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18 February 2019 | Story Leonie Bolleurs | Photo HO de Waal
Ground spiny Cactus pear
Shredded, sun-dried, and coarsely ground spiny cactus pear (Opuntia ficus-indica and O. engelmannii), ready to be included in balanced diets for ruminant livestock (cattle, sheep, goats) and wild antelopes.

Prof HO de Waal, researcher in the Department of Animal, Wildlife and Grassland Sciences at the University of the Free State (UFS), has developed a standard procedure for the processing of spiny cactus pear (Opuntia spp.) into livestock fodder. This will ultimately assist in the management of massive infestations of spiny cactus pear and help to convert underutilised farmland back to natural grazing land.

In addition to applying biological control agents, mechanical control is used to harvest alien spiny cactus pear, and the large volume of material is processed as livestock feed.

 

Introduced to South Africa

 

Three hundred years ago, seafarers visiting the Cape of Good Hope introduced the well-known invading alien spiny cactus pear to South Africa. These were later transported inland and by the 1950s about one million ha of South Africa had been invaded by the alien cacti.

Some regions in the Eastern Cape have been taken over by dense, impenetrable thickets of these cacti. Invasive alien plants (IAPs) such as cacti pose a direct threat to, among others, South Africa’s water security and productive use of land.

A range of methods is used to control IAPs, including mechanical, chemical, biological, and integrated control methods.

A control programme must include the three phases of initial control to drastically reduce the existing population; follow-up control of seedlings, root suckers, and coppice growth; and maintenance control on an annual basis to sustain low alien plant numbers.

 

Processing spiny cactus pears

 

According to Prof De Waal, the harvesting and processing of the spiny cactus pear is fairly simple. Although it requires a good measure of physical strength, perseverance, and the necessary protective clothing, the cacti can be processed by harvesting the plants; shredding the cladodes through a cladode cutter; then drying them in the sun, and lastly grinding it in a hammer mill. “The long spines are degraded mechanically by grinding the sun-dried cladode strips in a hammer mill before including it in balanced livestock diets,” said Prof De Waal.

Infestations will be opened, reclaimed, rehabilitated and the natural pastures (veld) allowed to revert back to grazing for livestock.

The National Resource Management Programme (NRM)P) will be approached for official support in clearing and rehabilitating massive areas of infestation by alien spiny cactus pear in the Eastern Cape. Such financial support will be an investment in reducing the infestation by invaders and the rehabilitation and sustainable use of natural resources in South Africa.

News Archive

“Every journey begins with the first steps” – Marguerite van der Merwe
2016-07-08

Description: Marguerite van der Merwe Tags: Marguerite van der Merwe

Marguerite van der Merwe, recipient of University of the
Free State Chancellor’s Medal, with Chancellor
Dr Khotso Mokhele, at the Winter Graduation ceremony.

Photo: Johan Roux

Marguerite van der Merwe has dedicated her life to the enrichment and increased quality of life for others. At the University of the Free State’s Winter Graduations on 30 June 2016, Van der Merwe and her brother, Anthony Douglas Osler, were both honoured with Chancellor’s Medals for exceptional service to South Africa and the world beyond our borders. In the early 1980s, she learned about the Alexander Technique and her life since then has been about perfecting the technique and sharing it with others. The Alexander Technique teaches people of any age, gender, occupation or interest, how to be posture-aware and perfect, how to be aware and alert, and how to be calm and discriminating, all of which are part of a practical teaching to integrate these qualities consciously into all our daily human activities.  

She walks the walk

She understood the Alexander Technique to be the perfect way to develop the body both physically and mentally, as it develops the higher mental faculties like focus, attention, awareness, consciousness, discrimination, and unfolding of the psyche, thus developing the human potential holistically as a spiritual way of being. She received her training for the technique in Cape Town and London, thereafter she published The Art of Walking, a guide to the Alexander Technique.

Van der Merwe is an internationally-certified teacher of the Alexander Technique, has been offering this work and its application in the spheres of health, education, and performance skills for 30 years, both nationally and internationally.

Van der Merwe says that the South African higher education system should encompass a holistic approach to teaching and educating. Education should envisage a modern vision of education that supports the evolution of the potential of the human being as a holistic system – a competent, skilled, caring, kind individual, developed in physical, mental, emotional and sensorial aspects. She believes that students thus educated will model ‘wholeness’ and ‘humanness’ as they take their place in society, business, education, and entrepreneurship.

Enriching women’s potential

Apart from The Art of Walking, Van der Merwe published EVE-OLUTION, a book to inspire women to listen to their intuition, and empower women to repossess their bodily wisdom, freedom, and authenticity. Van der Merwe proclaims that it is important to liberate women to take charge of their own bodies, minds, and souls. The purpose of the book is to ensure that young women soak up wisdom and encouragement and for older women to express their wisdom, which needs to be respected and listened to.

“Females and feminine roles in society and family are being liberated and acknowledged in the actions of many women as we stand for equal opportunity, equal power, and equality in many fields,” says Van der Merwe.
“Our young women in business and the higher education fraternity, for one, are strong in their views, beautiful in their presence, outspoken in leadership,” Van der Merwe concluded.

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