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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

Faculty of Law congratulated on 100 years of Iurisprudentia
2009-11-05

Prof. Johan Henning, Dean of the Faculty of Law at the UFS and Prof. Barry Rider from the Jesus College at the University of Cambridge in the UK.
Photo: Stephen Collett
This year the Faculty of Law at the University of the Free State (UFS) is celebrating a century of excellence in legal education under the theme “Iurisprudentia 100”. A number of prominent leaders in the international legal arena congratulated the faculty on this milestone achievement.

Prof. Harry Rajak, Emeritus Professor from the Sussex Law School at the University of Sussex in the United Kingdom communicated his heartiest congratulations to the faculty. “It has been my great privilege and pleasure to have had, for many years now, a close association with the Faculty of Law of the UFS. I have enjoyed several visits to the Law Faculty, during which I have benefited enormously from the vibrant intellectual, scholarly and extremely friendly atmosphere which you have all created, as well as from the enthusiasm and intelligence of your students. I look forward to the continuation for many more years of this important and fruitful connection,” he said.

Prof. Barry Rider from the Institute of Advanced Legal Studies at the Jesus College at Cambridge University in the UK also congratulated and expressed his admiration towards the faculty. “The reputation for excellence in the teaching of law and in its scholarly research that your faculty has attained both in the Republic and internationally is a testament to the outstanding efforts and commitment of so many generations of scholars in Bloemfontein. I have been extraordinarily privileged to be associated with your faculty. The achievements of your faculty are truly impressive,” he said.

The faculty also received wishes of congratulations from Prof. Thomas Hurst, Research Scholar and Professor of Law from the Levin College of Law at the University of Florida in the United States of America. “The UFS has established itself as a world renowned leader in legal education,” he said.

Mr Anton Trichardt from Londsdale Chambers, Melbourne Australia also conveyed his best wishes to the faculty. “Your Faculty of Law has indeed been an example of excellence in legal education, training and research. The Centre for Business Law and its monograph series has been an unrivalled trend-setter in law,” he said.

Old Mutual also conveyed its wishes of congratulations.
 

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