, and resistance towards biotic stress conditions indicate that it can be regarded as a useful tool to manipulate agricultural crops. Research also showed that the field of application for this natural product is never-ending, and new applications are being investigated every day.”

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