Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
14 August 2024 | Story Martinette Brits | Photo Supplied
Dr Luther van der Mescht
Dr Luther van der Mescht, Senior Lecturer in the Department of Zoology and Entomology.

Ticks that feed on South Africa’s cattle are developing resistance to the only effective pesticides, making them increasingly difficult to control. If this issue is not addressed, the spread of these parasites and their resistance to pesticides could significantly impact farmers' incomes and food security.

According to a study by Dr Luther van der Mescht, Senior Lecturer in the Department of Zoology and Entomology, many tick populations in South Africa are resistant to at least two of the three main types of acaricides (chemical classes) used in the country.

Dr Van der Mescht notes that with around 12 million cattle in South Africa, these ticks not only lower meat and milk production but also carry pathogens that can cause potentially fatal diseases. He estimates that the economic losses from tick-borne diseases and the use of acaricides could reach up to R670 million annually in the cattle industry alone.

He adds that South Africa's agricultural sector is unique due to its dual farming system, which includes both subsistence and commercial farmers, amplifying the impact of ticks. “The country is also home to a wide variety of tick species that transmit numerous pathogens across a diverse range of habitats and climates in which cattle are farmed. Consequently, the effects of ticks and tick-borne diseases in South Africa may be more severe compared to those in developed countries.”

Dr Van der Mescht highlights that ticks are developing resistance primarily due to poor farm management practices, such as underdosing, overdosing, and excessive use of acaricides. “Additionally, insufficient government support in educating farmers and managing resistance exacerbates the problem.”

Managing acaricide resistance

Dr Van der Mescht explains that while ticks will inevitably develop resistance to acaricides, this usually happens much slower if pesticides are used strategically. To slow the development of resistance, several measures can be implemented: 

• Minimise the number of acaricide treatments.
• Assess tick diversity and acaricide resistance at the farm level and monitor it regularly. The study found that acaricide resistance was highly variable across South Africa, likely due to different farm management practices; hence it should be assessed at the farm level.
• Quarantine animals when transferring them to a new farm, ensuring they are free of ticks before releasing them.
• Rotate acaricides from different chemical classes, with a gap of at least two years between applications.

• Government veterinary services should raise awareness about acaricide resistance and provide support, particularly to under-resourced farmers. Establishing acaricide resistance testing laboratories would help monitor resistance and offer guidance to farmers.

Expert in parasitology

Dr Van der Mescht is particularly fascinated by the fact that most animals on earth follow a parasitic way of life. He graduated with a PhD in Conservation Ecology from the Department of Conservation Ecology and Entomology at Stellenbosch University in 2015, focusing on rodent parasites.

Career highlights include receiving the Wilhelm Neitz Memorial Scholarship in Parasitology from the Parasitological Society of Southern Africa (PARSA) for study abroad, and the Blaustein Centre for Scientific Cooperation Postdoctoral Fellowship in 2016 from Ben-Gurion University of the Negev, Israel, to conduct research on the experimental evolution of host specialisation. He also received the Claude Leon Foundation Postdoctoral Fellowship in 2019 to study the cat flea at Stellenbosch University’s Department of Botany and Zoology.

With over four years of experience in the industry at a contract research organisation, he has conducted more than 40 clinical studies for international pharmaceutical companies and published over 50 peer-reviewed scientific articles.

Making research visible, impactful, and relevant to society

Dr Van der Mescht recently published an article for The Conversation and participated in interviews with eNCA, Newzroom Afrika, and Cape Talk to discuss his research. “This effort aligns with the Vision 130 strategy of being a regionally engaged university and supports one of the key pillars of research development at the University of the Free State (UFS), which is to make our research visible, impactful, and relevant to society.”

He also highlighted the significance of popular science, noting that it helps scientists communicate their research to a broader audience, build their professional reputation, enhance their funding opportunities, and improve their research outcomes.

News Archive

Guest lecture: Mr Pretorius, CEO of McCarthy Limited
2004-11-05

The challenges facing business leaders in a rapidly changing South Africa

“The world we used to know does not exist anymore. Leaders are continually dealing with crisis and opportunities, in a high-pressure environment,” said Mr Brand Pretorius, honorary professor from the University of the Free State , delivering his 13th guest lecture on the challenges facing business leaders in a rapidly changing South Africa .

Mr Pretorius, CEO of McCarthy Limited, identified certain trends which are responsible for changes to the South African business environment. He said the South African business environment is ever-changing, fast moving, complex and unpredictable. “As business people we have to deal with the impact,” he said.

“Years ago we were globally isolated. Now we live in a shrinking borderless world with crumbling trade barriers. Globilisation of our economy is accelerating. For South African business leaders this creates a sea of export opportunities,” he said.

Although there are ongoing demands for substantial profit growth from shareholders, the days of focussing only on their interests are gone, said Mr Pretorius. Stakeholder commitment now enjoys high priority and business leaders have to deal with the challenges accompanying black economic empowerment and employment equity.

Customers are also well-informed and demanding. Business leaders could easily loose the loyalty of their customers because of a hyper-competitive environment with an oversupply of goods and services.

Mr Pretorius stated that staff want to be involved and are looking for meaning in their workplace. Employers also have to deal with HIV/Aids in their workplaces. Trauma, absenteeism and financial implications could have a great effect on the viability of a business.

Against these changes Mr Pretorius pointed out the challenges business leaders are facing. In doing so a number of questions arise. The external business climate is characterised by turbulence and change. Internally there is a need for stability and meaning. How do we handle both challenges effectively?

Because of changes strategy decay is taking place and past strategies become irrelevant. Mr Pretorius said that business leaders need to modify their business models to prevent the downfall of their companies.

It is important for leaders to know what is happening in their world. “Continuous innovation is a critical success factor. The reality is that innovation is the only insurance against irrelevance,” he said.

Because of a changed environment leaders must perform and transform, simultaneously. How do we strike a balance between focused transformation and the achievement of world class performance, asked Mr Pretorius? “We need to bring about meaningful and sustainable empowerment, in order to create an inclusive economy and society. Leadership and management profiles should reflect the diversity of our teams, however at the same time every effort should be made to stop the brain drain and retain the expertise of experienced white managers.”

He also stated that leaders have an important role to play in terms of employment creation and corporate caring. “Sustainable stability and prosperity will not materialise without efforts in this regard.”

Mr Pretorius said that above challenges could be addressed by developing the ability to focus on creating a better future, rather than defending the past, a long-term vision, facing new realities, enhancing the value of brands and mobilising IT and the Internet to serve the business and customers better.

Retaining a positive vision of the future, embracing change and transformation, building your business according to the right principles and values and aspiring to be the best are some of the guidelines, according to Mr Brand, for future business success. He stated that creating a value advantage above one’s competitors, customer satisfaction and retention and inspirational leadership will add to the success of one’s business.

“We are indeed living in the era of the ultimate challenges, but also the ultimate opportunities. Let me clearly state that I have hope – in my view the tide has turned. Every day I experience small miracles inspired by ordinary people making an extraordinary difference,” said Mr Pretorius.

 

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
5 November 2004

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