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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.

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#Women’sMonth: A career in Sign Language interpreting proves to be full of rewards for Natasha Parkins-Maliko
2017-08-03

 Description: Natasha Parkins-Maliko new Tags: Natasha Parkins-Maliko new 

Natasha Parkins-Maliko. She
was recently awarded the Pansalb
Multilingual Award in the category:
Translation and Interpreting 2016/2017,
as recognition for her achievements
in a sixteen-year career.
Photo: Supplied

Natasha Parkins-Maliko is an alumna of the University of the Free State who graduated with a master’s in Linguistics. She is a well-rounded interpreter with a language combination of South African Sign Language-English-Afrikaans. She continued her studies and achieved an international master’s in Sign Language interpreting at the Humak University of Applied Sciences in Finland.  Natasha was recently presented with the Pansalb Multilingual Award in the category: Translation and Interpreting 2016/2017, as recognition for her achievements in a sixteen-year career.

“Winning the Pansalb Translation and Interpreting Award for 2016/2017, was for me as Kovsie a pat on the back in the true sense of the word.  The university is where I started my journey in South African Sign Language interpreting, and from then on, I never looked back,” she said.

Her interpreting career has provided many challenges, and was accompanied by great achievements along the way.

A career of fulfilment in Sign Language

“The foundation of my success was laid by my lecturers and mentors, such as Dr Philemon Akach and Emily Matabane, where I trained in the Department of South African Sign Language (SASL) at the university.”

“My determination and success is grounded in the motto, ‘Inspiring Excellence, Transforming Lives’ – a continued journey in excellence gives a renewed sense of pride for all language practitioners in South Africa,” she said.

Natasha went on to work in the deaf community for most of her career. She started as a grassroots interpreter, and is now a professional interpreter registered with SATI (South African Translators Institute). She is also a Sign Language television interpreter on SABC for content such as SABC 3 news bulletins, the budget speech, opening of Parliament, Youth Day broadcasts, January 8th statement broadcasts, MPC Reserve Bank speeches, and many more. Natasha is not only concerned with growing her career – despite her mover and shaker persona, she still takes time to volunteer her services for deaf people who do not have the financial ability to pay for interpreting.

“Winning the Pansalb Translation and
Interpreting Award for 2016/2017, was
for me as Kovsie a pat on the back in
the true sense of the word.”

The journey to excellence never stops
Over and above lecturing in Interpreting and Translation at Wits University, Natasha is still in pursuit of excellence. She is a PhD candidate in the SASL Interpreting programme at Wits University, the first of its kind in the country, and is pursuing an AIIC (International Association of Conference Interpreters) accreditation. Her aim is to put South African Sign Language interpretation on the global map.

As a role model and icon in her field, Natasha is the chairperson of the National Association of South African Sign Language Interpreters (NASASLI), the regional coordinator for the African Federation of Sign Language Interpreters (AFSLI), and the Africa regional representative on the board of the World Association of Sign Language Interpreters (WASLI).  The award presented to her is no doubt a fitting accolade and something all UFS alumni takes pride in.

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