Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
26 September 2019 | Story Leonie Bolleurs | Photo Leonie Bolleurs
Read More Prof Wijnand Swart PSHB
A small 2 mm beetle, known as the Polyphagous shothole borer (PSHB) kills and infects trees. South Africa is the largest geographical area in the world to be infested with this tree killer. Pictured here is Prof Wijnand Swart who is working with two neighbourhood associations in Bloemfontein to monitor the occurrence of the beetle in the city.

Ornamental trees are dying all over South Africa, and it is feared that certain fruit and nut trees are also in danger. This is cause for great concern, not only among ecologists, farmers, foresters, and landscapers, but for homeowners as well. In private gardens and on streets throughout the country, trees that are afflicted include English oak, Chinese and Japanese maples, boxelder, and sweetgum.
 
The cause of all this havoc is a small 2-mm beetle, known as the Polyphgous shothole borer (PSHB; Euwallacea fornicatus) that originates from Southeast Asia.

Working to find a solution

"Based on damage seen in the USA and Israel, there is significant danger of losing many of our ornamental trees as well as fruit and certain nut trees in South Africa,” says Prof Wijnand Swart, Professor of Plant Pathology and Discipline Head in the Department of Plant Pathology at the University of the Free State (UFS).

Cases of afflicted trees were reported from all provinces in South Africa, except for Mpumalanga. Countries such as Israel and the USA have also suffered great losses as a result of this beetle.  

Research is being conducted on the beetle and its associated fungus, Fusarium euwallaceae, in order to understand their relationship and hopefully find a solution to stop, or at least manage, the invasion of trees. To investigate the largest geographical outbreak of this beetle in the world, academics from seven universities in South Africa are working together with the Forestry and Agricultural Biotechnology Institute (FABI) at the University of Pretoria through a multi-institutional and multi-disciplinary research network. UFS researchers are part of this network.
 
Senior Lecturer in the UFS Department of Plant Sciences, Dr Gert Marais, is conducting research on the PSHB and its associated fungi, with the focus on pecan trees, in conjunction with the South African Pecan Nut Producers' Association. Cases of infected pecan-nut trees were reported in the Northern Cape as well as in Nelspruit. 
 
Prof Swart is working with entomologists in the UFS Department of Zoology and Entomology to find a biological control agent to parasitise the beetle. “I have already found one instance of a parasitic wasp associated with the beetle and will continue to search for more specimens during the coming summer,” he commented. 
 
Understanding the beetle

The first cases of infected trees were discovered in 2017 when Dr Trudi Paap, associated with FABI and the South African National Biodiversity Institute, conducted a survey of pests and diseases in and around National Botanical Gardens in South Africa. 
 
FABI has been studying the tree killer intensively to find out more about its life cycle. The term ‘polyphagous’ refers to the ability of the PSHB to infest many different tree species.

On their website, FABI states that an important distinction is being made between different types of infestations. “Reproductive host trees are trees that are infested by the beetle and where it successfully establishes a breeding gallery in which the fungus grows, where eggs are laid, and larvae develop into mature adults, thus completing its life cycle. The majority of reproductive hosts eventually succumb to the disease symptoms caused by the fungus.”
 
“Non-reproductive host trees are trees where the beetle attacks, penetrates, and inoculates the fungus, which then starts to grow in the sapwood. However, the beetle either leaves or dies without reproducing in these trees. The fungus can eventually kill or damage reproductive hosts, but many of the tree species on this list seem to be unaffected.”
 
Involving the community

The situation also provides an opportunity for communities to directly benefit from research conducted by tertiary institutions. Prof Swart is working together with two neighbourhood associations in Bloemfontein to monitor the occurrence of the beetle in the city and surrounding areas. 

He urges residents in the Mangaung Metro who find instances of infected trees, to report it to Duart Hugo (duarthugo99@gmail.com ), who is compiling a database of infected trees in the area. 
 
FABI advises homeowners to cut down heavily infested reproductive host trees. Should you decide to burn the wood, note that beetles will fly away when the wood becomes hot or when smoke appears. Do not burn infested trees in uninfected areas.

Other interesting material

News Archive

UFS celebrates Kagiso Trust’s 30 years of commitment to the empowerment of impoverished communities
2015-07-15

From the left are: MEC Tate Makgoe, Free State Department of Education; Busi Tshabalala, Thabo Mofutsanyana Education District Director; Dean Zwo Nevhutalu,  Kagiso Trust Trustee  and UFS Director of Community Engagement, Bishop, Billy Ramahlele.
Photo: ?Thabo Kessah

Future sustainable partnerships in education will survive only if all partners are committed, honest, and transparent.

This is the view expressed by the Free State MEC for Education and UFS Council member, Tate Makgoe, during the panel discussion at the Qwaqwa Campus of the University of the Free State celebrating Kagiso Trust’s 30 years of commitment to the empowerment of impoverished communities. The topic was “The future partnership models for education in Africa”.

“Over the years, the partnership between the Free State Department of Education, the UFS, and Kagiso Trust has helped to expose the potential in our mainly rural children in the Qwaqwa area of the Thabo Mofutsanyana district,” said Makgoe.

”When we started in 2009, the matric pass rate in the district was 64%, and this rose to 87% in 2014. In Qwaqwa alone, we have managed to build 51 computer and 26 physical sciences laboratories. It was these laboratories that enabled the Free State to be the best performing province in the Physical Sciences in 2013,” added Makgoe.

“None of these achievements would have been possible if all the partners had not been committed to the course. Partnerships built on honesty and transparency are the best model, which we hope to export to other provinces and, indeed, countries,” Makgoe said.

Representing the UFS on the panel was the Director of Community Engagement, Bishop Billy Ramahlele, who added that collaborations can be successful only if the leadership was exemplary.

“As the university, we have had many collaboration with various government departments, and great strides have been achieved only with the Department of Education under the leadership of MEC Makgoe,” said Ramahlele.

”With the MEC on board, the UFS ended up dedicating its South Campus in Bloemfontein to supporting Free State schools. We now have 70 schools that benefit from live television broadcasts of lessons by some of our outstanding academics. This also enables our best academics to make a valued contribution to empowering our teachers. It also allows the university to maximise scarce resources to attain social cohesion,” he said.

In his remarks, Kagiso Trust Trustee, Dean Zwo Nevhutalu, said that Kagiso Trust was looking forward to continue working with its partners to maximise outcomes through limited resources.

“Kagiso Trust will continue to work with the poor and the marginalised and there is no better partner than the government itself. The government provides basic services, and education is one of them. This allows us to be innovative and not just dump books and equipment at schools because we are forced to by our corporate social investment obligations. Therefore, we challenge the government also to be innovative in building a sustainable future partnership model in education,” he said.

Among the dignitaries attending the panel discussion were Kagiso Trust Chairman, Dr Frank Chikane, and the late Dr Beyers Naude’s family.

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